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Eder Merino
Institute of Energy and Environment, University of Sao Paulo, São Paulo 05508-060, Brazil

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Journal article
Published: 24 April 2020 in Remote Sensing
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Global measurements of reservoir water levels are crucial for understanding Earth’s hydrological dynamics, especially in the context of global industrialization and climate change. Although radar altimetry has been used to measure the water level of some reservoirs with high accuracy, it is not yet feasible unless the water body is sufficiently large or directly located at the satellite’s nadir. This study proposes a gauging method applicable to a wide range of reservoirs using Sentinel–1 Synthetic Aperture Radar data and a digital elevation model (DEM). The method is straightforward to implement and involves estimating the mean slope–corrected elevation of points along the reservoir shoreline. We test the model on six case studies and show that the estimated water levels are accurate to around 10% error on average of independently verified values. This study represents a substantial step toward the global gauging of lakes and reservoirs of all sizes and in any location where a DEM is available.

ACS Style

Edward Park; Eder Merino; Quinn W. Lewis; Eric O. Lindsey; Xiankun Yang. A Pathway to the Automated Global Assessment of Water Level in Reservoirs with Synthetic Aperture Radar (SAR). Remote Sensing 2020, 12, 1353 .

AMA Style

Edward Park, Eder Merino, Quinn W. Lewis, Eric O. Lindsey, Xiankun Yang. A Pathway to the Automated Global Assessment of Water Level in Reservoirs with Synthetic Aperture Radar (SAR). Remote Sensing. 2020; 12 (8):1353.

Chicago/Turabian Style

Edward Park; Eder Merino; Quinn W. Lewis; Eric O. Lindsey; Xiankun Yang. 2020. "A Pathway to the Automated Global Assessment of Water Level in Reservoirs with Synthetic Aperture Radar (SAR)." Remote Sensing 12, no. 8: 1353.

Journal article
Published: 28 March 2020 in Remote Sensing
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The Nhecolândia region, located in the southern portion of the Pantanal wetland area, is a unique lacustrine system where tens of thousands of saline-alkaline and freshwater lakes and ponds coexist in close proximity. These lakes are suspected to be a strong source of greenhouse gases (GHGs) to the atmosphere, the water pH being one of the key factors in controlling the biogeochemical functioning and, consequently, production and emission of GHGs in these lakes. Here, we present a new field-validated classification of the Nhecolândia lakes using water pH values estimated based on a cloud-based Landsat (5 TM, 7 ETM+, and 8 OLI) 2002–2017 time-series in the Google Earth Engine platform. Calibrated top-of-atmosphere (TOA) reflectance collections with the Fmask method were used to ensure the usage of only cloud-free pixels, resulting in a dataset of 2081 scenes. The pH values were predicted by applying linear multiple regression and symbolic regression based on genetic programming (GP). The regression model presented an R2 value of 0.81 and pH values ranging from 4.69 to 11.64. A lake mask was used to extract the predicted pH band that was then classified into three lake classes according to their pH values: Freshwater (pH < 8), oligosaline (pH 8–8.9), and saline (≥9). Nearly 12,150 lakes were mapped with those with saline waters accounting for 7.25%. Finally, a trend surface map was created using the ALOS PRISM Digital Surface Model (DSM) to analyze the correlation between landscape features (topography, connection with the regional drainage system, size, and shape of lakes) and types of lakes. The analysis was in consonance with previous studies that pointed out that saline lakes tend to occur in lower positions compared to freshwater lakes. The results open a relevant perspective for the transfer of locally acquired experimental data to the regional balances of the Nhecolândia lakes.

ACS Style

Osvaldo J. R. Pereira; Eder R. Merino; Célia R. Montes; Laurent Barbiero; Ary T. Rezende-Filho; Yves Lucas; Adolpho J. Melfi. Estimating Water pH Using Cloud-Based Landsat Images for a New Classification of the Nhecolândia Lakes (Brazilian Pantanal). Remote Sensing 2020, 12, 1090 .

AMA Style

Osvaldo J. R. Pereira, Eder R. Merino, Célia R. Montes, Laurent Barbiero, Ary T. Rezende-Filho, Yves Lucas, Adolpho J. Melfi. Estimating Water pH Using Cloud-Based Landsat Images for a New Classification of the Nhecolândia Lakes (Brazilian Pantanal). Remote Sensing. 2020; 12 (7):1090.

