Journal Articles · Book Chapters · Abstracts · Datasets · GRASS-GIS · Magazine Articles · Other Documents

Here you can find a list of the papers I published, as well as some selected conference abstracts. The references are sorted, listed and formatted with Jekyll Schollar.

I intend to keep an open access copy of my papers at EarthArXiv.org and ArXiv.org, which means that you can read them even without a subscription to the publisher, but be warned that most of these are postprints created from the “accepted manuscript” (that is, they have the exact same content of the final published version, except for the publisher’s typesetting). For a final version, please refer to the publisher’s website (which may be behind a paywall).

And if you use reference managers (you should), you can get a file with all my publications: BibTex format: here (good for JabRef, Zotero and a bazillion others) RIS format: here (good for Mendeley or EndNote) (last update: 2020-12)

 

Journal Articles

* Denotes student co-author.
† Denotes post-doc co-author.

2021

  • Ferreira†, A. T. S., Siegle, E., Ribeiro, M. C. H., Santos, M. S. T., & Grohmann, C. H. 2021. The dynamics of plastic pellets on sandy beaches: a new methodological approach. Marine Environmental Research, 163: 105219.
    Abstract
    Plastic found in the coastal zone is a result of waste mismanagement. This material comes directly from offshore disposal or by fishing debris, other marine activities, and by marine currents and winds, as well as urban drainage systems and estuaries. Specifically, in the case of plastic pellets, which are spheres with 2-5 mm that constitute the raw material for the manufacture of plastic products, the Santos Port and the plastic factories in Cubatão city (Brazilian southeastern coast), are considered the main local sources for the São Paulo state coast. Consequently, the beaches most affected by this pollutant are those near Santos estuary, like Enseada do Guarujá beach. However, some questions are still open, such as: what are the mechanisms which control the pellets deposition, and which locations are most favorable for deposition on the beach? To answer these questions, a four-step research was carried out at Enseada beach: 1) Plastic pellets geodetic survey based on GNSS positioning; 2) Beach geomorphometric parameters (altitude, aspect, and slope) derived by Digital Elevation Model (DEM); 3) Strandline altitude estimated through wave climate and tide height; and, 4) Plastic pellets deposition Suitability Index (PSI). The joint analysis of the altimetric, geomorphometric and meteoceanographic aspects showed that the beach areas with altitudes higher than those calculated for the strandline (> 2.06 m), slope ∼ 3º and facing the same direction of the higher energy waves (157.5-202.5º) were more susceptible to pellet deposition. This indicates that the accumulation of this pollutant on the beach is controlled not only by its physical characteristics, but mainly by storm surge events. Besides, surveys with geodetic reference (fixed, univocal, and relatively stable on time) bring up altimetric information as a result of all interactions and can be compared with other beaches anywhere on the planet — thus contributing to a standardization of the survey methodology.
    BibTeX
    @article{Ferreira2021,
      author = {Ferreira$\†$, A. T. S. and Siegle, Eduardo and Ribeiro, Maria Carolina Hernandez and Santos, Marcelo Soares Teles and Grohmann, Carlos H.},
      title = {{The dynamics of plastic pellets on sandy beaches: a new methodological approach}},
      journal = {Marine Environmental Research},
      year = {2021},
      volume = {163},
      pages = {105219},
      issn = {0141-1136},
      access = {Paywalled},
      doi = {10.1016/j.marenvres.2020.105219},
      keywords = {Nurdles, GNSS, Strandline altitude, Extreme events, Storm surge, DEM},
      kind = {journal},
      owner = {guano},
      timestamp = {2021-01-05-23-00},
      url = {https://doi.org/10.1016/j.marenvres.2020.105219}
    }
    
    DOI

2020

  • Albuquerque*, R. W., Costa, M. O., Ferreira, M. E., Carrero, G. C., & Grohmann, C. H. 2020. Remotely piloted aircraft imagery for automatic tree counting in forest restoration areas: a case study in the Amazon. Journal of Unmanned Vehicle Systems, 8(3): 207–223.
    Abstract
    Throughout the world, restoration of degraded areas (RDA) is not only a global but also a local challenge. In this context, the Brazilian government committed itself to restore 12 million hectares of forests by 2030. RDA monitoring customarily depends on extensive fieldwork to collect data on all individuals planted. As remotely piloted aircrafts (RPAs) can reduce costs and time of fieldwork activities, studying this technology is therefore timely given. A crucial metric for RDA is the number of trees established in the area. Methods using RPAs on automatic tree counting showed good accuracy using algorithms based on the canopy height model (CHM), which is the difference between a digital surface model (DSM) and a digital terrain model (DTM). However, obtaining a DTM demands an extra computational processing step and may require field control points or manually delimiting objects on the surface. The study presented here proposes and evaluates a semi-automated methodology for counting trees directly on DSM in RDAs in the Amazon using RPA coupled with a red–green–blue standard photographic sensor. The DSM method obtained good overall accuracy and F-score indexes, superior to the CHM method for all study areas even when overall accuracy was low for both methods.
    BibTeX
    @article{Albuquerque2020,
      author = {Albuquerque*, Rafael Walter and Costa, Marcelo Oliveira and Ferreira, Manuel Eduardo and Carrero, Gabriel Cardoso and Grohmann, Carlos Henrique},
      title = {{Remotely piloted aircraft imagery for automatic tree counting in forest restoration areas: a case study in the Amazon}},
      journal = {Journal of Unmanned Vehicle Systems},
      year = {2020},
      volume = {8},
      number = {3},
      pages = {207-223},
      access = {Paywalled},
      doi = {10.1139/juvs-2019-0024},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-13-56},
      url = {https://doi.org/10.1139/juvs-2019-0024}
    }
    
    DOI

  • Grohmann, C. H., Garcia*, G. P. B., Affonso*, A. A., & Albuquerque*, R. W. 2020. Aeolian dune modelling from airborne LiDAR, terrestrial LiDAR and Structure from Motion-Multi View Stereo. Computers & Geosciences, 143: 104569.
    Abstract
    Sand dunes are commonly regarded as a challenge to traditional photogrammetry due their homogeneous texture and spectral response. In this work we present an evaluation of Structure from Motion-Multi View Stereo (SfM-MVS) to obtain high-resolution elevation data of coastal sand dunes based on images acquired by Remotely Piloted Aircraft (RPA). A Digital Elevation Model (DEM) of a dunefield in Southern Brazil was generated from 810 photos captured by an RPA at 100 m above the takeoff point in February 2019. Image matching was successful in all areas of the survey due the presence of superficial features (footprints and sandboard tracks) and visibility of the sedimentary stratification, highlighted by heavy minerals. Altimetric accuracy of the SfM-MVS DEM was validated by comparison with Terrestrial LiDAR (TLS) data collected during the same fieldwork campaign of the RPA flights. The SfM-MVS DEM was then compared to an Airborne LiDAR (ALS) DEM from October 2010. While the SfM-MVS and TLS DEMs are very similar, without any major difference in elevation or in the reconstruction of topographic features, the SfM-MVS DEM presents a small scale surface roughness not visible in the TLS DEM. The Feature Preserving DEM Smoothing (FPD) algorithm was applied to the SfM-MVS DEM with good results in terms of surface smoothing, but without any significant changes in descriptive statistics and error metrics, with an RMSE of 0.08 m and MAE of 0.06 m for both the original and the FPD-filtered DEM. Displacement of dune crest lines from the ALS and SfM-MVS DEMs resulted in a migration rate of ≈5 m/year between 2010 and 2019, in good agreement with rates derived from satellite images and historical aerial photographs of the same area. Sand volume change in the same period showed a decrease of only 0.2%, which can be related to the installation of sand fences to promote dune stabilization and sand removal from the front of the dune field to keep a road open to vehicles. ALS can cover large areas in little time but its high cost still remains a barrier to wider usage, especially by researchers in developing countries. TLS has an intermediate cost but demands more fieldwork and more processing time. In our case we needed three days for the TLS survey and around three weeks to produce a DEM of ≈80 400m2. On the other hand, we were able to cover ≈740 900m2 with six flight missions in under three hours, with ≈13 h processing time in a medium-range workstation. This makes SfM-MVS a low-cost solution with fast and reliable results for 3D modelling and continuous monitoring of coastal dunes.
    BibTeX
    @article{Grohmann2020cageo,
      author = {Grohmann, C. H. and Garcia*, G. P. B. and Affonso*, A. A. and Albuquerque*, R. W.},
      title = {{Aeolian dune modelling from airborne LiDAR, terrestrial LiDAR and Structure from Motion-Multi View Stereo}},
      journal = {Computers \& Geosciences},
      year = {2020},
      volume = {143},
      pages = {104569},
      access = {Paywalled},
      doi = {10.1016/j.cageo.2020.104569},
      kind = {journal},
      owner = {guano},
      pre_arxiv = {https://arxiv.org/abs/1910.06186},
      timestamp = {2020-12-30-13-55},
      url = {http://doi.org/10.1016/j.cageo.2020.104569}
    }
    
    DOI Preprint

  • Ciotta, M., Peyerl, D., Barrozo, L., Anna, L. S., dos Santos, E. M., Bermann, C., Grohmann, C., Moretto, E. M., & Tassinari, C. 2020. An overview of carbon capture and storage atlases around the world. Environmental Geosciences, 27(1): 1–8.
    Abstract
    Recent concerns about climate change and greenhouse gas emissions have a clear effect on the energy sector, directly affecting the use of fossil fuels. Companies and countries that depend on these sources of energy (so-called not clean) take actions to search for palliative solutions. The production of atlases of carbon capture and storage (CCS) is one of the collaborative actions that seeks to systematize and organize several aspects involving the use of CCS technologies. This paper focuses on an analytical overview of approaches addressed by five different CCS atlases published by Brazil, the United States, Canada, Mexico, Norway, and South Africa. The five atlases are available for public access; an analytical overview could substantiate the academic and technical decisions related to the future publication of a new atlas for any country and suggests the inclusion of new topics such as social and environmental issues.
    BibTeX
    @article{Ciotta2020,
      author = {Ciotta, Mariana and Peyerl, Drielli and Barrozo, Ligia and Anna, Lucy Sant and dos Santos, Edmilson Moutinho and Bermann, C{\'{e}}lio and Grohmann, Carlos and Moretto, Evandro Mateus and Tassinari, Colombo},
      title = {{An overview of carbon capture and storage atlases around the world}},
      journal = {Environmental Geosciences},
      year = {2020},
      volume = {27},
      number = {1},
      pages = {1--8},
      month = mar,
      access = {Paywalled},
      doi = {10.1306/eg.10221919015},
      kind = {journal},
      publisher = {American Association of Petroleum Geologists {AAPG}/Datapages},
      timestamp = {2020-12-30-12-31}
    }
    
    DOI

  • Gerolin, C. R., Pupim, F. N., Sawakuchi, A. O., Grohmann, C. H., Labuto, G., & Semensatto, D. 2020. Microplastics in sediments from Amazon rivers, Brazil. Science of The Total Environment, 749: 141604.
    Abstract
    We assessed the concentrations of microplastics in sediment samples collected in seven sites from Solimões, Negro and Amazon rivers, upstream and downstream the metropolitan region of Manaus. Concentrations ranged from 417 to 8178 particles/kg of dried sediment (microplastics: 0.063–5 mm), and from 0 to 5725 particles/kg of dried sediment (microplastics: 0.063–1 mm). The highest microplastics concentrations were observed in samples from shallow water (water depth of 5–7 m) sites with lower water velocity of the Negro river surrounding Manaus, and the lowest concentration in farthest sample collected in deeper zone (water depth of 34 m) of the Amazon river around 110 km downstream Manaus. The variation of microplastics concentrations within the studied area can be related to hydraulic characteristics defining the erosive-depositional behavior of the sampling sites and their proximity to Manaus. Our results represent the first report to show the ubiquitous presence and widespread distribution of microplastics in sediments from the lower Solimões, lower Negro and upper Amazon rivers.
    Keywords: Microplastics pollution; River sediment; Amazon
    BibTeX
    @article{Gerolin2020,
      author = {Gerolin, Cristiano Rezende and Pupim, Fabiano Nascimento and Sawakuchi, André Oliveira and Grohmann, Carlos Henrique and Labuto, Geórgia and Semensatto, Décio},
      title = {{Microplastics in sediments from Amazon rivers, Brazil}},
      journal = {Science of The Total Environment},
      year = {2020},
      volume = {749},
      pages = {141604},
      issn = {0048-9697},
      access = {Paywalled},
      doi = {10.1016/j.scitotenv.2020.141604},
      keywords = {Microplastics pollution, River sediment, Amazon},
      kind = {journal},
      timestamp = {2020-12-30-12-31},
      url = {https://doi.org/10.1016/j.scitotenv.2020.141604}
    }
    
