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- W4385434595 abstract "Reservoir-building on rivers is still the Brazilian energy culture, such that many other dams are being constructed and planned, with many other rivers potentially suffering the same impact in their sediment flux. In this study, we evaluated the impacts of reservoir-building on the erosion of the São Francisco, Jequitinhonha, Doce, and Paraíba do Sul river deltas. A time series of Landsat images from 1973 to 2020 was analyzed, with three key highlighted moments (1973, 1997 and 2020) that summarize the erosion processes on these deltas. In addition to the images, continuous river water discharge, sediment discharge and basin rainfall data were analyzed between 1940 and 2020, providing river parameters over a period exceeding that of the satellite data. The findings suggest that coastal erosion has progressed in the four deltas, with higher estimated losses in the São Francisco and Paraíba do Sul over the 47 years of available satellite images. However, despite minimal overall estimated gains, the Jequitinhonha and Doce experienced high erosion at their river mouths, as in the other two rivers, compensated by accretion in distal coastal areas. These results can be explained by reductions in river flux and consequent sediment transport capacity due to reservoirs." @default.
- W4385434595 created "2023-08-01" @default.
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- W4385434595 date "2023-01-01" @default.
- W4385434595 modified "2023-10-01" @default.
- W4385434595 title "Erosion of four Brazilian coastal deltas: how dam construction is changing the natural pattern of coastal sedimentary systems" @default.
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- W4385434595 doi "https://doi.org/10.1590/0001-3765202320220576" @default.
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