Chicago/Turabian Style

Osvaldo J. R. Pereira; Eder R. Merino; Célia R. Montes; Laurent Barbiero; Ary T. Rezende-Filho; Yves Lucas; Adolpho J. Melfi. 2020. "Estimating Water pH Using Cloud-Based Landsat Images for a New Classification of the Nhecolândia Lakes (Brazilian Pantanal)." Remote Sensing 12, no. 7: 1090.

Short communication
Published: 23 March 2020 in Science of The Total Environment
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Here we present a proof of concept evaluation of the impacts of riverbed-mining on river-wetland connectivity by analyzing the temporal trends of the flood frequencies in the Vietnamese Mekong Delta (VMD), while accounting for the effect of dyke constructions. We focus on the Long Xuyen Quadrangle (LXQ), which is significant in terms of biodiversity and economic contribution to the VMD as it is one of the most important food baskets of Southeast Asia that depends on seasonal flooding. Our results indicate that the flood frequency in LXQ has decreased significantly over the past 20 years (1995–2015). Time-series analyses of water level data at Chau Doc, Tan Chau, and Can Tho stations confirmed that the overall descending trend is statistically significant (p-value < 0.001 and tau ~ 0.1). However, the river discharge at Kratie showed no significant trend (p-value = 0.98) over the same period. This indicates that the flood frequency is associated with the lowering of the riverbed (incision) other than climatic factors. The connectivity analysis also revealed a remarkable drop in the inundation duration after early 2000, which corresponds to the previous observations of the shifting shoreline of the VMD from construction to shrinking. Finally, regression and principal component analyses underpinned the strong causality between the riverbed-mining and the decreased seasonal flooding patterns in LXQ, while accounting for the effect of the dyke system over the last decades (R2 = 0.75). This study offers compelling evidences on the relationship between sand-mining in the river and the disrupted flood regimes in VMD. The reduction in water and sediments that is necessary for sustaining current rates of agricultural production in the long term would endanger the livelihoods of millions of VMD inhabitants.

ACS Style

Edward Park; Loc Ho; Dung Duc Tran; Xiankun Yang; Enner Alcantara; Eder Merino; Vu Hai Son. Dramatic decrease of flood frequency in the Mekong Delta due to river-bed mining and dyke construction. Science of The Total Environment 2020, 723, 138066 .

AMA Style

Edward Park, Loc Ho, Dung Duc Tran, Xiankun Yang, Enner Alcantara, Eder Merino, Vu Hai Son. Dramatic decrease of flood frequency in the Mekong Delta due to river-bed mining and dyke construction. Science of The Total Environment. 2020; 723 ():138066.

Chicago/Turabian Style

Edward Park; Loc Ho; Dung Duc Tran; Xiankun Yang; Enner Alcantara; Eder Merino; Vu Hai Son. 2020. "Dramatic decrease of flood frequency in the Mekong Delta due to river-bed mining and dyke construction." Science of The Total Environment 723, no. : 138066.

Journal article
Published: 16 December 2019 in Earth Surface Processes and Landforms
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ACS Style

Eder Renato Merino; Mario Luis Assine. Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology. Earth Surface Processes and Landforms 2019, 45, 440 -458.

AMA Style

Eder Renato Merino, Mario Luis Assine. Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology. Earth Surface Processes and Landforms. 2019; 45 (2):440-458.

Chicago/Turabian Style

Eder Renato Merino; Mario Luis Assine. 2019. "Hidden in plain sight: How finding a lake in the Brazilian Pantanal improves understanding of wetland hydrogeomorphology." Earth Surface Processes and Landforms 45, no. 2: 440-458.

