New perspectives in monitoring water resources in large tropical transboundary basins based on satellite imagery and radar altimetry.

摘要: The combined use of remote sensing and radar altimetry is offering entirely new perspectives for the monitoring water resources in large tropical trans-boundary basins. Based on a study conducted mostly region Llanos de Mojos, complex wetlands located within southernmost extension Amazon Basin, at Brazilian border with Bolivia Peru, but also based previous studies, we give some results that will illustrate this point view. First, are showing current limitations altimetric missions, which were designed primarily ocean level or ice caps studies: essentially revisit time, size bodies can be monitored, lack reliable data presence relief. Nevertheless, they show processing tools developed to select appropriately data, allow retrieving quite accurately seasonal variability elevation basin selected. Second, stating absolute necessity coupling these images, order retrieve useful information hydrologic behaviour very system. common altitudinal reference missions opening modelling opportunities, as river slope key parameter hydrodynamical studies. Last, spatial distribution reachable nowadays, offered by future sensors, going forward global, detailed capability floodplains, well their relationship flow. applications resulting from importance poorly gauged basins, review conclusion them, infrastructure planning, flood drought forecast, fluvial waterway transport dynamics riverbed discharge modelling.