Pfeffer Julia auteur aut IRD Seyler Frédérique auteur aut IRD Bonnet Marie-Paule auteur aut IRD Calmant Stéphane auteur aut IRD Frappart F. auteur aut IRD Papa Fabrice auteur aut IRD Paiva R. C. D. auteur aut IRD Satge F. auteur aut IRD Da Silva J. S. auteur aut IRD text journalArticle eng text/pdf born digital access Groundwater plays a fundamental role in rainforest environments, as it is connected with rivers, lakes, and wetlands, and helps to support wildlife habitat during dry periods. Groundwater reservoirs are however excessively difficult to monitor, especially in large and remote areas. Using concepts from groundwater-surface water interactions and ENVISAT altimetry data, we evaluated the topography of the groundwater table during low-water periods in the alluvial plain of the central Amazon. The water levels are monitored using an unprecedented coverage of 491 altimetric stations over surface waters in the central Amazon. The groundwater table maps interpolated at spatial resolutions ranging from 50 to 100 km are consistent with groundwater wells data. They provide evidence of significant spatiotemporal organization at regional scale: heterogeneous flow from the hillslope toward the main rivers is observed, as well as strong memory effects and contrasted hydrological behaviors between the North and the South of the Amazon. specialized groundwater Amazon radar altimetry AMAZONIE 062 126 41 6 1981-1987 2014 0094-8276 https://www.documentation.ird.fr/hor/fdi:010061954 10.1002/2013gl059134 0094-8276 [F B010061954] https://www.documentation.ird.fr/hor/fdi:010061954 https://www.documentation.ird.fr/intranet/publi/2014/05/010061954.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2014-05-28 2021-04-07 fdi:010061954 fre