Journal article
Published: 31 March 2019 in Revista Brasileira de Geomorfologia
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The Pantanal wetland is a complex landscape with distinct hydrogeomorphic compartments, with singular and hydrosedimentary processes. Examining these processes draws great interest in understanding Pantanal dynamics for both the management of the system and the geological record predicted by facies models. Hydrosedimentary data in the Pantanal remain scarce, in spite of government efforts to improve and increase data collection in the Upper Paraguay Basin. This study aims to enhance the understanding of active hydrosedimentary processes in the Pantanal Paraguay trunk-river system in the Corumbá reach. Hydrosedimentary surveys were accomplished in the main channel and tributaries of the Paraguay River. These surveys helped characterize the hydrosedimentary dynamics to consider the active sedimentary processes in this reach. The Paraguay River interacts complexly with its floodplain, which functions as a reservoir retaining flood water and disturbing river discharge. Bathymetric surveying showed that Paraguay River channel has longitudinal compound bar bedforms built by superimposition of ripples. The backwater effect, possibly related with both hydrological regime and geomorphological characteristics of the area, was detected by means of rating-curve analysis of the gauge stations. This effect is hydrologically produced by the out-of-phase flood pulse of the Pantanal and geomorphically driven by the hydraulic bottleneck of the Urucum and Bodoquena massifs. Both factors possibly occur simultaneously. The hydrogeomorphic characteristics (morphology, river competence, and stream power) of the Paraguay River denote that the elaboration of models more appropriate to the Pantanal context is needed.

ACS Style

Hudson De Azevedo Macedo; José Cândido Stevaux; Aguinaldo Silva; Eder Renato Merino; Edward Limin Lo; Mario Luis Assine. Hydrosedimentology of the Paraguay River in the Corumbá fluvial reach, Pantanal wetland. Revista Brasileira de Geomorfologia 2019, 20, 1 .

AMA Style

Hudson De Azevedo Macedo, José Cândido Stevaux, Aguinaldo Silva, Eder Renato Merino, Edward Limin Lo, Mario Luis Assine. Hydrosedimentology of the Paraguay River in the Corumbá fluvial reach, Pantanal wetland. Revista Brasileira de Geomorfologia. 2019; 20 (2):1.

Chicago/Turabian Style

Hudson De Azevedo Macedo; José Cândido Stevaux; Aguinaldo Silva; Eder Renato Merino; Edward Limin Lo; Mario Luis Assine. 2019. "Hydrosedimentology of the Paraguay River in the Corumbá fluvial reach, Pantanal wetland." Revista Brasileira de Geomorfologia 20, no. 2: 1.

Journal article
Published: 14 March 2019 in Sedimentary Geology
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The influence of biotic processes in controlling the development of meandering channels in fluvial systems is controversial. The majority of the depositional history of the Earth’s continents was devoid of significant biogeomorphic interactions, particularly those between vegetation and sedimentation processes. The prevailing perspective has been that prevegetation meandering channels rarely developed and that rivers with braided planforms dominated. However, recently acquired data demonstrate that meandering channel planforms are more widely preserved in prevegetation fluvial successions than previously thought. Understanding the role of prevailing fluvial dynamics in non- and poorly vegetated environments must rely on actualistic models derived from presently active rivers developed in sedimentary basins subject to desert-climate settings, the sparsest vegetated regions experiencing active sedimentation on Earth. These systems have fluvial depositional settings that most closely resemble those present in prevegetation (and extra-terrestrial) environments. Here, we present an analysis based on satellite imagery which reveals that rivers with meandering channel planforms are common in modern sedimentary basins in desert settings. Morphometric analysis of meandering fluvial channel behaviour, where vegetation is absent or highly restricted, shows that modern sparsely and non-vegetated meandering rivers occur across a range of slope gradients and basin settings, and possess a broad range of channel and meander-belt dimensions. The importance of meandering rivers in modern desert settings suggests that their abundance is likely underestimated in the prevegetation rock record, and models for recognition of their deposits need to be improved.

ACS Style

Mauricio G.M. Santos; Adrian J. Hartley; Nigel Mountney; Jeff Peakall; Amanda Owen; Eder Merino; Mario Assine. Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers. Sedimentary Geology 2019, 385, 1 -14.

AMA Style

Mauricio G.M. Santos, Adrian J. Hartley, Nigel Mountney, Jeff Peakall, Amanda Owen, Eder Merino, Mario Assine. Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers. Sedimentary Geology. 2019; 385 ():1-14.

Chicago/Turabian Style

Mauricio G.M. Santos; Adrian J. Hartley; Nigel Mountney; Jeff Peakall; Amanda Owen; Eder Merino; Mario Assine. 2019. "Meandering rivers in modern desert basins: Implications for channel planform controls and prevegetation rivers." Sedimentary Geology 385, no. : 1-14.