    DOI

  • Simon, Q., Ledru, M.-P., Sawakuchi, A. O., Favier, C., Mineli, T. D., Grohmann, C. H., Guedes, M., Bard, E., Thouveny, N., Garcia, M., Tachikawa, K., Rodríguez-Zorro, P. A., & ASTER Team. 2020. Chronostratigraphy of a 1.5±0.1 Ma composite sedimentary record from Colônia basin (SE Brazil): Bayesian modeling based on paleomagnetic, authigenic 10Be/9Be, radiocarbon and luminescence dating. Quaternary Geochronology, 101081.
    Abstract
    We present a new 52 m composite record (COL17c) composed of five sedimentary sequences retrieved from the Colônia basin (Southeastern Brazil). The COL17c record is composed of two main sub-units deposited under different regimes: a peatland above  14 m and lacustrine sediments below. Sedimentary description and core scanning (MSCL and XRF) are first used to align individual cores in order to produce a nearly continuous composite record. We then established an original chronological framework based on radiocarbon, paleomagnetic, optically stimulated luminescence (OSL), post-infrared infrared stimulated luminescence at elevated temperature (pIRIR290°C) and authigenic 10Be/9Be dating. We describe the protocols used for each technique and discuss the positive and negative results, as well as their implications for proxy interpretation. In spite of negative results of some techniques, mainly due to the absence of adequate sample material, the multi-proxy approach used is essential to maximize the chances of obtaining a satisfactory age model for this unique continental sedimentary sequence. All valid chronological proxies, comprising three AMS 14C ages, one pIRIR290°C age, two paleomagnetic constraints and eight authigenic 10Be/9Be datum, are integrated within a Bayesian age-depth modeling to produce a 1.5 ± 0.1 Ma chronology for the whole COL17c sequence. This age model represents the first long-term chronological estimate of sediments deposition in the Colônia basin. The record allows to refine the age of the Colônia basin formation between 5.3 and 11.2 Ma, much older than previously estimated from short sedimentary cores.
    BibTeX
    @article{Simon2020,
      author = {Simon, Quentin and Ledru, Marie-Pierre and Sawakuchi, André Oliveira and Favier, Charly and Mineli, Thays D. and Grohmann, Carlos H. and Guedes, Marco and Bard, Edouard and Thouveny, Nicolas and Garcia, Marta and Tachikawa, Kazuyo and Rodríguez-Zorro, Paula A. and {ASTER Team}},
      title = {{Chronostratigraphy of a 1.5$\±$0.1 Ma composite sedimentary record from Colônia basin (SE Brazil): Bayesian modeling based on paleomagnetic, authigenic 10Be/9Be, radiocarbon and luminescence dating}},
      journal = {Quaternary Geochronology},
      year = {2020},
      pages = {101081},
      issn = {1871-1014},
      access = {Paywalled},
      doi = {10.1016/j.quageo.2020.101081},
      keywords = {Peat and lake sediments, Paleomagnetism, Luminescence dating, Radiocarbon, Authigenic Be/Be dating, Deep drilling},
      kind = {journal},
      timestamp = {2020-12-30-12-30}
    }
    
    DOI

2019

  • Pinaya, J. L. D., Cruz, F. W., Ceccantini, G. C. T., & et al. 2019. Brazilian montane rainforest expansion induced by Heinrich Stadial 1 event. Scientific Reports, 9(1): 17912.
    Abstract
    The origin of modern disjunct plant distributions in the Brazilian Highlands with strong floristic affinities to distant montane rainforests of isolated mountaintops in the northeast and northern Amazonia and the Guyana Shield remains unknown. We tested the hypothesis that these unexplained biogeographical patterns reflect former ecosystem rearrangements sustained by widespread plant migrations possibly due to climatic patterns that are very dissimilar from present-day conditions. To address this issue, we mapped the presence of the montane arboreal taxa Araucaria, Podocarpus, Drimys, Hedyosmum, Ilex, Myrsine, Symplocos, and Weinmannia, and cool-adapted plants in the families Myrtaceae, Ericaceae, and Arecaceae (palms) in 29 palynological records during Heinrich Stadial 1 Event, encompassing a latitudinal range of 30°S to 0°S. In addition, Principal Component Analysis and Species Distribution Modelling were used to represent past and modern habitat suitability for Podocarpus and Araucaria. The data reveals two long-distance patterns of plant migration connecting south/southeast to northeastern Brazil and Amazonia with a third short route extending from one of them. Their paleofloristic compositions suggest a climatic scenario of abundant rainfall and relative lower continental surface temperatures, possibly intensified by the effects of polar air incursions forming cold fronts into the Brazilian Highlands. Although these taxa are sensitive to changes in temperature, the combined pollen and speleothems proxy data indicate that this montane rainforest expansion during Heinrich Stadial 1 Event was triggered mainly by a less seasonal rainfall regime from the subtropics to the equatorial region.
    BibTeX
    @article{Pinaya2019,
      author = {Pinaya, Jorge L. D. and Cruz, Francisco W. and Ceccantini, Gregório C. T. and {et al.}},
      title = {{Brazilian montane rainforest expansion induced by Heinrich Stadial 1 event}},
      journal = {Scientific Reports},
      year = {2019},
      volume = {9},
      number = {1},
      pages = {17912},
      month = nov,
      issn = {2045-2322},
      access = {Open Access},
      doi = {10.1038/s41598-019-53036-1},
      etal = {Corrêa, Pedro L. P. and Pitman, Nigel and Vemado, Felipe and Lopez, Maria del Carmen S. and Pereira Filho, Augusto J. and Grohmann, Carlos H. and Chiessi, Cristiano M. and Stríkis, Nicolás M. and Horák-Terra, Ingrid and Pinaya, Walter H. L. and de Medeiros, Vanda B. and Santos, Rudney de A. and Akabane, Thomas K. and Silva, Maicon A. and Cheddadi, Rachid and Bush, Mark and Henrot, Alexandra-Jane and François, Louis and Hambuckers, Alain and Boyer, Frédéric and Carré, Matthieu and Coissac, Eric and Ficetola, Francesco and Huang, Kangyou and Lézine, Anne-Marie and Nourelbait, Majda and Rhoujjati, Ali and Taberlet, Pierre and Sarmiento, Fausto and Abel-Schaad, Daniel and Alba-Sánchez, Francisca and Zheng, Zhuo and De Oliveira, Paulo E.},
      kind = {journal},
      refid = {Pinaya2019},
      timestamp = {2020-12-30-12-34},
      url = {https://doi.org/10.1038/s41598-019-53036-1}
    }
    
    DOI

  • Garcia, G. P. B., & Grohmann, C. H. 2019. DEM-based geomorphological mapping and landforms characterization of a tropical karst environment in southeastern Brazil. Journal of South American Earth Sciences, 93: 14–22.
    Abstract
    This work presents a 1:10,000 geomorphological mapping of an area in southeastern Brazil, based on morphometric analysis of Digital Elevation Models (DEMs), while classical methods focus on photo interpretation. Data derived from the DEM include elevation, slope gradient, slope aspect, vertical and horizontal curvatures, amplitude, elongation and wavelength of landforms. These parameters were used along with slope shape and drainage patterns to classify the landforms according to the Land Systems method, in which portions of the landscape that presents similar terrains attributes are grouped from regional (low detail) to local (high detail) scales, respectively, Land Systems, Land Units and Land Elements. The São Paulo State geomorphological map at 1:1,000,000 scale is considered the best reference source, and was compared with the results obtained in this project. Two Land Systems, four Land Units and twelve Land Elements were identified in the study area. In this area, karst terrains are common and easily identified due their characteristics drainage patterns, amplitude and slope gradient. Karst terrain boundaries defined in this study do overlap with those defined in the state map, however the morphometric analysis allowed a better description of the terrain attributes used to define them. The terrain attributes derived automatically from the DEM enabled an accurate geomorphological classification of the study area. The methodology presented in this paper is considered effective for mapping landforms at a detailed scale and can be employed in regional scale mapping using coarser resolution DEMs.
    BibTeX
    @article{Garcia2019jsaes,
      author = {Garcia, Guilherme P.B. and Grohmann, Carlos H.},
      title = {{DEM-based geomorphological mapping and landforms characterization of a tropical karst environment in southeastern Brazil}},
      journal = {Journal of South American Earth Sciences},
      year = {2019},
      volume = {93},
      pages = {14 - 22},
      issn = {0895-9811},
      access = {Paywalled},
      doi = {10.1016/j.jsames.2019.04.013},
      keywords = {Geomorphology, Geomorphometry, Karst, Digital Elevation Model, Land systems, Ribeira river},
      kind = {journal},
      pre_earxiv = {https://doi.org/10.31223/osf.io/t6y2e},
      timestamp = {2020-12-30-12-34},
      url = {https://doi.org/10.1016/j.jsames.2019.04.013}
    }
    
    DOI Preprint

  • Pupim, F. N., Kern, A. K., Sawakuchi, A. O., Stern, A., Ribas, C. C., Grohmann, C. H., Chiessi, C. M., J., B. J. D., Cruz, F., Hartmann, G., Savian, J., Cracraft, J., Tamura, L., Almeida, R. P., & Mineli, T. 2019. Chronology of Terra Firme formation in Amazonian lowlands reveals a dynamic Quaternary landscape. Quaternary Science Reviews, 210: 154–163.
    Abstract
    In the Amazonian lowlands, the shift from a large wetland dominated by flooded forests (Várzea) to the modern incised valleys bounded by extensive areas of non-flooded forests (Terra Firme) is considered a key driver of the Amazonian mega-biodiversity. Dating the sedimentary beds covered by Terra Firme forest is crucial to constrain the timing of such landscape change. Here we determined the formation ages of widespread regions of Terra Firme substrates in central Amazonian lowlands combining optically stimulated luminescence (OSL) dating, magnetostratigraphy and palinostratigraphy. Our data suggest a very dynamic fluvial system leading to a recent expansion of Terra Firme forests and retraction of Várzea forests during the late Pleistocene. The shift from an extensively flooded to non-flooded surface resulted from river incision around 45-35 ka, which potentially influenced the distribution of taxa by expanding available habitat, creating new barriers to dispersal, or changing the permeability of previous barriers. Transitions between flooded and non-flooded landscapes may have driven diversification and caused changes to species distributions, contributing to the high species diversity and biogeographic patterns currently found in the region. The late Quaternary evolution of Terra Firme substrates reveals that physical landscape changes play a major role in shaping biotic habitats even in the 104–105 years time-scales.
    BibTeX
    @article{Pupim2019,
      author = {Pupim, F. N. and Kern, A. K. and Sawakuchi, A. O. and Stern, A. and Ribas, C. C. and Grohmann, C. H. and Chiessi, C. M. and J., {Bertassoli Jr.} D. and Cruz, F. and Hartmann, G. and Savian, J. and Cracraft, J. and Tamura, L. and Almeida, R. P. and Mineli, T.},
      title = {{Chronology of Terra Firme formation in Amazonian lowlands reveals a dynamic Quaternary landscape}},
      journal = {Quaternary Science Reviews},
      year = {2019},
      volume = {210},
      pages = {154 - 163},
      issn = {0277-3791},
      access = {Paywalled},
      doi = {10.1016/j.quascirev.2019.03.008},
      keywords = {Amazonia, Amazon river, Paleogeography, Fluvial evolution, Quaternary geochronology},
      kind = {journal},
      timestamp = {2020-12-30-12-33},
      url = {https://doi.org/10.1016/j.quascirev.2019.03.008}
    }
    
    DOI

2018

  • Viana*, C. D., Grohmann, C. H., Busarello*, M., & Garcia*, G. P. B. 2018. Structural analysis of clastic dikes using Structure from Motion - Multi-View Stereo: a case-study in the Paraná Basin, southeastern Brazil. Brazilian Journal of Geology, 48: 839–852.
    Abstract
    This work presents the development of a three-dimensional (3D) model of an outcrop of the Corumbataí Formation (Permian, Paraná Basin, Brazil) using Structure from Motion - Multi-View Stereo (SfM-MVS) technique in order to provide a structural analysis of clastic dikes cutting through siltstone layers. While traditional photogrammetry requires the user to input a series of parameters related to the camera orientation and its characteristics (such as focal distance), in SfM-MVS the scene geometry, camera position and orientations are automatically determined by a bundle adjustment, an iterative procedure based on a set of overlapping images. It is considered a low-cost technique in terms of hardware and software, also being able to provide point density and accuracy on par to the ones obtained withTerrestrial Laser Scanning. The results acquired on this research have good agreement with previous works, yielding a NNW main orientation for the dikes measured in the field and on the 3D model. The development of this work showed that SfM-MVS use and practice on geosciences still needs more studies on the optimization of the involved parameters (such as camera orientation, image overlap and angle of illumination), which, when accomplished, will result in less processing time and more accurate models.
    BibTeX
    @article{Viana2018bjgeo,
      author = {Viana*, C. D. and Grohmann, C. H. and Busarello*, M. and Garcia*, G. P. B},
      title = {{Structural analysis of clastic dikes using Structure from Motion - Multi-View Stereo: a case-study in the Paran\'a Basin, southeastern Brazil}},
      journal = {{Brazilian Journal of Geology}},
      year = {2018},
      volume = {48},
      pages = {839 - 852},
      month = dec,
      issn = {2317-4889},
      access = {Open Access},
      doi = {10.1590/2317-4889201800201898},
      kind = {journal},
      language = {en},
      publisher = {scielo},
      timestamp = {2020-12-30-12-36},
      url = {https://doi.org/10.1590/2317-4889201800201898}
    }
    
    DOI

  • Grohmann, C. H. 2018. Evaluation of TanDEM-X DEMs on selected Brazilian sites: Comparison with SRTM, ASTER GDEM and ALOS AW3D30. Remote Sensing of Environment, 212: 121–133.
    Abstract
    A first assessment of the TanDEM-X DEMs over Brazilian territory is presented through a comparison with SRTM, ASTER GDEM and ALOS AW3D30 DEMs in seven study areas with distinct geomorphological contexts, vegetation coverage, and land use. Visual analysis and elevation histograms point to a finer effective spatial (i.e., horizontal) resolution of TanDEM-X compared to SRTM and ASTER GDEM. In areas of open vegetation, TanDEM-X lower elevations indicate a deeper penetration of the radar signal. DEMs of differences (DoDs) allowed the identification of issues inherent to the production methods of the analyzed DEMs, such as mast oscillations in SRTM data and mismatch between adjacent scenes in ASTER GDEM and ALOS AW3D30. A systematic difference in elevations between TanDEM-X 12 m, TanDEM-X 30 m, and SRTM was observed in the steep slopes of the coastal ranges, related to the moving-window process used to resample the 12 m data to a 30 m pixel size. It is strongly recommended to produce a DoD with SRTM before using ASTER GDEM or ALOS AW3D30 in any analysis, to evaluate if the area of interest is affected by these problems. The DoDs also highlighted changes in land use in the time span between the acquisition of SRTM (2000) and TanDEM-X (2013) data, whether by natural causes or by human interference in the environment. The results show a high level of detail and consistency for TanDEM-X data, indicate that the effective horizontal resolution of SRTM is coarser than the nominal 30 m, and highlight the errors in ASTER GDEM and ALOS AW3D30 due to mismatch between adjacent scenes in the photogrammetric process.
    BibTeX
    @article{Grohmann2018rse,
      author = {Grohmann, C. H.},
      title = {{Evaluation of TanDEM-X DEMs on selected Brazilian sites: Comparison with SRTM, ASTER GDEM and ALOS AW3D30}},
      journal = {Remote Sensing of Environment},
      year = {2018},
      volume = {212},
      pages = {121 - 133},
      issn = {0034-4257},
      access = {Paywalled},
      doi = {10.1016/j.rse.2018.04.043},
      kind = {journal},
      pre_arxiv = {https://arxiv.org/abs/1709.05016},
      timestamp = {2020-12-30-12-36},
      url = {https://doi.org/10.1016/j.rse.2018.04.043}
    }
    
