Recent progress in estimating suspended sediment yield variability in the Amazon River
Jean Loup
Guyot, IRD Peru, jloup@amauta.rcp.net.pe
(Presenting)
Naziano
Filizola, ANA Brasil, naziano@ana.gov.br
Alain
Laraque, IRD France, Alain.Laraque@mpl.ird.fr
The Amazon river sediment load to the Atlantic Ocean have, until present, been calculated starting from a restricted sampling, carried out through a dozen hydrological campaigns. In 1995, program HIBAM (ANA-CNPq-IRD-UnB) installed a network of 10 reference stations in Brazilian Amazonia, with a decadal sampling, to apprehend the temporal variability of the dissolved and particulate fractions during the hydrological cycle, on the main tributaries of the Amazon river. Coupling this decadal surface sediment sampling data with detailed depth sampling at different hydrological period, we propose a new approach to estimate total sediment yields from large Amazonian rivers. Results obtained at the gauging station of Óbidos (Pará, Brazil) - the last gauging station on the Amazon before its mouth - allow to estimate with more precision matter yields to the Ocean.
Submetido por Guyot Jean Loup em 18-MAR-2004
Tema Científico do LBA: SH (Hidrologia e Química das Águas)