Journal article
Published: 01 October 2017 in Revista Brasileira de Geomorfologia
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Rivers are immensely important to human activities such as water supply, navigation, energy generation, and agriculture. They are also an important morphodynamic agent of erosion, transport and deposition. Their capacity to transport sediment depends on their hydraulic characteristics and can be predicted by mathematical models. Several mathematical models can be used to compute bed-load transport. Each one is appropriately better for certain conditions. In this paper, we present an application built in Microsoft Excel to compute the bed-load transport in rivers based on the Van Rijn mathematical model. The Van Rijn model is appropriate for rivers transporting sandy sediments in conditions of subcritical flow. Hydraulic parameters such as channel slope, stream power, and Reynolds and Froude numbers can be calculated using the application proposed here. The application was tested in the Paraná River and results from the calculations are consistent with data obtained from fieldwork surveys. The error of the application was only 20%, which shows good agreement of the model with survey values.

ACS Style

Hudson De Azevedo Macedo; José Cândido Stevaux; Mario Luis Assine; Aguinaldo Silva; Fabiano Do Nascimento Pupim; Eder Renato Merino; Edward Lo. CALCULATING BEDLOAD TRANSPORT IN RIVERS: CONCEPTS, CALCULUS ROUTINES AND APPLICATION. Revista Brasileira de Geomorfologia 2017, 18, 1 .

AMA Style

Hudson De Azevedo Macedo, José Cândido Stevaux, Mario Luis Assine, Aguinaldo Silva, Fabiano Do Nascimento Pupim, Eder Renato Merino, Edward Lo. CALCULATING BEDLOAD TRANSPORT IN RIVERS: CONCEPTS, CALCULUS ROUTINES AND APPLICATION. Revista Brasileira de Geomorfologia. 2017; 18 (4):1.

Chicago/Turabian Style

Hudson De Azevedo Macedo; José Cândido Stevaux; Mario Luis Assine; Aguinaldo Silva; Fabiano Do Nascimento Pupim; Eder Renato Merino; Edward Lo. 2017. "CALCULATING BEDLOAD TRANSPORT IN RIVERS: CONCEPTS, CALCULUS ROUTINES AND APPLICATION." Revista Brasileira de Geomorfologia 18, no. 4: 1.

Journal article
Published: 01 September 2015 in Brazilian Journal of Geology
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The Pantanal Basin is an active sedimentary basin in central-west Brazil that consists of a complex alluvial systems tract characterized by the interaction between different river systems developed in one of the largest wetlands in the world. The Paraguay River is the trunk river system that drains the water and part of the sediment load received from areas outside of the basin. Depositional styles vary considerably along the river profiles throughout the basin, with the development of entrenched meandering belts, anastomosing reaches, and floodplain ponds. Paleodrainage patterns are preserved on the surface of abandoned lobes of fluvial fans, which also exhibit many degradational channels. Here, we propose a novel classification scheme according to which the geomorphology, hydrological regime and sedimentary dynamics of these fluvial systems are determined by the geology and geomorphology of the source areas. In this way, the following systems are recognized and described: (I) the Paraguay trunk-river plains; (II) fluvial fans sourced by the tablelands catchment area; (III) fluvial fans sourced by lowlands; and (IV) fluvial interfans. We highlight the importance of considering the influences of source areas when interpreting contrasting styles of fluvial architectures in the rock record.

ACS Style

Mario Luis Assine; Eder Renato Merino; Fabiano Do Nascimento Pupim; Hudson De Azevedo Macedo; Mauricio Guerreiro Martinho Dos Santos. The Quaternary alluvial systems tract of the Pantanal Basin, Brazil. Brazilian Journal of Geology 2015, 45, 475 -489.

AMA Style

Mario Luis Assine, Eder Renato Merino, Fabiano Do Nascimento Pupim, Hudson De Azevedo Macedo, Mauricio Guerreiro Martinho Dos Santos. The Quaternary alluvial systems tract of the Pantanal Basin, Brazil. Brazilian Journal of Geology. 2015; 45 (3):475-489.

Chicago/Turabian Style

Mario Luis Assine; Eder Renato Merino; Fabiano Do Nascimento Pupim; Hudson De Azevedo Macedo; Mauricio Guerreiro Martinho Dos Santos. 2015. "The Quaternary alluvial systems tract of the Pantanal Basin, Brazil." Brazilian Journal of Geology 45, no. 3: 475-489.