    DOI Preprint

2017

  • Riccomini, C., & Grohmann, C. H. 2017. Increasing the international visibility of the Brazilian Journal of Geology. Brazilian Journal of Geology, 47(1): 1–1.
    Abstract
    Since January 1st, 2017, the Board of Directors of the Brazilian Geological Society has honored the signatories to assume the editorial activities of the Brazilian Journal of Geology (BJG). Our responsibility is tremendous in the face of the hard work and efforts made by the previous Editor-in-Chief, Prof. Umberto G. Cordani, who was in charge of the journal for a little more than five years and, in this short term, gave it a new format, increased the publication of articles in English, and attained indexation in the best international databases such as Scopus and Web of Science. In 2015, the BJG received its first Impact Factor of 0.6, twice as expected.
    BibTeX
    @article{Riccomini2017,
      author = {Riccomini, Claudio and Grohmann, Carlos Henrique},
      title = {{Increasing the international visibility of the Brazilian Journal of Geology}},
      journal = {Brazilian Journal of Geology},
      year = {2017},
      volume = {47},
      number = {1},
      pages = {1--1},
      month = jan,
      access = {Open Access},
      doi = {10.1590/2317-4889201700000471},
      kind = {journal},
      publisher = {{FapUNIFESP} ({SciELO})},
      timestamp = {2020-12-30-12-35},
      url = {https://doi.org/10.1590/2317-4889201700000471}
    }
    
    DOI

2016

  • Rauen, V. A. B., Grohmann, C. H., Goveia, S. S., Mioto, C. L., Marini, L. B., Paranhos Filho, A. C., & Almeida, M. H. T. 2016. Geotecnologias na Determinação da Vulnerabilidade à Ocorrência de Vazamentos em Redes de Abastecimento de Água. Geociências (São Paulo), 35(3): 414–425.
    Abstract
    Pretendeu-se com este trabalho elaborar cartas de vulnerabilidade para o Município de Guarulhos, visando elaborar um mapa que identifique áreas vulneráveis à ocorrência de vazamentos de água e auxiliar companhias de saneamento na definição de áreas prioritárias para o controle de vazamentos, bem como acidentes geológicos induzidos por estes. Os mapas foram elaborados pela metodologia de álgebra desenvolvida em ambiente SIG, através da definição de fatores desencadeantes e seus respectivos pesos conforme a influência na deflagração dos eventos estudados. Para a análise da vulnerabilidade à ocorrência de vazamentos da rede de abastecimento de água foram utilizados na álgebra de mapas os fatores de idade, pressão da rede e número de manutenções recorrentes. Os maiores valores ocorreram nas redes que já haviam sofrido manutenções recorrentes, porém ao lançarmos no mapa os acidentes geológicos que foram levantados, estes estiveram associados a áreas de alta ou média vulnerabilidades. Portanto, pode-se concluir que os demais fatores analisados (idade e pressão) tiveram maior influência na deflagração desses eventos. Assim é possível concluir que a metodologia aplicada mostrou-se satisfatória aos objetivos propostos. Salienta-se que a metodologia pode ser integralmente desenvolvida em programas livres e gratuitos de SIG, facilitando desta maneira o acesso por órgãos públicos.
    BibTeX
    @article{Rauen2016,
      author = {Rauen, V. A. B. and Grohmann, C. H. and Goveia, S. S. and Mioto, C. L. and Marini, L. B. and Paranhos~Filho, A. C. and Almeida, M. H. T.},
      title = {{Geotecnologias na Determinação da Vulnerabilidade à Ocorrência de Vazamentos em Redes de Abastecimento de Água}},
      journal = {Geoci\^{e}ncias (S\~{a}o Paulo)},
      year = {2016},
      volume = {35},
      number = {3},
      pages = {414-425},
      kind = {journal},
      oalink = {http://www.revistageociencias.com.br/35/volume35_3_files/35-3-artigo-07.pdf},
      timestamp = {2020-12-30-12-53}
    }
    
    Download

  • Viana*, C. D., Endlein*, A., Campanha, G. A. C., & Grohmann, C. H. 2016. Algorithms for Extraction of Structural Attitudes from 3D Outcrop Models. Computers & Geosciences, 90: 112–122.
    Abstract
    The acquisition of geological attitudes on rock cuts using traditional field compass survey can be a time consuming, dangerous, or even impossible task depending on the conditions and location of outcrops. The importance of this type of data in rock-mass classifications and structural geology has led to the development of new techniques, in which the application of photogrammetric 3D digital models has had an increasing use. In this paper we present two algorithms for extraction of attitudes of geological discontinuities from virtual outcrop models: ply2atti and scanline, implemented with the Python programming language. The ply2atti algorithm allows for the virtual sampling of planar discontinuities appearing on the 3D model as individual exposed surfaces, while the scanline algorithm allows the sampling of discontinuities (surfaces and traces) along a virtual scanline. Application to digital models of a simplified test setup and a rock cut demonstrated a good correlation between the surveys undertaken using traditional field compass reading and virtual sampling on 3D digital models.
    BibTeX
    @article{Viana2016cageo,
      author = {Viana*, C. D. and Endlein*, A. and Campanha, G. A. C. and Grohmann, C. H.},
      title = {{Algorithms for Extraction of Structural Attitudes from 3D Outcrop Models}},
      journal = {Computers \& Geosciences},
      year = {2016},
      volume = {90},
      pages = {112-122},
      access = {Paywalled},
      doi = {10.1016/j.cageo.2016.02.017},
      kind = {journal},
      timestamp = {2020-12-30-12-36},
      url = {https://doi.org/10.1016/j.cageo.2016.02.017}
    }
    
    DOI

  • Grohmann, C. H. 2016. Comparative Analysis of Global Digital Elevation Models and Ultra-Prominent Mountain Peaks. ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences, III-4: 17–23.
    Abstract
    Global Digital Elevation Models (GDEMs) are datasets of vital importance for regional-scale analysis in areas such as geomorphology, [paleo]climatology, oceanography and biodiversity. In this work I present a comparative assessment of the datasets ETOPO1 (1’ resolution), GTOPO30, GLOBE, SRTM30 PLUS, GMTED2010 and ACE2 (30”) against the altitude of the world’s ultra prominent peaks. GDEMs’ elevations show an expected tendency of underestimating the peak’s altitude, but differences reach 3,500 m. None of the GDEMs captures the full range of elevation on Earth and they do not represent well the altitude of the most prominent peaks. Some of these problems could be addressed with the release of NASADEM, but the smoothing effect caused by moving-window resampling can only be tackled by using new techniques, such as scale-adaptative kernels and curvature-based terrain generalisation.
    BibTeX
    @article{Grohmann2016isprs,
      author = {Grohmann, C. H.},
      title = {{Comparative Analysis of Global Digital Elevation Models and Ultra-Prominent Mountain Peaks}},
      journal = {ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences},
      year = {2016},
      volume = {III-4},
      pages = {17--23},
      note = {http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-4/17/2016/},
      access = {Open Access},
      doi = {10.5194/isprs-annals-III-4-17-2016},
      kind = {journal},
      timestamp = {2020-12-30-12-35},
      url = {https://doi.org/10.5194/isprs-annals-III-4-17-2016}
    }
    
    DOI

2015

  • Sawakuchi, A. O., Hartmann, G. A., Sawakuchi, H. O., Pupim, F. N., Bertassoli, D. J., Parra, M., Antinao, J. L., Sousa, L. M., Sabaj Pérez, M. H., Oliveira, P. E., Santos, R. A., Savian, J. F., Grohmann, C. H., Medeiros, V. B., McGlue, M. M., Bicudo, D. C., & Faustino, S. B. 2015. The Volta Grande do Xingu: reconstruction of past environments and forecasting of future scenarios of a unique Amazonian fluvial landscape. Scientific Drilling, 20: 21–32.
    Abstract
    The Xingu River is a large clearwater river in eastern Amazonia and its downstream sector, known as the Volta Grande do Xingu ("Xingu Great Bend"), is a unique fluvial landscape that plays an important role in the biodiversity, biogeochemistry and prehistoric and historic peopling of Amazonia. The sedimentary dynamics of the Xingu River in the Volta Grande and its downstream sector will be shifted in the next few years due to the construction of dams associated with the Belo Monte hydropower project. Impacts on river biodiversity and carbon cycling are anticipated, especially due to likely changes in sedimentation and riverbed characteristics. This research project aims to define the geological and climate factors responsible for the development of the Volta Grande landscape and to track its environmental changes during the Holocene, using the modern system as a reference. In this context, sediment cores, riverbed rock and sediment samples and greenhouse gas (GHG) samples were collected in the Volta Grande do Xingu and adjacent upstream and downstream sectors. The reconstruction of past conditions in the Volta Grande is necessary for forecasting future scenarios and defining biodiversity conservation strategies under the operation of Belo Monte dams. This paper describes the scientific questions of the project and the sampling surveys performed by an international team of Earth scientists and biologists during the dry seasons of 2013 and 2014. Preliminary results are presented and a future workshop is planned to integrate results, present data to the scientific community and discuss possibilities for deeper drilling in the Xingu ria to extend the sedimentary record of the Volta Grande do Xingu.
    BibTeX
    @article{Sawakuchi2015,
      author = {Sawakuchi, A. O. and Hartmann, G. A. and Sawakuchi, H. O. and Pupim, F. N. and Bertassoli, D. J. and Parra, M. and Antinao, J. L. and Sousa, L. M. and Sabaj P\'erez, M. H. and Oliveira, P. E. and Santos, R. A and Savian, J. F. and Grohmann, C. H. and Medeiros, V. B. and McGlue, M. M. and Bicudo, D. C. and Faustino, S. B.},
      title = {{The Volta Grande do Xingu: reconstruction of past environments and forecasting of future scenarios of a unique Amazonian fluvial landscape}},
      journal = {Scientific Drilling},
      year = {2015},
      volume = {20},
      pages = {21--32},
      access = {Open Access},
      doi = {10.5194/sd-20-21-2015},
      kind = {journal},
      timestamp = {2020-12-30-12-40},
      url = {10.5194/sd-20-21-2015}
    }
    
    DOI

  • Nascimento Jr., D. R., Sawakuchi, A. O., Guedes, C. C. F., Giannini, P. C. F., Grohmann, C. H., & Ferreira, M. P. 2015. Provenance of sands from the confluence of the Amazon and Madeira rivers based on detrital heavy minerals and luminescence of quartz and feldspar. Sedimentary Geology, 316(0): 1–12.
    Abstract
    The neotectonic evolution of the eastern edge of the Paraná Basin in the Santa Catarina State, Brazil was investigated using field data and detailed morphometric analysis along an east–west section. Analysis included generation of maps of isobase, hydraulic gradients, hypsometry, incision of drainage basins, drainage asymmetry and anomalous morphological features. All these maps generated results that agreed with field data and helped define recent faults in directions close to N–S and E–W, both probably reactivated faults of the Paraná Basin and the basement. Geomorphological features identified in topographic maps, possibly related to neotectonism, have a close agreement with our observations in the field. The asymmetry of basins as analysed by the T-Index method proved to be compatible with the influence of a E–W compressive tectonic regime and showed a movement from W to E. Application of the hypsometric integral technique helped establish a correlation between the younger basins with structures trending N–S (±30°). The N–S faults were related to a compressional stress field (SHmax) close to E–W and SHmin (stress minimum) around N–S, thereby establishing a tectonic context of structures developed in a transpressive regime. The compressional field was caused by the subduction of the Nazca tectonic plate below the South American plate, whereas the transcurrent component exploited pre-existent E–W structures when the Atlantic Ocean was opening.
    BibTeX
    @article{NascimentoJr2015,
      author = {{Nascimento Jr.}, Daniel R. and Sawakuchi, Andr{/'e} O. and Guedes, Carlos C. F. and Giannini, Paulo C. F. and Grohmann, Carlos H. and Ferreira, Manuela P.},
      title = {{Provenance of sands from the confluence of the Amazon and Madeira rivers based on detrital heavy minerals and luminescence of quartz and feldspar}},
      journal = {Sedimentary Geology},
      year = {2015},
      volume = {316},
      number = {0},
      pages = {1 - 12},
      issn = {0037-0738},
      access = {Paywalled},
      doi = {10.1016/j.sedgeo.2014.11.002},
      keywords = {Provenance},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-40},
      url = {http://dx.doi.org/10.1016/j.sedgeo.2014.11.002}
    }
    
