Abstract
The La Plata basin is one of the largest river basins in the world, draining about a fifth of the South American continent. It is a system of great hydrological significance, sensitive to extreme events, and also has the most economic development in the region. This work analyses the terrestrial water storage (TWS) changes over the La Plata basin from the GRACE mission and compares it with TRMM rainfall data. Subsequently, a study was conducted on the main sub-basins for the period 2003-2017 to identify regional-scale variations in TWS. Precipitation and GLDAS run-off data were evaluated in these areas, along with their connections to ENSO episodes. The results suggest that the majority of TWS variations are associated with extreme climatic events, such as the 2009 drought, and are linked to ENSO periods. The statistical analysis indicates a significant correlation between severe Niño/Niña episodes and changes in TWS in the sub-basins.
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