Book chapter
Published: 29 August 2015 in The Handbook of Environmental Chemistry
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What is an inlier sedimentary basin? What are the main mechanisms of sedimentary infilling? How do the depositional systems behave? And last, but certainly not the least, what geological events occurred in the last million years and continue to take place in the Pantanal area today? These issues are considered in this chapter, based on available geological, geomorphological, and geochronological datasets. The Pantanal is an active sedimentary basin with numerous faults and associated earthquakes. Movements along these faults cause subsidence on blocks within the basin, generating depressions that are highly susceptible to flooding, and also create accommodation space for sediment storage. One hypothesis on the origin of the Pantanal Basin relates the processes of subsidence with tectonic activity in the Andean orogen and foreland system during the Quaternary. Alternatively, the lack of geochronological data leaves open the possibility that the basin formed much earlier, perhaps during an interval of widespread tectonism in Brazil during the Eocene. The modern Pantanal depositional tract is composed of the Paraguay River trunk system, numerous fluvial megafans and interfan floodplains, and thousands of lakes, many of them integral to the Nhecolândia landscape. The Pantanal’s geomorphology is most likely the product of climatic fluctuations and environmental changes that have been occurring since the Late Pleistocene. Relict morphologic features like paleochannels have been preserved on the surfaces of abandoned lobes on several large fluvial megafans. After a period dominated by arid conditions in the Late Pleistocene, the Pantanal area experienced an episode of humidification and increasing fluvial discharge in the Early Holocene. This process promoted important modifications in the extant drainage system, for example, the avulsion of the Paraguay River that caused the Nabileque paleomeander belt to be abandoned. The landscape and sedimentary deposits of Pantanal Basin are “living” geologic records of changing rivers, avulsions, floods, and climate changes that occurred in the last several thousand years. Understanding the dynamics of these transitions is critical for unveiling the geologic history of the world’s largest tropical wetland.

ACS Style

Mario Luis Assine; Eder Merino; Fabiano Pupim; Lucas Verissimo Warren; Renato L. Guerreiro; Michael M. McGlue. Geology and Geomorphology of the Pantanal Basin. The Handbook of Environmental Chemistry 2015, 23 -50.

AMA Style

Mario Luis Assine, Eder Merino, Fabiano Pupim, Lucas Verissimo Warren, Renato L. Guerreiro, Michael M. McGlue. Geology and Geomorphology of the Pantanal Basin. The Handbook of Environmental Chemistry. 2015; ():23-50.

Chicago/Turabian Style

Mario Luis Assine; Eder Merino; Fabiano Pupim; Lucas Verissimo Warren; Renato L. Guerreiro; Michael M. McGlue. 2015. "Geology and Geomorphology of the Pantanal Basin." The Handbook of Environmental Chemistry , no. : 23-50.

Journal article
Published: 01 April 2015 in Geomorphology
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ACS Style

Fabiano Do Nascimento Pupim; Paul R. Bierman; Mario Luis Assine; Dylan H. Rood; Aguinaldo Silva; Eder Renato Merino. Erosion rates and landscape evolution of the lowlands of the Upper Paraguay river basin (Brazil) from cosmogenic 10Be. Geomorphology 2015, 234, 151 -160.

AMA Style

Fabiano Do Nascimento Pupim, Paul R. Bierman, Mario Luis Assine, Dylan H. Rood, Aguinaldo Silva, Eder Renato Merino. Erosion rates and landscape evolution of the lowlands of the Upper Paraguay river basin (Brazil) from cosmogenic 10Be. Geomorphology. 2015; 234 ():151-160.

Chicago/Turabian Style

Fabiano Do Nascimento Pupim; Paul R. Bierman; Mario Luis Assine; Dylan H. Rood; Aguinaldo Silva; Eder Renato Merino. 2015. "Erosion rates and landscape evolution of the lowlands of the Upper Paraguay river basin (Brazil) from cosmogenic 10Be." Geomorphology 234, no. : 151-160.

