Work recently published in Nature announces a significant correlation between sediment deposition in two Bolivian rivers, which flow into one of the principal tributaries of the Amazon, and climatic events of the ENSO (El Niño Southern Oscillation) type. It is the fruit of a research partnership between the IRD, the Bolivian Meteorology and Hydrology Centre in La Paz and scientists from the universities of Washington and California. The results represent a major advance in the study of the Amazon Basins hydrology and geochemistry dynamics since the beginning of the XXth century (the HYBAM programme). They further more particularly knowledge of the impact of climatic variability on the processes controlling the sediment transport and deposition between the Andes and the Atlantic Ocean. They also provide useful clues for predicting strong flooding events in this region.
The Amazon Basin in figures…
- 6 million km_ -representing 5% of the Earths exposed land surface,
- 7 countries: Brazil, Peru, Bolivia, Colombia, Ecuador, Venezuela, French Guiana - annual average discharge rate of the Amazon: 209 000 m3/second
Bénédicte Robert | EurekAlert!
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