Estudos da produção de sedimentos em um afluente do Rio Teles Pires

Abstract

The objectives of this dissertation were to evaluate the sediment yield of different scenarios and the preliminary calibration of the MUSLE coefficients in an Amazon basin. Mapping of soil erodibility factor, topographic factor and use factor and soil occupation were generated. Data were collected from meteorological, fluviometric, pluviometric, turbidity and water / sediment sample collections from the Caiabi River, a tributary of the Teles Pires river. The modified soil loss equation with geographic information system was applied. As results were obtained the areas that have the most susceptibility to erosion in the Caiabi River watershed (MBHRC), the soil erodibility factor K was the preponderant parameter of erosion potential of MBHRC, which in the analysis of scenarios the conversion of forest area for alternative land use did not generate an increase in sediment yield when the forest was found to be in an inadequate surface condition. The preliminary analysis of the calibration of the MUSLE coefficients for the MBHRC showed that application with the original coefficients underestimated the sediment yield in all the estimated events. The MUSLE used with GIS produced adequate results for evaluation of sediment yield, and the calibration of the MUSLE coefficients can improve the estimates for the MBHRC.