Journal article
Published: 30 March 2015 in Revista Brasileira de Geomorfologia
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Estudos referentes à fisiografia e ao funcionamento de sistemas fluviais têm aumentado em todo mundo e o mesmo se aplica àqueles realizados nos grandes sistemas fluviais brasileiros. Inúmeras são as dificuldades para o estudo de grandes planícies fluviais destacando-se o acesso e a locomoção. A utilização de produtos de sensoriamento remoto e geotecnologias são ótimas alternativas para o estudo de áreas de difícil acesso. Com a crescente popularização das geotecnologias, os modelos digitais de elevação (MDEs) tornaram-se os produtos mais comuns para análise e extração de informações topográficas e os dados SRTM (Shuttle Radar Topography Mission) representam o mais completo MDE global. Entretanto, em áreas sazonalmente alagáveis e grandes planícies fluviais, muitas informações espaciais são omitidas devido à ausência de processamentos adequados do MDE. Este artigo apresenta técnicas de realce e integração de dados SRTM com imagens orbitais óticas para aplicação em estudos geomorfológicos em grandes planícies fluviais, tendo como exemplo as planícies do Pantanal. Após processados adequadamente, de acordo com a amplitude topográfica e as características morfológicas da área, dados SRTM ressaltaram a geometria de grandes sistemas fluviais distributários (megaleques) e suas formas deposicionais internas (canais com diques marginais e lobos distributários). A fusão IHS (Intensity-Hue-Saturation) de imagem composição R7G4B3 (Landsat 7 ETM+) e imagem de relevo sombreado derivado do SRTM TOPODATA (Hillshade) destacou o contato entre a planície do Pantanal e áreas do embasamento da bacia. Este trabalho demonstra que, mesmo em áreas extremamente planas como o Pantanal, processamentos adicionais melhoram significativamente a identificação de características morfológicas captadas por dados SRTM.

ACS Style

Eder Merino; Fabiano Pupim; Hudson Macedo; Mario Luis Assine. REALCE E INTEGRAÇÃO DE IMAGENS ORBITAIS ÓTICAS COM DADOS SRTM PARA MAPEAMENTO E ESTUDO DE GRANDES PLANÍCIES FLUVIAIS: EXEMPLOS DE APLICAÇÃO NO PANTANAL. Revista Brasileira de Geomorfologia 2015, 16, 1 .

AMA Style

Eder Merino, Fabiano Pupim, Hudson Macedo, Mario Luis Assine. REALCE E INTEGRAÇÃO DE IMAGENS ORBITAIS ÓTICAS COM DADOS SRTM PARA MAPEAMENTO E ESTUDO DE GRANDES PLANÍCIES FLUVIAIS: EXEMPLOS DE APLICAÇÃO NO PANTANAL. Revista Brasileira de Geomorfologia. 2015; 16 (1):1.

Chicago/Turabian Style

Eder Merino; Fabiano Pupim; Hudson Macedo; Mario Luis Assine. 2015. "REALCE E INTEGRAÇÃO DE IMAGENS ORBITAIS ÓTICAS COM DADOS SRTM PARA MAPEAMENTO E ESTUDO DE GRANDES PLANÍCIES FLUVIAIS: EXEMPLOS DE APLICAÇÃO NO PANTANAL." Revista Brasileira de Geomorfologia 16, no. 1: 1.

Journal article
Published: 24 April 2014 in Revista Brasileira de Geomorfologia
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O Paraguai é o rio-tronco do trato de sistemas deposicionais do Pantanal. Com base em dados de sensores remotos e verificação de campo, foi realizado mapeamento geomorfológico da planície do rio Paraguai no trecho entre as confluências dos rios Cuiabá e Miranda, onde foram reconhecidas formas deposicionais atuais e antigas. A análise das associações de formas permitiu estabelecer proposta de evolução geomorfológica para a área, mas os eventos carecem ainda de datação precisa por métodos geocronológicos. Uma rede de drenagem abandonada multicanais está parcialmente preservada na planície, sendo composta por formas de canais com diques marginais que evidenciam período de menor descarga fluvial, provavelmente do Pleistoceno tardio ao Holoceno inferior. Um sistema constituído por paleocinturões de meandros trunca a paleorrede de drenagem multicanais, registrando aumento na umidade e na descarga fluvial. Sob essas condições o rio Paraguai construiu um sistema composto por cinturões de meandros com direção aproximada norte-sul no Holoceno inferior/médio. Agradação dos cinturões favoreceu importante evento de avulsão, com a mudança do curso do rio Paraguai para o cinturão de meandros atual no Holoceno superior. As gerações de formas identificadas e mapeadas resultaram num padrão de sobreposição de diferentes estilos fluviais, que registram significativas mudanças hidrológicas na planície desde o Pleistoceno tardio.