    DOI

  • Grohmann, C. H. 2015. Effects of spatial resolution on slope and aspect derivation for regional-scale analysis. Computers & Geosciences, 77: 111–117.
    Abstract
    This paper investigates differences between morphometric parameters (slope and aspect) derived from a resampled DEM and resampled morphometric data derived from a medium resolution DEM, with examples for three study areas in South America selected to represent flatlands, hilly terrain, and mountain ranges. Using a low resolution DEM for regional scale morphometric analysis is not an optimal choice, since attenuation of elevation will strongly affect the distribution of calculated parameters. Unless bounded by computational constraints, one should choose to derive basic morphometric parameters from higher resolution data, and resample it to a coarser resolution as needed.
    BibTeX
    @article{Grohmann2015cageo,
      author = {Grohmann, C. H.},
      title = {{Effects of spatial resolution on slope and aspect derivation for regional-scale analysis}},
      journal = {Computers \& Geosciences},
      year = {2015},
      volume = {77},
      pages = {111-117},
      access = {Paywalled},
      doi = {10.1016/j.cageo.2015.02.003},
      kind = {journal},
      owner = {guano},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/6XC29},
      timestamp = {2020-12-30-12-40},
      url = {http://dx.doi.org/10.1016/j.cageo.2015.02.003}
    }
    
    DOI Postprint

  • Giannini, P. C. F., Assine, M. L., Basilici, G., & Grohmann, C. H. 2015. Excerpts from the 6th Latin American Congress of Sedimentology. Brazilian Journal of Geology, 45: 1–2.
    Abstract
    The 6 th Latin American Congress of Sedimentology (VI LACS) was held at the Universidade de São Paulo main campus, in the city of São Paulo, 14-17 July 2013. This is the main scientific event focused on the Latin American community of sedimentologists and stratigraphers, promoted under the seal of IAS, the International Association of Sedimentologists, since 1997. The VI LACS had 380 registrations: 251 from Brazil and 129 from 17 other countries, mainly of South America. There were 121 presented works, which integrated the abstracts book. After the event, the authors were invited to submit a full paper version of theirs abstracts to the Annals of the Congress , which is being published now as this special supplement of the Brazilian Journal of Geology , with financial support from the Brazilian National Council for Scientific and Technological Development - CNPq (Grant 452723/2013-2).
    BibTeX
    @article{Giannini2015,
      author = {Giannini, Paulo C. Fonseca and Assine, Mario Luis and Basilici, Giorgio and Grohmann, Carlos Henrique},
      title = {{Excerpts from the 6th Latin American Congress of Sedimentology}},
      journal = {{Brazilian Journal of Geology}},
      year = {2015},
      volume = {45},
      pages = {1 - 2},
      month = aug,
      issn = {2317-4889},
      access = {Open Access},
      crossref = {10.1590/2317-4889201545000},
      doi = {10.1590/2317-4889201545000},
      kind = {journal},
      language = {en},
      publisher = {scielo},
      timestamp = {2020-12-30-12-38},
      url = {https://doi.org/10.1590/2317-4889201545000}
    }
    
    DOI

2014

  • Jacques, P. D., Salvador, E. D., Machado, R., Grohmann, C. H., & Nummer, A. R. 2014. Application of morphometry in neotectonic studies at the eastern edge of the Paraná Basin, Santa Catarina State, Brazil. Geomorphology, 213(0): 13–23.
    Abstract
    The neotectonic evolution of the eastern edge of the Paraná Basin in the Santa Catarina State, Brazil was investigated using field data and detailed morphometric analysis along an east–west section. Analysis included generation of maps of isobase, hydraulic gradients, hypsometry, incision of drainage basins, drainage asymmetry and anomalous morphological features. All these maps generated results that agreed with field data and helped define recent faults in directions close to N–S and E–W, both probably reactivated faults of the Paraná Basin and the basement. Geomorphological features identified in topographic maps, possibly related to neotectonism, have a close agreement with our observations in the field. The asymmetry of basins as analysed by the T-Index method proved to be compatible with the influence of a E–W compressive tectonic regime and showed a movement from W to E. Application of the hypsometric integral technique helped establish a correlation between the younger basins with structures trending N–S (±30°). The N–S faults were related to a compressional stress field (SHmax) close to E–W and SHmin (stress minimum) around N–S, thereby establishing a tectonic context of structures developed in a transpressive regime. The compressional field was caused by the subduction of the Nazca tectonic plate below the South American plate, whereas the transcurrent component exploited pre-existent E–W structures when the Atlantic Ocean was opening.
    BibTeX
    @article{Jacques2014,
      author = {Jacques, Patricia D. and Salvador, Elizete D. and Machado, R\^{o}mulo and Grohmann, Carlos H. and Nummer, Alexis R.},
      title = {{Application of morphometry in neotectonic studies at the eastern edge of the Paraná Basin, Santa Catarina State, Brazil}},
      journal = {Geomorphology},
      year = {2014},
      volume = {213},
      number = {0},
      pages = {13-23},
      issn = {0169-555X},
      access = {Paywalled},
      doi = {10.1016/j.geomorph.2013.12.037},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-40},
      url = {http://dx.doi.org/10.1016/j.geomorph.2013.12.037}
    }
    
    DOI

  • Tennant, J. P., Poisot, T., Kubke, M. F., & et al. 2014. Open Letter to The American Association for the Advancement of Science. The Winnower, 2: e140813.35294.
    Abstract
    This is an open letter concerning the recent launch of the new open access journal, Science Advances. In addition to the welcome diversification in journal choices for authors looking for open access venues, there are many positive aspects of Science Advances: its broad STEM scope, its interest in cross-disciplinary research, and the offering of fee waivers. While we welcome the commitment of the Association to open access, we are also deeply concerned with the specific approach. Herein, we outline a number of suggestions that are in line with both the current direction that scholarly publishing is taking and the needs expressed by the open access community, which this journal aims to serve.
    BibTeX
    @article{Tennant2014,
      author = {Tennant, Jonathan P. and Poisot, Timoth{\'{e}}e and Kubke, M Fabiana and {et al.}},
      title = {{Open Letter to The American Association for the Advancement of Science}},
      journal = {The Winnower},
      year = {2014},
      volume = {2},
      pages = {e140813.35294},
      access = {Open Access},
      doi = {10.15200/winn.140813.35294},
      etal = {and Fran{\c{c}}ois Michonneau and Michael P. Taylor and Graham Steel and J{\'{e}}r{\'{e}}my Anquetin and Emily Coyte and Benjamin Schwessinger and Erin C. McKiernan and Tom Pollard and Aimee Eckert and Liz Allen and Dalmeet Singh Chawla and Elizabeth Silva and Nicholas Gardner and Nathan Cantley and John Dupuis and Christina Pikas and Amy Buckland and Lenny Teytelman and Zen Faulkes and Robert J. Gay and Peter T.B. Brett and Anders Eklund and Johannes Bj\"{o}rk and William Gunn and Philippe Desjardins-Proulx and Joshua M. Nicholson and Scott Edmunds and Steven Ray Wilson and Stuart Buck and B. Arman Aksoy and Nazeefa Fatima and Ross Mounce and Heather Piwowar and Avinash Thirumalai and Jason Priem and Clayton Aldern and Marcus D. Hanwell and Kristen L. Marhaver and David Michael Roberts and Brian Hole and Alexander Grossmann and David L. Vaux and John Murtagh and Alecia Carter and Alex O. Holcombe and Ignacio Torres Aleman and Sarah Molloy and John Lamp and Matthew Todd and Anusha Seneviratne and Guido Guidotti and Joseph McArthur and Carlos H. Grohmann and Jan de Leeuw and Jung H. Choi and Ernesto Priego and Brian Pasley and Stacy Konkiel and Elizabeth HB Hellen and Raphael Levy and Paul Coxon and Nitika Pant Pai and David Carroll and Jacinto D{\'{a}}vila and Marco Arieli Herrera-Valdez and Juan Pablo Alperin and Jan P. de Ruiter and Xianwen Chen and Jeanette Hatherill and Katharine Mullen and Pedro Bekinschtein and Quentin Groom and Karen Meijer-Kline and Pietro Gatti-Lafranconi and Jeffrey Hollister and Lachlan Coin and MooYoung Choi and Oscar Patterson-Lomba and Rowena Ball and Daniel Swan and Stephen Curry and Abigail Noyce and Jordan Ward and Ben Meghreblian and Ethan P. White and Sean R. Mulcahy and Sibele Fausto and Lorena A. Barba and Ed Trollope and Stephen Beckett and Andrew D. Steen and Mari Sarv and Noam Ross and Erika Amir and Martin Paul Eve and Franco Cecchi and Jason B. Colditz and Philip Spear and Mythili Menon and Matthew Clapham and Karl W. Broman and Graham Triggs and Tom Crick and Diano F. Marrone and Joseph Kraus and Steven Buyske and Gavin Simpson and Colleen Morgan and Kara Woo},
      kind = {journal},
      publisher = {The Winnower, {LLC}},
      timestamp = {2020-12-30-12-38},
      url = {http://dx.doi.org/10.15200/winn.140813.35294}
    }
    
    DOI

  • Henrique-Pinto, R., Janasi, V. de A., Carvalho, B. B., Calado, B. de O., & Grohmann, C. H. 2014. Integrated geological map of the São Roque Domain, North of São Paulo City – Brazil. Journal of Maps, 10(3): 434–439.
    Abstract
    The São Roque Domain has an extensive geological cartographic base that began in the nineteenth century with the works performed by the Geographic and Geological Commission of São Paulo Province. The first more detailed geological maps of geological substrate of the São Paulo city and neighboring areas were executed in the decades of 1940–1950, and culminated in the integrated maps by José Moacyr Vianna Coutinho published in the 1970s. As part of a systematic geological mapping campaign led by PRÓ-MINÉRIO, most of the São Roque Domain was mapped at 1:50,000 scales; these maps, and others at the same or more detailed scale published mostly in the 1980s, are only available in unpublished academic theses and reports. This article presents an integrated map of most of the São Roque Domain based on all the available maps and some new stratigraphic and geochronological data that appeared in recent local literature.
    BibTeX
    @article{Henrique-Pinto2014,
      author = {{Henrique-Pinto}, Renato and Janasi, Valdecir de Assis and Carvalho, Bruna Borges and Calado, Bruno de Oliveira and Grohmann, Carlos Henrique},
      title = {{Integrated geological map of the São Roque Domain, North of São Paulo City – Brazil}},
      journal = {Journal of Maps},
      year = {2014},
      volume = {10},
      number = {3},
      pages = {434-439},
      access = {Open Access},
      doi = {10.1080/17445647.2014.883338},
      eprint = {http://www.tandfonline.com/doi/pdf/10.1080/17445647.2014.883338},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-38},
      url = {http://dx.doi.org/10.1080/17445647.2014.883338}
    }
    
    DOI

2013

  • Grohmann, C. H., & Miliaresis, G. C. 2013. Geological applications of digital terrain analysis. International Journal of Geographical Information Science, 27(7): 1403–1404.
    Abstract
    Geologic terrain analysis includes, among others, the recognition and monitoring of landslide prone areas, evaluation of tectonic and fluvial processes in an attempt to estimate natural hazards, and evaluation of terrain suitability for engineering project design. Geologic terrain analysis is benefited from modern digital elevation models, landcover and multi-temporal biophysical data availability, while a variety of quantitative techniques have been developed to automate its processing. In this volume, the modern advances in the
    field of geological terrain analysis are presented, while emphasis is given to the quantitative analysis of modern datasets. Five case studies are presented
    BibTeX
    @article{Grohmann2013ijgis,
      author = {Grohmann, C. H. and Miliaresis, G. C.},
      title = {Geological applications of digital terrain analysis},
      journal = {International Journal of Geographical Information Science},
      year = {2013},
      volume = {27},
      number = {7},
      pages = {1403-1404},
      access = {Paywalled},
      doi = {10.1080/13658816.2013.772617},
      eprint = {http://www.tandfonline.com/doi/pdf/10.1080/13658816.2013.772617},
      kind = {journal},
      owner = {guano},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/HDM87},
      timestamp = {2020-12-30-13-55},
      url = {http://dx.doi.org/10.1080/13658816.2013.772617}
    }
    
    DOI Postprint

  • Grohmann, C. H., & Sawakuchi, A. O. 2013. Influence of cell size on volume calculation using digital terrain models: A case of coastal dune fields. Geomorphology, 180-181(1): 130–136.
    Abstract
    In this work, we analyze how variation in cell size influences the volume calculated from digital terrain models (DTMs) derived from a LiDAR (light detection and ranging) survey in two coastal Late Holocene dune fields in southern Brazil. Cell size varied from 1 to 100m. RMSE (root mean square error) of the resampled DTMs from the original LiDAR (with 0.5m resolution) increases linearly with cell size, while R2 (coefficient of determination) decreases following a second-order trend. The volume does not show simple linear or exponential behavior, but fluctuates with positive and negative deviations from the original DTM. This can be explained by a random factor in the position of the cell with regard to landforms and a relationship between cell and landform size, wherein a small change in cell size can lead to an under- or overestimation of volume. The ASTER GDEM (global digital elevation model) and X-SAR SRTM (Shuttle Radar Topography Mission) 1″ digital elevation models (DEMs) were not considered viable volume sources due to large deviations from the reference data, either as a consequence of noise in the SRTM X-SAR data or lack of bias elevation correction to a common reference base in the GDEM processing chain. Volumes from a 3-arcsec SIR-C SRTM deviated around ±5% from the reference data and are considered suitable input for numerical simulations of Quaternary dune field evolution models because these values should be within the expected range of sediment volume changes over hundreds to millions of years.
    BibTeX
    @article{Grohmann2013gmorph,
      author = {Grohmann, C. H. and Sawakuchi, A. O},
      title = {{Influence of cell size on volume calculation using digital terrain models: A case of coastal dune fields}},
      journal = {Geomorphology},
      year = {2013},
      volume = {180-181},
      number = {1},
      pages = {130-136},
      issn = {0169-555X},
      access = {Paywalled},
      doi = {10.1016/j.geomorph.2012.09.012},
      keywords = {Coastal dune field, Quaternary, LiDAR, X-SAR SRTM, SIR-C SRTM, ASTER GDEM},
      kind = {journal},
      owner = {guano},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/PR7UM},
      timestamp = {2020-12-30-12-47},
      url = {http://dx.doi.org/10.1016/j.geomorph.2012.09.012}
    }
    
