Hydrochemical variability at the Upper Paraguay Basin and Pantanal wetland

Autor: Reynaldo Luiz Victoria, Laurent Barbiero, C. Mascre, A. Rezende Filho, Sônia Furian, Vincent Valles
Přispěvatelé: Laboratório de Pedologia, Departamento de Geografia, Universidade Federal de Mato Grosso do Sul (UFMS), Indo French Center for Groundwater Research, National Geophysical Research Institute, Laboratoire d'Hydrogéologie d'Avignon (LHA), Avignon Université (AU), Laboratoire des Mécanismes et Transfert en Géologie (LMTG), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Indo-French Center for Groundwater Research (IFCGR), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM)-National Geophysical Research Institute [Hyderabad] (NGRI), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Universidade de São Paulo (USP), Géosciences Environnement Toulouse (GET), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD), Universidade de São Paulo = University of São Paulo (USP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP)
Rok vydání: 2012
Předmět:
Floodplain
010504 meteorology & atmospheric sciences
Lithology
Wetland
Structural basin
Spatial distribution
01 natural sciences
lcsh:Technology
lcsh:TD1-1066
[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry
Tributary
[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology
lcsh:Environmental technology. Sanitary engineering
QUÍMICA AQUÁTICA
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces
environment
lcsh:Environmental sciences
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
Hydrology
lcsh:GE1-350
geography
geography.geographical_feature_category
lcsh:T
lcsh:Geography. Anthropology. Recreation
Sampling (statistics)
04 agricultural and veterinary sciences
15. Life on land
6. Clean water
lcsh:G
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
Surface water
Zdroj: Hydrology and Earth System Sciences Discussions
Hydrology and Earth System Sciences Discussions, European Geosciences Union, 2012, 9 (3), pp.3129-3163. ⟨10.5194/hessd-9-3129-2012⟩
Hydrology and Earth System Sciences Discussions, 2012, 9 (3), pp.3129-3163. ⟨10.5194/hessd-9-3129-2012⟩
Hydrology and Earth System Sciences, Vol 16, Iss 8, Pp 2723-2737 (2012)
Hydrology and Earth System Sciences
Hydrology and Earth System Sciences, European Geosciences Union, 2012, 16 (8), pp.2723-2737. ⟨10.5194/hess-16-2723-2012⟩
Hydrology and Earth System Sciences, 2012, 16 (8), pp.2723-2737. ⟨10.5194/hess-16-2723-2012⟩
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
ISSN: 1812-2108
1812-2116
1027-5606
1607-7938
DOI: 10.5194/hessd-9-3129-2012⟩
Popis: Compartmentalization is a prerequisite to understand large wetlands that receive water from several sources. However, it faces the heterogeneity in space and time, resulting from physical, chemical and biological processes that are specific to wetlands. The Pantanal is a vast seasonally flooded continental wetland located in the centre of South America. The chemical makeup of the waters that supply the Pantanal (70 rivers) has been studied in order to establish a compartmentalization of the wetland based on soil-water interactions. A PCA-based EMMA (End-Members Mixing Analysis) procedure shows that the chemistry of the rivers can be regarded as a mixture of 3 end-members, influenced by lithology and land use, and delimiting large regions. Although the chemical composition of the end-members changed between dry and wet seasons, their spatial distribution was maintained. The results were extended to the floodplain by simple tributary mixing calculation according to the hydrographical network and to the areas of influence for each river when in overflow conditions. The resulting document highlights areas of high geochemical contrast on either side of the river Cuiaba in the north, and of the rivers Aquidauana and Abobral located in the south. The PCA-based treatment on a sampling conducted in the Nhecolândia, a large sub region of the Pantanal floodplain, allowed for the identification and prioritization of the processes that control the geochemical variability of the surface waters. Despite an enormous variability in Electrical Conductivity and pH, all data collected were in agreement with an evaporation process of the Taquari River water, which supplies the region. Evaporation and associated saline precipitations (Mg-calcite, Mg-silicates K-silicates) explained more than 77% of the total variability in the chemistry of the regional surface water sampling.
Databáze: OpenAIRE
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