ACS Style

Hudson Macedo; Mario Luis Assine; Fabiano Pupim; Eder Merino; José Cândido Stevaux; Aguinaldo Silva. MUDANÇAS PALEO-HIDROLÓGICAS NA PLANÍCIE DO RIO PARAGUAI, QUATERNÁRIO DO PANTANAL. Revista Brasileira de Geomorfologia 2014, 15, 1 .

AMA Style

Hudson Macedo, Mario Luis Assine, Fabiano Pupim, Eder Merino, José Cândido Stevaux, Aguinaldo Silva. MUDANÇAS PALEO-HIDROLÓGICAS NA PLANÍCIE DO RIO PARAGUAI, QUATERNÁRIO DO PANTANAL. Revista Brasileira de Geomorfologia. 2014; 15 (1):1.

Chicago/Turabian Style

Hudson Macedo; Mario Luis Assine; Fabiano Pupim; Eder Merino; José Cândido Stevaux; Aguinaldo Silva. 2014. "MUDANÇAS PALEO-HIDROLÓGICAS NA PLANÍCIE DO RIO PARAGUAI, QUATERNÁRIO DO PANTANAL." Revista Brasileira de Geomorfologia 15, no. 1: 1.

Journal article
Published: 21 March 2014 in Revista Brasileira de Geomorfologia
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Resumo O rio Miranda é um importante afluente do rio Paraguai e tem grande parte de seu curso na planície do Pantanal. O rio tem sinuosidade média a alta, sendo do tipo meandrante na maior parte do seu percurso em domínio aluvial. Com base nos padrões do canal e da planície, três segmentos fluviais com diferentes estilos foram caracterizados e descritos. Ainda nos domínios do planalto, o rio forma um cinturão de meandros numa planície agradacional, que está confinada em vale no embasamento cristalino. O rio deixa de correr num cinturão de meandros ao adentrar no Pantanal, para formar um cordão composto por canal e diques marginais que se destaca pela elevação mais alta em relação à planície agradacional, que se torna mais larga ao deixar o vale confinado. Paleocinturões de meandros e grandes meandros abandonados com dimensões superiores às dos canais atuais, existentes nas planícies agradacionais, permitem interpretar importantes mudanças ambientais e paleohidrológicas ocorridas a partir do Pleistoceno tardio. No seu baixo curso o rio volta a correr num cinturão de meandros, porem inciso em depósitos aluviais mais antigos, o que denuncia a natureza degradacional da planície distal do rio. Esta planície é palco da ação erosiva de fluxos de águas em lençol durante as inundações e de incisão por rede de pequenos canais tributários que drenam a planície depois das cheias. A avulsão ocorrida na altura do Morro do Azeite desempenhou importante papel na configuração do traçado do canal atual do rio Miranda, deslocando em 20 km para norte sua foz no rio Paraguai. Palavras Chave – Rio Miranda, Pantanal, rio meandrante

ACS Style

Eder Renato Merino; Mario Luis Assine; Fabiano Do Nascimento Pupim. ESTILOS FLUVIAIS E EVIDÊNCIAS DE MUDANÇAS AMBIENTAIS NA PLANÍCIE DO RIO MIRANDA, PANTANAL. Revista Brasileira de Geomorfologia 2014, 14, 1 .

AMA Style

Eder Renato Merino, Mario Luis Assine, Fabiano Do Nascimento Pupim. ESTILOS FLUVIAIS E EVIDÊNCIAS DE MUDANÇAS AMBIENTAIS NA PLANÍCIE DO RIO MIRANDA, PANTANAL. Revista Brasileira de Geomorfologia. 2014; 14 (2):1.

Chicago/Turabian Style

Eder Renato Merino; Mario Luis Assine; Fabiano Do Nascimento Pupim. 2014. "ESTILOS FLUVIAIS E EVIDÊNCIAS DE MUDANÇAS AMBIENTAIS NA PLANÍCIE DO RIO MIRANDA, PANTANAL." Revista Brasileira de Geomorfologia 14, no. 2: 1.