    DOI Postprint

2012

  • Simões, M. G., Quaglio, F., Warren, L. V., Anelli, L. E., Stone, P., Riccomini, C., Grohmann, C. H., & Chamani, M. A. C. 2012. Permian non-marine bivalves of the Falkland Islands and their palaeoenvironmental significance. Alcheringa: An Australasian Journal of Palaeontology, 36(4): 543–554.
    Abstract
    We describe the occurrence of non-marine bivalves in exposures of the Middle Permian (Capitanian) Brenton Loch Formation on the southern shore of Choiseul Sound, East Falklands. The bivalves are associated with ichnofossils and were collected from a bed in the upper part of the formation, within a 25 cm thick interval of dark siltstones and mudstones with planar lamination, overlain by massive sandstones. The shells are articulated, with the valves either splayed open or closed. At the top of the succession, mudstone beds nearly 1.5 m above the bivalve-bearing layers yielded well-preserved Glossopteris sp. cf. G. communis leaf fossils. The closed articulated condition of some shells indicates preservation under high sedimentation rates with low residence time of bioclasts at the sediment/water interface. However, the presence of specimens with splayed shells is usually correlated to the slow decay of the shell ligament in oxygen-deficient bottom waters. The presence of complete carbonized leaves of Glossopteris associated with the bivalve-bearing levels also suggests a possibly dysoxic-anoxic bottom environment. Overall, our data suggest that the bivalves were preserved by abrupt burial, possibly by distal sediment flows into a Brenton Loch lake, and may represent autochthonous to parautochthonous fossil accumulations. The shells resemble those of anthracosiids and are herein assigned to Palaeanodonta sp. aff. P. dubia, a species also found in the Permian succession of the Karoo Basin, South Africa. Our results confirm that (a) the true distributions in space and time of all Permian non-marine (freshwater) bivalves are not yet well known, and (b) there is no evidence for marine conditions in the upper part of the Brenton Loch Formation.
    BibTeX
    @article{Simoes2012,
      author = {Sim\~{o}es, Marcello G. and Quaglio, Fernanda and Warren, Lucas V. and Anelli, Luiz E. and Stone, Philip and Riccomini, Claudio and Grohmann, Carlos H. and Chamani, Marlei A.C.},
      title = {{Permian non-marine bivalves of the Falkland Islands and their palaeoenvironmental significance}},
      journal = {Alcheringa: An Australasian Journal of Palaeontology},
      year = {2012},
      volume = {36},
      number = {4},
      pages = {543-554},
      access = {Paywalled},
      doi = {10.1080/03115518.2012.688682},
      eprint = {http://www.tandfonline.com/doi/pdf/10.1080/03115518.2012.688682},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-47},
      url = {http://dx.doi.org/10.1080/03115518.2012.688682}
    }
    
    DOI

  • Grohmann, C. H., & Riccomini, C. 2012. Análise digital de terreno e evolução de longo-termo de relevo do centro-leste brasileiro. Geologia USP. Série Científica, 12: 129–150.
    Abstract
    As diversas teorias geomorfológicas para evolução do relevo em longo-termo (da ordem de dezenas de milhões de anos) contemplam a existência de superfícies de aplainamento, formadas pela ação contínua dos agentes erosivos/deposicionais em períodos de quiescência tectônica e reconhecíveis como extensas áreas de relevo muito suave perturbadas localmente por elevações residuais, ou pela aparente concordância altimétrica dos divisores de águas de uma região. Apesar de passadas várias décadas desde a publicação das principais teorias sobre evolução das formas de relevo, a validade desses modelos ainda é palco de discussão. Neste trabalho são apresentados estudos relativos à compartimentação do relevo, em escala regional, da região centro-leste brasileira. As análises foram focadas em análise digital de terreno, com processamento e integração de dados em Sistema de Informações Geográficas, visando a extração e caracterização de variáveis relativas à superfície topográfica e a compilação e tratamento matemático de dados termocronológicos e geofísicos. Os resultados obtidos foram interpretados tendo em vista o contexto geológico e as teorias de evolução do relevo em longo-termo. A integração entre dados morfométricos, termocronológicos e geofísicos não suporta a validade do uso de superfícies aplainadas em correlações estratigráficas de âmbito regional.
    BibTeX
    @article{Grohmann2012geousp,
      author = {Grohmann, Carlos Henrique and Riccomini, Claudio},
      title = {{An\'{a}lise digital de terreno e evolu\c c\~{a}o de longo-termo de relevo do centro-leste brasileiro}},
      journal = {{Geologia USP. S\'{e}rie Cient\'{i}fica}},
      year = {2012},
      volume = {12},
      pages = {129 - 150},
      month = aug,
      issn = {1519-874X},
      access = {Open Access},
      doi = {10.5327/Z1519-874X2012000200009},
      kind = {journal},
      language = {pt},
      owner = {guano},
      publisher = {scieloppegeo},
      timestamp = {2020-12-30-12-42},
      url = {http://dx.doi.org/10.5327/Z1519-874X2012000200009}
    }
    
    DOI

2011

  • Grohmann, C. H., Smith, M. J., & Riccomini, C. 2011. Multiscale Analysis of Topographic Surface Roughness in the Midland Valley, Scotland. Geoscience and Remote Sensing, IEEE Transactions on, 49(4): 1200–1213.
    Abstract
    Surface roughness is an important geomorphological variable which has been used in the Earth and planetary sciences to infer material properties, current/past processes, and the time elapsed since formation. No single definition exists; however, within the context of geomorphometry, we use surface roughness as an expression of the variability of a topographic surface at a given scale, where the scale of analysis is determined by the size of the landforms or geomorphic features of interest. Six techniques for the calculation of surface roughness were selected for an assessment of the parameter’s behavior at different spatial scales and data-set resolutions. Area ratio operated independently of scale, providing consistent results across spatial resolutions. Vector dispersion produced results with increasing roughness and homogenization of terrain at coarser resolutions and larger window sizes. Standard deviation of residual topography highlighted local features and did not detect regional relief. Standard deviation of elevation correctly identified breaks of slope and was good at detecting regional relief. Standard deviation of slope (SDslope) also correctly identified smooth sloping areas and breaks of slope, providing the best results for geomorphological analysis. Standard deviation of profile curvature identified the breaks of slope, although not as strongly as SDslope, and it is sensitive to noise and spurious data. In general, SDslope offered good performance at a variety of scales, while the simplicity of calculation is perhaps its single greatest benefit.
    BibTeX
    @article{Grohmann2011ieee,
      author = {Grohmann, C. H. and Smith, M. J. and Riccomini, C.},
      title = {{Multiscale Analysis of Topographic Surface Roughness in the Midland Valley, Scotland}},
      journal = {Geoscience and Remote Sensing, IEEE Transactions on},
      year = {2011},
      volume = {49},
      number = {4},
      pages = {1200--1213},
      access = {Paywalled},
      doi = {10.1109/TGRS.2010.2053546},
      kind = {journal},
      owner = {guano},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/2DSJN},
      timestamp = {2020-12-30-12-45},
      url = {http://dx.doi.org/10.1109/TGRS.2010.2053546}
    }
    
    DOI Postprint

  • Grohmann, C. H., Riccomini, C., & Chamani, M. A. C. 2011. Regional scale analysis of landform configuration with base-level (isobase) maps. Hydrology and Earth System Sciences, 15(5): 1493–1504.
    Abstract
    Base-level maps (or "isobase maps", as originally defined by Filosofov, 1960), express a relationship between valley order and topography. The base-level map can be seen as a "simplified" version of the original topographic surface, from which the "noise" of the low-order stream erosion was removed. This method is able to identify areas with possible tectonic influence even within lithologically uniform domains. Base-level maps have been recently applied in semi-detail scale (e.g., 1:50 000 or larger) morphotectonic analysis. In this paper, we present an evaluation of the method’s applicability in regional-scale analysis (e.g., 1:250 000 or smaller). A test area was selected in northern Brazil, at the lower course of the Araguaia and Tocantins rivers. The drainage network extracted from SRTM30_PLUS DEMs with spatial resolution of approximately 900 m was visually compared with available topographic maps and considered to be compatible with a 1:1,000 000 scale. Regarding the interpretation of regional-scale morphostructures, the map constructed with 2nd and 3rd-order valleys was considered to present the best results. Some of the interpreted base-level anomalies correspond to important shear zones and geological contacts present in the 1:5 000 000 Geological Map of South America. Others have no correspondence with mapped Precambrian structures and are considered to represent younger, probably neotectonic, features. A strong E-W orientation of the base-level lines over the inflexion of the Araguaia and Tocantins rivers, suggest a major drainage capture. A N-S topographic swath profile over the Tocantins and Araguaia rivers reveals a topographic pattern which, allied with seismic data showing a roughly N-S direction of extension in the area, lead us to interpret this lineament as an E-W, southward-dipping normal fault. There is also a good visual correspondence between the base-level lineaments and geophysical anomalies. A NW-SE lineament in the southeast of the study area partially corresponds to the northern border of the Mosquito lava field, of Jurassic age, and a NW-SE lineament traced in the northeastern sector of the study area can be interpreted as the Picos-Santa Inês lineament, identifiable in geophysical maps but with little expression in hypsometric or topographic maps.
    BibTeX
    @article{Grohmann2011hess,
      author = {Grohmann, C. H. and Riccomini, C. and Chamani, M. A. C.},
      title = {{Regional scale analysis of landform configuration with base-level (isobase) maps}},
      journal = {Hydrology and Earth System Sciences},
      year = {2011},
      volume = {15},
      number = {5},
      pages = {1493--1504},
      access = {Open Access},
      doi = {10.5194/hess-15-1493-2011},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-42},
      url = {http://dx.doi.org/10.5194/hess-15-1493-2011}
    }
    
    DOI

2010

  • Campanha, G. A. C., Warren, L. V., Boggiani, P. C., Grohmann, C. H., & Cáceres, A. A. 2010. Structural Analysis of the Itapucumí Group in the Vallemí Region, Northern Paraguay: Evidence of a New Brasiliano/Pan-African Mobile Belt. Journal of South American Earth Sciences, 30: 1–11.
    Abstract
    The Neoproterozoic (Ediacaran) Itapucumí Group in northern Paraguay is composed of carbonate and siliciclastic rocks, including ooid grainstones, marls, shales and sandstones, containing Cloudina fossils in the eastern region. It is almost undeformed over the Rio Apa Cratonic Block but shows a strong deformational pattern at its western edge. A detailed structural analysis of the Itapucumí Group was conducted in the Vallemí Mine, along with a regional survey in other outcrops downstream in the Paraguay River and in the San Alfredo, Cerro Paiva and Sargento José E. López regions. In the main Vallemí quarry, the structural style is characterized by an axial-plane slaty cleavage in open to isoclinal folds, sometimes overturned, associated with N–S trending thrust faults and shear zones of E-vergence and with a low-grade chlorite zone metamorphism. The structural data presented here are compatible with the hypothesis of a newly recognized mobile belt on the western side of the Rio Apa Cratonic Block, with opposite vergence to that of the Paraguay Mobile Belt in Brazil. Both belts are related to the Late Brasiliano/Pan-African tectonic cycle with a Lower Cambrian deformation and metamorphism age. The deformation could be due to the late collision of the Amazonian Craton with the remainder of Western Gondwana or to the western active plate boundary related to the Pampean Belt. The structural and lithologic differences between the western Itapucumí Group in the Vallemí and Paraguay River region and the eastern region, near San Alfredo and Cerro Paiva, suggest that this group could be divided into two lithostratigraphic units, but more stratigraphic and geochronological analyses are required to confirm this possibility.
    BibTeX
    @article{Campanha2010jsaes,
      author = {Campanha, G. A. C. and Warren, L. V. and Boggiani, P. C. and Grohmann, C. H. and C\'aceres, A. A.},
      title = {{Structural Analysis of the Itapucum\'{i} Group in the Vallem\'{i} Region, Northern Paraguay: Evidence of a New Brasiliano/Pan-African Mobile Belt}},
      journal = {Journal of South American Earth Sciences},
      year = {2010},
      volume = {30},
      pages = {1-11},
      access = {Paywalled},
      doi = {10.1016/j.jsames.2010.04.001},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-47},
      url = {http://dx.doi.org/10.1016/j.jsames.2010.04.001}
    }
    
    DOI

  • Rodrigues, S. W. O., Archanjo, C. J., & Grohmann, C. H. 2010. Quantificação da deformac cão finita nos metagranitóides Cariris Velhos na Região de Alagoa Grande (PB). Geologia USP. Série Científica, 10: 57–78.
    Abstract
    Os Metagranitoides Cariris Velhos são considerados como uma das principais associações litológicas da Zona Transversal (Província Borborema - NE do Brasil). A utilização de imagens brutas e tratadas digitalmente de afloramentos dos Metagranitoides Cariris Velhos na obtenção do elipsoide de deformação foi avaliada com o emprego dos métodos do tensor de inércia e interceptos. Os resultados obtidos nas diferentes técnicas utilizadas apresentam elipsoides com geometria e parâmetros de forma semelhantes entre si, mas com grau de anisotropias diferentes. As orientações dos eixos dos elipsoides obtidos são condizentes com as estruturas geológicas observadas em campo, como a foliação principal e a lineação mineral. Entre as características observadas nos elipsoides de deformação obtidos nesse trabalho, destacam-se a forte orientação do eixo C (associado ao polo da foliação) e o predomínio de elipsoides associados a tramas planares e plano-lineares (predomínio de achatamento na deformação). A deformação observada nos Metagranitoides Cariris Velhos é associada ao desenvolvimento das zonas de cisalhamento brasilianas regionais desenvolvidas sob esforços transpressivos.
    BibTeX
    @article{Rodrigues2010geousp,
      author = {Rodrigues, S. W. O. and Archanjo, C. J. and Grohmann, C. H.},
      title = {{Quantifica\c c\~{a}o da deformac c\~{a}o finita nos metagranitóides Cariris Velhos na Regi\~{a}o de Alagoa Grande (PB)}},
      journal = {Geologia USP. S\'erie Cient\'ifica},
      year = {2010},
      volume = {10},
      pages = {57-78},
      access = {Open Access},
      doi = {10.5327/Z1519-874X2010000300005},
      kind = {journal},
      owner = {guano},
      timestamp = {2020-12-30-12-44},
      url = {http://dx.doi.org/10.5327/Z1519-874X2010000300005}
    }
    
