Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6348485 | International Journal of Applied Earth Observation and Geoinformation | 2016 | 9 Pages |
Abstract
The spatio temporal variability of MODIS NIR/R together with rainfall estimated by the Tropical Rainforest Measuring Mission (TRMM) and altimetry data from Jason-2 is analyzed over the Bagre Reservoir for the 2000-2015 period. It is found that rain events of the early rainy season (February-March) through mid-rainy season (August) are decisive in triggering turbidity increase. Sediment transport is observed in the reservoir from upstream to downstream between June and September. Furthermore, a significant increase of 19% in turbidity values is observed between 2000 and 2015, mainly for the July to December period. It is especially well marked for August, with the central and downstream areas showing the largest increase. The most probable hypothesis to explain this evolution is a change in land use, and particularly an increase in the amount of bare soils, which enhances particle transport by runoff.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Computers in Earth Sciences
Authors
Elodie Robert, Manuela Grippa, Laurent Kergoat, Sylvain Pinet, Laetitia Gal, Gérard Cochonneau, Jean-Michel Martinez,