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GET - Geosciences -Environnement- Toulouse |  |
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GET - Geosciences -Environnement- Toulouse | |
| HAL : ird-00270979, version 1 |
| DOI : 10.1016/j.jhydrol.2007.10.055 |
| Code IRD Horizon : fdi:010040951 |
| Fiche détaillée |  Récupérer au format |
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| Journal of Hydrology 349, 1-2 (2008) 18-30 |
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| Floodplain hydrology in an Amazon floodplain lake (Lago Grande de Curuai) |
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| Marie-Paule Bonnet 1Gwénaël Barroux 1 |
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| (2008) |
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| The floodplains of the Amazon basin influence the hydrology and fluxes of suspended solids and solutes on multiple scales. Our study focused on the floodplain of Lago Grande de Curuai (Obidos, Brazil), a 4000 km(2) segment of floodplain and local upland catchment representative of the lower Amazon. Based on in situ and satellite data acquired from 1997 to 2003, we calculated the exchanges of water between the floodplain and the river and determined the temporal dynamics of flooded area water derived from river flooding, rainfall, runoff, and exchange with groundwater annually for six years. The Amazon River dominated the inputs of water to the flooded area year-round, accounting about 77% of the annual total inputs; rainfall and runoff accounted for about 9% and 10%, respectively, while seepage from the groundwater system accounted for 4%. The hydrologic residence time of the take was about three months, and the floodplain made a net contribution of water to the river. The exported volume (net balance between water input and tosses) varied between 4.2 and 7.3 km(3) depending on the year and represented about 0.75 times the maximal storage reached each year. |
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| 1 : | Laboratoire des Mécanismes et Transfert en Géologie (LMTG) |
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CNRS : UMR5563 – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III – Institut de recherche pour le développement [IRD] : UMR154 |
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| 2 : | Donald Bren School of Environment Science and Management |
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University of California, Santa Barbara |
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| 3 : | Instituto de Geociéncia |
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Universidade de Brasilia |
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| 4 : | Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) |
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CNRS : UMR5566 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 5 : | Territoires, Environnement, Télédétection et Information Spatiale (UMR TETIS) |
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Centre de coopération internationale en recherche agronomique pour le développement [CIRAD] : UMR91 – CEMAGREF-UR LCMO – Ecole Nationale du Génie Rural des Eaux et Forêts |
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| domaine | : | Sciences de l'environnement/Environnement et Société |
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| Liste des fichiers attachés à ce document : | |||||
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| ird-00270979, version 1 | |
| http://hal.ird.fr/ird-00270979 | |
| oai:hal.ird.fr:ird-00270979 | |
| Contributeur : Emmanuel Roux | |
| Soumis le : Mardi 8 Avril 2008, 09:32:53 | |
| Dernière modification le : Vendredi 11 Avril 2008, 17:02:57 | |