    DOI

2009

  • Grohmann, C. H., & Riccomini, C. 2009. Comparison of roving-window and search-window techniques for characterising landscape morphometry. Computers & Geosciences, 35: 2164–2169.
    Abstract
    The intent of this paper is to compare both techniques in a multi-scale study of geomorphometry, in central-eastern Brazil. The study area is limited by coordinates 0 and 26S latitude and 34W and 56W longitude, with approximately 4:900:000 km .
    BibTeX
    @article{Grohmann2009cageo,
      author = {Grohmann, C. H. and Riccomini, C.},
      title = {{Comparison of roving-window and search-window techniques for characterising landscape morphometry}},
      journal = {Computers \& Geosciences},
      year = {2009},
      volume = {35},
      pages = {2164-2169},
      access = {Paywalled},
      doi = {10.1016/j.cageo.2008.12.014},
      kind = {journal},
      owner = {guano},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/X6BRZ},
      timestamp = {2020-12-30-12-50},
      url = {http://dx.doi.org/10.1016/j.cageo.2008.12.014}
    }
    
    DOI Postprint

2008

  • Grohmann, C. H., Riccomini, C., & Steiner, S. S. 2008. Aplicações dos modelo de elevação SRTM em geomorfologia. Revista Geográfica Acadêmica, 2: 73–83.
    Abstract
    A missão Shuttle Radar Topography Mission (SRTM) foi realizada para mapear o relevo da área continental da Terra com interferometria de radar entre 60o de latitude norte e 54o de latitude sul. A utilização de Modelos Digitais de Elevação (MDEs) em geomorfologia permite o cálculo de variáveis associadas ao relevo com rapidez e precisão. Neste artigo, apresenta-se uma visão geral de aplicações dos modelos de elevação SRTM em análises geomorfológicas realizadas em território brasileiro, bem como uma apreciação das limitações existentes e de perspectivas futuras.
    BibTeX
    @article{Grohmann2008rga,
      author = {Grohmann, C. H. and Riccomini, C. and Steiner, S. S.},
      title = {{Aplica\c c\~{o}es dos modelo de eleva\c c\~{a}o SRTM em geomorfologia}},
      journal = {Revista Geogr\'{a}fica Acad\^{e}mica},
      year = {2008},
      volume = {2},
      pages = {73--83},
      citeulike-article-id = {3375634},
      keywords = {srtm, geomorphology},
      kind = {journal},
      oalink = {https://revista.ufrr.br/rga/issue/viewIssue/176/3},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-12-30-12-52}
    }
    
    Download

  • Grohmann, C. H., & Steiner, S. S. 2008. SRTM resample with Short Distance-Low Nugget Kriging. International Journal of Geographical Information Science, 22(8): 895–906.
    Abstract
    The shuttle radar topography mission (SRTM), was flow on the space shuttle Endeavour in February 2000, with the objective of acquiring a digital elevation model of all land between 60° north latitude and 56° south latitude, using interferometric synthetic aperture radar (InSAR) techniques. The SRTM data are distributed at horizontal resolution of 1 arc‐second (∼30 m) for areas within the USA and at 3 arc‐second (∼90 m) resolution for the rest of the world. A resolution of 90 m can be considered suitable for the small or medium‐scale analysis, but it is too coarse for more detailed purposes. One alternative is to interpolate the SRTM data at a finer resolution; it will not increase the level of detail of the original digital elevation model (DEM), but it will lead to a surface where there is the coherence of angular properties (i.e. slope, aspect) between neighbouring pixels, which is an important characteristic when dealing with terrain analysis. This work intents to show how the proper adjustment of variogram and kriging parameters, namely the nugget effect and the maximum distance within which values are used in interpolation, can be set to achieve quality results on resampling SRTM data from 3” to 1”. We present for a test area in western USA, which includes different adjustment schemes (changes in nugget effect value and in the interpolation radius) and comparisons with the original 1” model of the area, with the national elevation dataset (NED) DEMs, and with other interpolation methods (splines and inverse distance weighted (IDW)). The basic concepts for using kriging to resample terrain data are: (i) working only with the immediate neighbourhood of the predicted point, due to the high spatial correlation of the topographic surface and omnidirectional behaviour of variogram in short distances; (ii) adding a very small random variation to the coordinates of the points prior to interpolation, to avoid punctual artifacts generated by predicted points with the same location than original data points and; (iii) using a small value of nugget effect, to avoid smoothing that can obliterate terrain features. Drainages derived from the surfaces interpolated by kriging and by splines have a good agreement with streams derived from the 1” NED, with correct identification of watersheds, even though a few differences occur in the positions of some rivers in flat areas. Although the 1” surfaces resampled by kriging and splines are very similar, we consider the results produced by kriging as superior, since the spline‐interpolated surface still presented some noise and linear artifacts, which were removed by kriging.
    BibTeX
    @article{Grohmann_2008ijgis,
      author = {Grohmann, C. H. and Steiner, S. S.},
      title = {{SRTM resample with Short Distance-Low Nugget Kriging}},
      journal = {International Journal of Geographical Information Science},
      year = {2008},
      volume = {22},
      number = {8},
      pages = {895--906},
      access = {Paywalled},
      citeulike-article-id = {3375636},
      doi = {10.1080/13658810701730152},
      keywords = {grass, kriging, srtm},
      kind = {journal},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/AMN2T},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-12-30-12-48},
      url = {http://dx.doi.org/10.1080/13658810701730152}
    }
    
    DOI Postprint

2007

  • Grohmann, C. H., Riccomini, C., & Alves, F. M. 2007. SRTM-based morphotectonic analysis of the Poços de Caldas Alkaline Massif, southeastern Brazil. Computers & Geosciences, 33: 10–19.
    Abstract
    An evaluation of SRTM 03″ data applicability in geomorphology and morphotectonic analysis is proposed, considering the morphometric parameters slope, aspect, surface roughness and isobase surface. The study area, in southeastern Brazil, comprises the Poços de Caldas Alkaline Massif, a 33km-diameter Late Cretaceous collapsed volcanic caldera. Morphometric indices evaluated showed the correlation of landscape within the massif with NE–SW and NW–SE structures, as well as landforms related with recent tectonic influence. DEM-derived drainage presented satisfactory results when compared to a 1:50,000 topographic map. SRTM 03″ proved to be a good resource for geomorphological analysis, up to the semi-detail scale.
    BibTeX
    @article{Grohmann2007cageo,
      author = {Grohmann, C. H. and Riccomini, C. and Alves, F. M.},
      title = {{SRTM-based morphotectonic analysis of the Po\c cos de Caldas Alkaline Massif, southeastern Brazil}},
      journal = {Computers \& Geosciences},
      year = {2007},
      volume = {33},
      pages = {10--19},
      access = {Paywalled},
      citeulike-article-id = {3375629},
      doi = {10.1016/j.cageo.2006.05.002},
      keywords = {grass, geomorphometry, isobase, srtm},
      kind = {journal},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/HZ4CT},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-12-30-12-46},
      url = {http://dx.doi.org/10.1016/j.cageo.2006.05.002}
    }
    
    DOI Postprint

2006

  • Grohmann, C. H. 2006. r.roughness - a new tool for morphometric analysis in GRASS. GRASS/OSGeo News, 4: 17–19.
    Abstract
    This article briefly describes r.roughness, a shell script written to calculate the surface roughness of raster surfaces.
    BibTeX
    @article{Grohmann2006grass,
      author = {Grohmann, C. H.},
      title = {{r.roughness - a new tool for morphometric analysis in GRASS}},
      journal = {GRASS/OSGeo News},
      year = {2006},
      volume = {4},
      pages = {17--19},
      citeulike-article-id = {3375617},
      keywords = {grass, roughness},
      kind = {journal},
      oalink = {http://grass.osgeo.org/newsletter/GRASS_OSGeo_News_vol4-roughness.pdf},
      owner = {guano},
      posted-at = {2008-10-04 23:59:49},
      timestamp = {2020-12-30-12-51}
    }
    
    Download

  • Grohmann, C. H. 2006. Resampling SRTM 03”-data with kriging. GRASS/OSGeo News, 4: 20–25.
    Abstract
    The purpose of this article is to present the steps necessary to improve the resolution of a DEM using variogram modelling and kriging, as well as a brief comparison of the results with those obtained with interpolation by Regularised Splines with Tension (RST).
    BibTeX
    @article{Grohmann2006srtm,
      author = {Grohmann, C. H.},
      title = {{Resampling SRTM 03''-data with kriging}},
      journal = {GRASS/OSGeo News},
      year = {2006},
      volume = {4},
      pages = {20--25},
      citeulike-article-id = {3375618},
      keywords = {grass, kriging, geostatistics},
      kind = {journal},
      oalink = {http://grass.osgeo.org/newsletter/GRASS_OSGeo_News_vol4-srtm.pdf},
      owner = {guano},
      posted-at = {2008-10-04 23:59:49},
      timestamp = {2020-12-30-12-51}
    }
    
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2005

  • Grohmann, C. H. 2005. Trend-surfaces analysis of morphometric parameters: A case study in southeastern Brazil. Computers & Geosciences, 31: 1005–1014.
    Abstract
    Trend-surface analysis was carried out on data from morphometric parameters isobase and hydraulic gradient. The study area, located in the eastern border of Quadrilátero Ferrífero, southeastern Brazil, presents four main geomorphological units, one characterized by fluvial dissection, two of mountainous relief, with a scarp of hundreds of meters of fall between them, and a flat plateau in the central portion of the fluvially dissected terrains. Morphometric maps were evaluated in GRASS-GIS and statistics were made on R statistical language, using the spatial package. Analysis of variance (ANOVA) was made to test the significance of each surface and the significance of increasing polynomial degree. The best results were achieved with sixth-order surface for isobase and second-order surface for hydraulic gradient. Shape and orientation of residual maps contours for selected trends were compared with structures inferred from several morphometric maps, and a good correlation is present.
    BibTeX
    @article{Grohmann2005cageo,
      author = {Grohmann, C. H.},
      title = {{Trend-surfaces analysis of morphometric parameters: A case study in southeastern Brazil}},
      journal = {Computers \& Geosciences},
      year = {2005},
      volume = {31},
      pages = {1005--1014},
      access = {Paywalled},
      citeulike-article-id = {3375619},
      doi = {10.1016/j.cageo.2005.02.011},
      keywords = {grass, geomathematics},
      kind = {journal},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/9VU72},
      posted-at = {2008-10-04 23:59:49},
      timestamp = {2020-12-30-12-46},
      url = {http://dx.doi.org/10.1016/j.cageo.2005.02.011}
    }
    
    DOI Postprint

2004

  • Grohmann, C. H. 2004. Morphometric analysis in Geographic Information Systems: applications of free software GRASS and R. Computers & Geosciences, 30: 1055–1067.
    Abstract
    Development and interpretation of morphometric maps are important tools in studies related to neotectonics and geomorphology; Geographic Information Systems (GIS) allows speed and precision to this process, but applied methodology will vary according to available tools and degree of knowledge of each researcher about involved software. A methodology to integrate GIS and statistics in morphometric analysis is presented for the most usual morphometric parameters—hypsometry, slope, aspect, swath profiles, lineaments and drainage density, surface roughness, isobase and hydraulic gradient. The GIS used was the Geographic Resources Analysis Support System (GRASS-GIS), an open-source project that offers an integrated environment for raster and vector analysis, image processing and maps/graphics creation. Statistical analysis of parameters can be carried out on R, a system for statistical computation and graphics, through an interface with GRASS that allows raster maps and points files to be treated as variables for analysis. The basic element for deriving morphometric maps is the digital elevation model (DEM). It can be interpolated from scattered points or contours, either in raster or vector format; it is also possible to use DEMs from NASA’s Shuttle Radar Topographic Mission, with 30m of ground resolution for the USA and 90m for other countries. Proposed methodology can be adapted according to necessities and available tools. The use of free and open-source tools guarantees access to everyone, and its increasing popularization opens new development perspectives in this research field.
    BibTeX
    @article{Grohmann2004cageo,
      author = {Grohmann, C. H.},
      title = {{Morphometric analysis in Geographic Information Systems: applications of free software GRASS and R}},
      journal = {Computers \& Geosciences},
      year = {2004},
      volume = {30},
      pages = {1055--1067},
      access = {Paywalled},
      citeulike-article-id = {3375621},
      doi = {10.1016/j.cageo.2004.08.002},
      keywords = {grass, geomorphometry},
      kind = {journal},
      post_earxiv = {https://dx.doi.org/10.17605/OSF.IO/6VX7C},
      posted-at = {2008-10-04 23:59:49},
      timestamp = {2020-12-30-12-46},
      url = {http://dx.doi.org/10.1016/j.cageo.2004.08.002}
    }
    
    DOI Postprint

  • Santos, L. P., Campos Neto, M. C., & Grohmann, C. H. 2004. Metamorphic path constrained by metapelitic rocks from the inner Aiuruoca-Andrelândia nappe, south of the São Francisco Craton, SE Brazil. Journal of South American Earth Sciences, 16: 725–741.
    Abstract
    A Nappe system south to southwest of the São Francisco Craton represents the southern extension of the Brası́lia belt and describes an inverted metamorphic pile of greenschist facies toward amphibolite facies. The Aiuruoca-Andrelândia nappe is one of the nappes of this system. The hind portion of the Aiuruoca-Andrelândia nappe, south of Caxambu and Aiuruoca (MG), consists of a structural-metamorphic domain transported toward the E-NE. There is a metamorphic transition, from the kyanite zone to kyanite and sillimanite coexistence, until the sillimanite zone. Metapelitic rocks preserve high-pressure parageneses (Rt–Ky–Grt–Ms–Bt–Pl–Qtz) and contain retrograde eclogitic rocks. Sil–Pl–Qtz coronitic intergrowths around garnets are common decompressive textures. Kyanite schists register the Pmax of 11kbar at 660 °C and define a decompressive path until 6–7.5kbar at 650 °C. These P–T conditions represent the equilibrium in S2 schistosity (amphibolite facies) and the beginning of the cooling path in the Ky–Sil transition. The decompressive path suggests an extrusional process, immediately after burying at about 60 km. Exhumation controlled by convergent events, related to the São Francisco Plate subduction and tectonic erosion, took these units, isothermally, to higher levels (20–33 km). Later, the metamorphic path shifted toward near-isobaric cooling.
    BibTeX
    @article{Santos2004jsaes,
      author = {Santos, L. P. and {Campos Neto}, M. C. and Grohmann, C. H.},
      title = {{Metamorphic path constrained by metapelitic rocks from the inner Aiuruoca-Andrel\^{a}ndia nappe, south of the S\~{a}o Francisco Craton, SE Brazil}},
      journal = {Journal of South American Earth Sciences},
      year = {2004},
      volume = {16},
      pages = {725--741},
      access = {Paywalled},
      citeulike-article-id = {3375963},
      doi = {10.1016/j.jsames.2003.12.006},
      kind = {journal},
      posted-at = {2008-10-05 00:00:03},
      timestamp = {2020-12-30-12-46}
    }
    
    DOI

 
 

Book Chapters

2020

  • Cracraft, J., Camila Ribas, C., d’Horta, F. M., Bates, J., Almeida, R. P., Aleixo, A., Boubli, J. P., Campbell, K. E., Cruz, F. W., Ferreira, M., Fritz, S. C., Grohmann, C. H., Latrubesse, E. M., Lohmann, L. G., Musher, L. J., Nogueira, A., Sawakuchi, A. O., & Baker, P. 2020. Neotropical Diversification: Patterns and Processes. In V. Rull & A. C. Carnaval (Eds.), (pp. 225–244). Cham: Springer International Publishing.
    BibTeX
    @inbook{Cracraft2020,
      chapter = {{The Origin and Evolution of Amazonian Species Diversity}},
      pages = {225--244},
      title = {{Neotropical Diversification: Patterns and Processes}},
      publisher = {Springer International Publishing},
      year = {2020},
      author = {Cracraft, J. and Camila Ribas, C. and d'Horta, F. M. and Bates, J. and Almeida, R. P. and Aleixo, A. and Boubli, J. P. and Campbell, K. E. and Cruz, F. W. and Ferreira, M. and Fritz, S. C. and Grohmann, C. H. and Latrubesse, E. M. and Lohmann, L. G. and Musher, L. J. and Nogueira, A. and Sawakuchi, A. O. and Baker, P.},
      editor = {Rull, Valent{\'i} and Carnaval, Ana Carolina},
      address = {Cham},
      isbn = {978-3-030-31167-4},
      access = {Paywalled},
      doi = {10.1007/978-3-030-31167-4_10},
      timestamp = {2020-12-30},
      url = {https://doi.org/10.1007/978-3-030-31167-4_10}
    }
    
    DOI

2019

  • Viana*, C. D., A., E., Grohmann, C. H., P., M. J., & Campanha, G. A. C. 2019. Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers: Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019). In S. A. B. Fontoura, R. J. Rocca, & J. P. Mendoza (Eds.), (pp. 560–566). Foz do Iguassu, Brazil: CRC Press.
    BibTeX
    @inbook{Viana2019isrm1,
      chapter = {{SfM-MVS digital models applied to rock surface roughness}},
      pages = {560-566},
      title = {Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers: Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019)},
      publisher = {CRC Press},
      year = {2019},
      author = {Viana*, C. D. and A., Endlein and Grohmann, C. H. and P., Monticelli J. and Campanha, G. A. C.},
      editor = {Fontoura, S. A. B. and Rocca, R. J. and Mendoza, J. P.},
      address = {Foz do Iguassu, Brazil},
      month = sep,
      isbn = {978-0-367-42284-4},
      access = {Paywalled},
      doi = {10.1201/9780367823184},
      timestamp = {2020-12-30},
      url = {https://doi.org/10.1201/9780367823184}
    }
    
    DOI

  • Viana*, C. D., Grohmann, C. H., P., M. J., Garcia*, G. P. B., W., A. R., Cacciari, P. P., & Futai, M. M. 2019. Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers: Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019). In S. A. B. Fontoura, R. J. Rocca, & J. P. Mendoza (Eds.), (pp. 3604–3611). Foz do Iguassu, Brazil: CRC Press.
    BibTeX
    @inbook{Viana2019isrm2,
      chapter = {{Slope stability assessment based on a digital outcrop model: A case-study at Jardim Garcia quarry}},
      pages = {3604-3611},
      title = {Rock Mechanics for Natural Resources and Infrastructure Development - Full Papers: Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering (ISRM 2019)},
      publisher = {CRC Press},
      year = {2019},
      author = {Viana*, C. D. and Grohmann, C. H. and P., Monticelli J. and Garcia*, G. P. B. and W., Albuquerque*. R. and Cacciari, P. P. and Futai, M. M.},
      editor = {Fontoura, S. A. B. and Rocca, R. J. and Mendoza, J. P.},
      address = {Foz do Iguassu, Brazil},
      month = sep,
      isbn = {978-0-367-42284-4},
      access = {Paywalled},
      doi = {10.1201/9780367823184},
      timestamp = {2020-12-30},
      url = {https://doi.org/10.1201/9780367823184}
    }
    
    DOI

2014

  • Grohmann, C. H., & Hargitai, H. 2014. Surface Roughness. In Encyclopedia of Planetary Landforms (pp. 1–4). Springer New York.
    BibTeX
    @inbook{Grohmann2014encyclopedia,
      pages = {1-4},
      title = {{Surface Roughness}},
      publisher = {Springer New York},
      year = {2014},
      author = {Grohmann, C. H. and Hargitai, Henrik},
      access = {Paywalled},
      booktitle = {Encyclopedia of Planetary Landforms},
      doi = {10.1007/978-1-4614-9213-9_633-1},
      language = {English},
      timestamp = {2020-08-04},
      url = {http://dx.doi.org/10.1007/978-1-4614-9213-9_633-1}
    }
    
    DOI

2008

  • Riccomini, C., Grohmann, C. H., Sant’Anna, L. G., & Hiruma, S. T. 2008. O geógrafo Aziz Nacib Ab’Sáber. In M. C. Modenesi-Gauttieri, A. Bartorelli, M. A. L. Lisboa, & V. Mantesso Neto (Eds.), (pp. 157–169). Becca.
    BibTeX
    @inbook{Riccomini2008aziz,
      chapter = {{A captura das cabeceiras do Rio Tiet\^{e} pelo Rio Para\'{i}ba do Sul}},
      pages = {157--169},
      title = {{O ge\'{o}grafo Aziz Nacib Ab'S\'{a}ber}},
      publisher = {Becca},
      year = {2008},
      author = {Riccomini, C. and Grohmann, C. H. and {Sant'Anna}, L. G. and Hiruma, S. T.},
      editor = {{Modenesi-Gauttieri}, M. C. and Bartorelli, A. and Lisboa, M. A. L. and {Mantesso Neto}, V.},
      citeulike-article-id = {3375924},
      posted-at = {2008-10-05 00:00:02},
      timestamp = {2020-12-30}
    }
    

 
 

Selected Abstracts/Conference Papers

(This list changes constantly. Check the Bib/RIS file to see all abstracts. )

2021

  • Dias, H. C., Hölbling, D., & Grohmann, C. H. 2021. Landslide inventory mapping in Brazil: Status and challenges. In SCG-XIII International Symposium on Landslides. Cartagena, Colombia.
    BibTeX
    @inproceedings{Dias2021isl,
      author = {Dias, H. C. and H{\"o}lbling, D. and Grohmann, C. H.},
      title = {{Landslide inventory mapping in Brazil: Status and challenges}},
      booktitle = {SCG-XIII International Symposium on Landslides},
      year = {2021},
      address = {Cartagena, Colombia},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    

2019

  • Garcia*, G. P. B., Gomes*, E. B., Viana*, C. D., & Grohmann, C. H. 2019. Comparing Terrestrial Laser Scanner and UAV-based photogrammetry to generate a landslide DEM. In XIX Brazilian Symposium on Remote Sensing (Vol. 17, p. 95863). Santos, SP.: Galoa.
    BibTeX
    @inproceedings{Garcia2019sbsr,
      author = {Garcia*, G. P. B and Gomes*, E. B. and Viana*, C. D. and Grohmann, C. H.},
      title = {{Comparing Terrestrial Laser Scanner and UAV-based photogrammetry to generate a landslide DEM}},
      booktitle = {XIX Brazilian Symposium on Remote Sensing},
      year = {2019},
      volume = {17},
      pages = {95863},
      address = {Santos, SP.},
      publisher = {Galoa},
      note = {ISBN: 978-85-17-00097-3},
      oalink = {https://proceedings.science/sbsr-2019/papers/comparing-terrestrial-laser-scanner-and-uav-based-photogrammetry-to-generate-a-landslide-dem},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    
    Download

  • Grohmann, C. H., Viana*, C. D., Garcia*, G. P. B., Albuquerque*, R. W., Barale*, F., & Ferretti*, F. A. 2019. Semi-Automatic UAV-based SfM survey of vertical surfaces. In XIX Brazilian Symposium on Remote Sensing (Vol. 17, p. 95586). Santos, SP.: Galoa.
    BibTeX
    @inproceedings{Grohmann2019sbsr,
      author = {Grohmann, C. H. and Viana*, C. D. and Garcia*, G. P. B and Albuquerque*, R. W. and Barale*, F. and Ferretti*, F. A.},
      title = {{Semi-Automatic UAV-based SfM survey of vertical surfaces}},
      booktitle = {XIX Brazilian Symposium on Remote Sensing},
      year = {2019},
      volume = {17},
      pages = {95586},
      address = {Santos, SP.},
      publisher = {Galoa},
      note = {ISBN: 978-85-17-00097-3},
      oalink = {https://proceedings.science/sbsr-2019/papers/semi-automatic-uav-based-sfm-survey-of-vertical-surfaces},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    
    Download

  • Barale*, F., & Grohmann, C. H. 2019. Photoscan x COLMAP: comparação entre DEMs gerados por Structure from Motion–Multi-View Stereo. In XIX Brazilian Symposium on Remote Sensing (Vol. 17, p. 95942). Santos, SP.: Galoa.
    BibTeX
    @inproceedings{Barale2019sbsr,
      author = {Barale*, F. and Grohmann, C. H.},
      title = {{Photoscan x COLMAP: comparação entre DEMs gerados por Structure from Motion–Multi-View Stereo}},
      booktitle = {XIX Brazilian Symposium on Remote Sensing},
      year = {2019},
      volume = {17},
      pages = {95942},
      address = {Santos, SP.},
      publisher = {Galoa},
      note = {ISBN: 978-85-17-00097-3},
      oalink = {https://proceedings.science/sbsr-2019/papers/photoscan-x-colmap--comparacao-entre-dems-gerados-por-structure-from-motion--multi-view-stereo},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    
    Download

  • Albuquerque*, R. W., Ferreira, M. E., Girão, V. J., Balieiro, C. P., Mansur, H., Costa, J. V. S., & Grohmann, C. H. 2019. Comparação de RPAS e TOPODATA no mapeamento de regiões declivosas previstas no Cadastro Ambiental Rural. In XIX Brazilian Symposium on Remote Sensing (Vol. 17, p. 96426). Santos, SP.: Galoa.
    BibTeX
    @inproceedings{Albuquerque2019sbsr,
      author = {Albuquerque*, R. W. and Ferreira, M. E. and Girão, V. J. and Balieiro, C. P. and Mansur, H. and Costa, J. V. S. and Grohmann, C. H.},
      title = {{Comparação de RPAS e TOPODATA no mapeamento de regiões declivosas previstas no Cadastro Ambiental Rural}},
      booktitle = {XIX Brazilian Symposium on Remote Sensing},
      year = {2019},
      volume = {17},
      pages = {96426},
      address = {Santos, SP.},
      publisher = {Galoa},
      note = {ISBN: 978-85-17-00097-3},
      oalink = {https://proceedings.science/sbsr-2019/papers/comparacao-de-rpas-e-topodata-no-mapeamento-de-regioes-declivosas-previstas-no-cadastro-ambiental-rural},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    
    Download

  • Santos*, L. F., & Grohmann, C. H. 2019. Processamento fotogramétrico digital por Structure from Motion de imagens obtidas em voos de diferentes alturas sobre o solo. In XIX Brazilian Symposium on Remote Sensing (Vol. 17, p. 97009). Santos, SP.: Galoa.
    BibTeX
    @inproceedings{Santos2019sbsr,
      author = {Santos*, L. F. and Grohmann, C. H.},
      title = {{Processamento fotogramétrico digital por Structure from Motion de imagens obtidas em voos de diferentes alturas sobre o solo}},
      booktitle = {XIX Brazilian Symposium on Remote Sensing},
      year = {2019},
      volume = {17},
      pages = {97009},
      address = {Santos, SP.},
      publisher = {Galoa},
      note = {ISBN: 978-85-17-00097-3},
      oalink = {https://proceedings.science/sbsr-2019/papers/processamento-fotogrametrico-digital-por-structure-from-motion-de-imagens-obtidas-em-voos-de-diferentes-alturas-sobre-o-},
      selection = {yes},
      timestamp = {2020-08-04}
    }
    
    Download

2010

  • Grohmann, C. H., & Campanha, G. A. C. 2010. OpenStereo: Open Source, Cross-Platform Software for Structural Geology Analysis. In Abstract IN31C-06 presented at 2010 Fall Meeting. San Francisco, California: American Geophysical Union.
    BibTeX
    @inproceedings{Grohmann2010agu,
      author = {Grohmann, C. H. and Campanha, G. A. C.},
      title = {{OpenStereo: Open Source, Cross-Platform Software for Structural Geology Analysis}},
      booktitle = {Abstract IN31C-06 presented at 2010 Fall Meeting},
      year = {2010},
      address = {San Francisco, California},
      publisher = {American Geophysical Union},
      oalink = {https://abstractsearch.agu.org/meetings/2010/FM/IN31C-06.html},
      owner = {guano},
      selection = {yes},
      timestamp = {2011.01.06}
    }
    
    Download

 
 

Datasets

2019

  • Grohmann, C. H. 2019. Garopaba Dune Field, Santa Catarina State, Brazil. SfM-MVS point cloud. Data provided by FAPESP grant #2016/06628-0, distributed by OpenTopography.
    BibTeX
    @misc{Grohmann2019otopo-sfm-dune,
      author = {Grohmann, C. H.},
      title = {{Garopaba Dune Field, Santa Catarina State, Brazil. SfM-MVS point cloud}},
      howpublished = {Data provided by FAPESP grant \#2016/06628-0, distributed by OpenTopography},
      year = {2019},
      note = {opentopoID: OTDS.072019.32722.1},
      access = {Open Access},
      doi = {10.5069/G9DV1H19},
      kind = {dataset},
      timestamp = {2020-08-04},
      url = {https://doi.org/10.5069/G9DV1H19}
    }
    
    DOI

  • Grohmann, C. H., Garcia, G. P. B., Affonso, A. A., & Albuquerque, R. W. 2019. Garopaba Dune Field, Santa Catarina State, Brazil. TLS point cloud. Data provided by FAPESP grant #2016/06628-0, distributed by OpenTopography.
    BibTeX
    @misc{Grohmann2019otopo-tls-dune,
      author = {Grohmann, C. H. and Garcia, G. P. B. and Affonso, A. A. and Albuquerque, R. W.},
      title = {{Garopaba Dune Field, Santa Catarina State, Brazil. TLS point cloud}},
      howpublished = {Data provided by FAPESP grant \#2016/06628-0, distributed by OpenTopography},
      year = {2019},
      note = {opentopoID: OTDS.102019.32722.1},
      access = {Open Access},
      doi = {10.5069/G9CN7228},
      kind = {dataset},
      timestamp = {2020-08-04},
      url = {https://doi.org/10.5069/G9CN7228}
    }
    
    DOI

  • Grohmann, C. H. 2019. Lagoinha Landslide, São Paulo State, Brazil. SfM-MVS point cloud. Data provided by FAPESP grant #2016/06628-0, distributed by OpenTopography.
    BibTeX
    @misc{Grohmann2019otopo-lagoinha-sfm,
      author = {Grohmann, C. H.},
      title = {{Lagoinha Landslide, São Paulo State, Brazil. SfM-MVS point cloud}},
      howpublished = {Data provided by FAPESP grant \#2016/06628-0, distributed by OpenTopography},
      year = {2019},
      note = {opentopoID: OTDS.082019.32723.1},
      access = {Open Access},
      doi = {10.5069/G94F1NWJ},
      kind = {dataset},
      timestamp = {2020-08-04},
      url = {https://doi.org/10.5069/G94F1NWJ}
    }
    
    DOI

  • Grohmann, C. H. 2019. Lagoinha Landslide, São Paulo State, Brazil. TLS point cloud. Data provided by FAPESP grant #2016/06628-0, distributed by OpenTopography.
    BibTeX
    @misc{Grohmann2019otopo-lagoinha-tls,
      author = {Grohmann, C. H.},
      title = {{Lagoinha Landslide, São Paulo State, Brazil. TLS point cloud}},
      howpublished = {Data provided by FAPESP grant \#2016/06628-0, distributed by OpenTopography},
      year = {2019},
      note = {opentopoID: OTDS.082019.32723.2},
      access = {Open Access},
      doi = {10.5069/G90P0X57},
      kind = {dataset},
      timestamp = {2020-08-04},
      url = {https://doi.org/10.5069/G90P0X57}
    }
    
    DOI

2010

  • Grohmann, C. H. 2010. Coastal Dune Fields of Garopaba and Vila Nova, Santa Catarina State, Brazil. Airborne LiDAR. Data provided by FAPESP grant #2009/17675-5, distributed by OpenTopography.
    BibTeX
    @misc{Grohmann2010otopo,
      author = {Grohmann, C. H.},
      title = {{Coastal Dune Fields of Garopaba and Vila Nova, Santa Catarina State, Brazil. Airborne LiDAR}},
      howpublished = {Data provided by FAPESP grant \#2009/17675-5, distributed by OpenTopography},
      year = {2010},
      note = {OT Collection ID: OT.032013.32722.1},
      access = {Open Access},
      doi = {10.5069/G9DN430Z},
      kind = {dataset},
      timestamp = {2020-08-04},
      url = {http://dx.doi.org/10.5069/G9DN430Z}
    }
    
    DOI

 
 

Magazine Articles

2007

  • Grohmann, C. H. 2007. r.roughness - a new tool for morphometric analysis in GRASS. Position IT, March/April: 31–32.
    BibTeX
    @article{Grohmann2007positionIT,
      author = {Grohmann, C. H.},
      title = {{r.roughness - a new tool for morphometric analysis in GRASS}},
      journal = {Position IT},
      year = {2007},
      volume = {March/April},
      pages = {31--32},
      citeulike-article-id = {3375616},
      keywords = {grass, roughness},
      kind = {magazine},
      posted-at = {2008-10-04 23:59:49},
      timestamp = {2020-12-30}
    }
    

2005

  • Grohmann, C. H., & Roldan, L. F. 2005. Geomorfologia de terrenos cársticos. Quebra-Corpo, 12: 2–3.
    BibTeX
    @article{Grohmann2005gpme,
      author = {Grohmann, C. H. and Roldan, L. F.},
      title = {{Geomorfologia de terrenos c\'{a}rsticos}},
      journal = {Quebra-Corpo},
      year = {2005},
      volume = {12},
      pages = {2--3},
      citeulike-article-id = {3375635},
      keywords = {karst, speleology, geomorphology},
      kind = {magazine},
      owner = {guano},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-12-30}
    }
    

2004

  • Grohmann, C. H., Lobo, A., & Padial, R. 2004. Topografia da Lapa do Didi, Chapada Diamantina, BA. O Carste, 16: 124–125.
    BibTeX
    @article{Grohmann2004carste,
      author = {Grohmann, C. H. and Lobo, A. and Padial, R.},
      title = {{Topografia da Lapa do Didi, Chapada Diamantina, BA}},
      journal = {O Carste},
      year = {2004},
      volume = {16},
      pages = {124--125},
      citeulike-article-id = {3375627},
      keywords = {speleology},
      kind = {magazine},
      posted-at = {2008-10-04 23:59:50}
    }
    

 
 

GRASS-GIS Tutorials and Add-ons

Tutorials

2016

  • Grohmann, C. H. 2016. Geoprocessamento com GRASS-GIS. Instituto de Energia e Ambiente, Universidade de São Paulo, São Paulo.
    BibTeX
    @techreport{Grohmann2016grass,
      author = {Grohmann, C. H.},
      title = {{Geoprocessamento com GRASS-GIS}},
      institution = {Instituto de Energia e Ambiente, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2016},
      kind = {grasstut},
      oalink = {http://dx.doi.org/10.6084/m9.figshare.3502184},
      owner = {guano},
      timestamp = {2009.09.19}
    }
    
    Download

2012

  • Grohmann, C. H. 2012. Geoprocessamento com Software Livre: GRASS-GIS e QGIS. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @techreport{Grohmann2012grass,
      author = {Grohmann, C. H.},
      title = {{Geoprocessamento com Software Livre: GRASS-GIS e QGIS}},
      institution = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2012},
      kind = {grasstut},
      oalink = {http://dx.doi.org/10.6084/m9.figshare.1004165},
      owner = {guano},
      timestamp = {2009.09.19}
    }
    
    Download

2009

  • Grohmann, C. H. 2009. A very brief introduction to GRASS-GIS using the fishcamp dataset. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @techreport{Grohmann2009grass,
      author = {Grohmann, C. H.},
      title = {{A very brief introduction to GRASS-GIS using the fishcamp dataset}},
      institution = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2009},
      kind = {grasstut},
      oalink = {http://dx.doi.org/10.6084/m9.figshare.1004168},
      owner = {guano},
      timestamp = {2009.09.19}
    }
    
    Download

2008

  • Grohmann, C. H. 2008. Introdução ao geoprocessamento e à análise digital de terreno com software livre. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @techreport{Grohmann2008grass,
      author = {Grohmann, C. H.},
      title = {{Introdu\c c\~{a}o ao geoprocessamento e \`{a} an\'{a}lise digital de terreno com software livre}},
      institution = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2008},
      kind = {grasstut},
      oalink = {http://dx.doi.org/10.6084/m9.figshare.1004167},
      owner = {guano},
      timestamp = {2009.09.19}
    }
    
    Download

Add-ons

r.denoise.py – is a port of r.denoise from bash to python. Originally written by John Stevenson, its purpose is to remove noise (smooth/despeckle) from topographic data, particular DEMs derived from radar data (including SRTM), using Xianfang Sun’s denoising algorithm. It is designed to preserve sharp edges and to denoise with minimal changes to the original data.

r.roughness.vector.py – is a python script to calculate the surface roughness of a DEM as vector dispersion, using a moving-window approach (Grohmann et al., 2011. IEEE Trans.Geos.Rem.Sens.).
Resulting maps are: Vector Strength (R) and Inverted Fisher’s k parameter. This script is updated for GRASS-GIS version 7. Contributions to the code by Helmut Kudrnovsky.

(old) r.roughness – is a GRASS-GIS (versions 6.1 or above) shell script to calculate the surface roughness of a DEM, using r.surf.area and v.surf.rst. (uses sh as shell. Use r.roughness_bash, if you run bash).

(old) r.roughness60 – for GRASS-GIS versions 6.0.x.

(old) azimuth.c – is a small C program to calculate the azimuth and length of vector lines exported by GRASS-GIS as ASCII files. It is useful for create rose diagrams of lineament maps. Improvements on the original code after suggestions by Örs Téglásy, Hungary.

See all GRASS AddOns

You can also check the code for these AddOns at my GitHub page.

 
 

Theses (Mixed Portuguese and English)

2015

  • Grohmann, C. H. 2015. Análise Digital de Terreno: Aplicações em Geologia e Geomorfologia. Tese de Livre-Docência. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @phdthesis{Grohmann2015ld,
      author = {Grohmann, C. H.},
      title = {{Análise Digital de Terreno: Aplicações em Geologia e Geomorfologia}},
      school = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2015},
      type = {Tese de Livre-Docência},
      month = {agosto},
      access = {Open Access},
      doi = {10.11606/T.106.2019.tde-30072019-161617},
      link = {https://doi.org/10.11606/T.106.2019.tde-30072019-161617},
      timestamp = {2020-12-30}
    }
    
    DOI

2008

  • Grohmann, C. H. 2008. Análise digital de terreno do centro-leste brasileiro. PhD thesis. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @phdthesis{Grohmann2008phd,
      author = {Grohmann, C. H.},
      title = {{An\'{a}lise digital de terreno do centro-leste brasileiro}},
      school = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2008},
      access = {Open Access},
      doi = {10.11606/t.44.2008.tde-03022009-141229},
      link = {http://dx.doi.org/10.11606/t.44.2008.tde-03022009-141229},
      owner = {guano},
      timestamp = {2020-08-04}
    }
    
    DOI

2004

  • Grohmann, C. H. 2004. Técnicas de geoprocessamento aplicadas à análise morfométrica. Master's thesis. Instituto de Geociências, Universidade de São Paulo, São Paulo.
    BibTeX
    @mastersthesis{Grohmann2004msc,
      author = {Grohmann, C. H.},
      title = {{T\'{e}cnicas de geoprocessamento aplicadas \`{a} an\'{a}lise morfom\'{e}trica}},
      school = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo.},
      year = {2004},
      access = {Open Access},
      doi = {10.11606/d.44.2004.tde-10082006-155540},
      keywords = {grass, gis, geomorphometry},
      link = {http://dx.doi.org/10.11606/d.44.2004.tde-10082006-155540},
      pages = {70},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-08-04}
    }
    
    DOI

2001

  • Grohmann, C. H. 2001. Assinaturas extensionais relacionadas à extrusão sob regime compressional de nappe de alta pressão. Master's thesis. Instituto de Geociências, Universidade de São Paulo, São Paulo, Monografia de Trabalho de Formatura.
    BibTeX
    @mastersthesis{Grohmann2001tf,
      author = {Grohmann, C. H.},
      title = {{Assinaturas extensionais relacionadas \`{a} extrus\~{a}o sob regime compressional de nappe de alta press\~{a}o}},
      school = {Instituto de Geoci\^{e}ncias, Universidade de S\~{a}o Paulo, S\~{a}o Paulo, Monografia de Trabalho de Formatura},
      year = {2001},
      access = {Open Access},
      citeulike-article-id = {3375626},
      doi = {10084/m9.figshare.1089658},
      keywords = {structural\_geology},
      link = {http://dx.doi.org/10084/m9.figshare.1089658},
      posted-at = {2008-10-04 23:59:50},
      timestamp = {2020-08-04}
    }
    
    DOI