Modelagem do escoamento e transporte de sedimentos em parcelas sob chuva simulada

• Autor(a) principal: PEREIRA JÚNIOR, Caetano Cláudio
• Data de Publicação: 2011
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFRPE
• Texto Completo: http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5568
• topic: Escoamento; Erosão; Produção de sedimentos; Modelos hidrossedimentológicos; Erosion; Flow; Sediment yield; Models hydrosedimentological; CIENCIAS AGRARIAS::ENGENHARIA AGRICOLA

The predicted runoff and soil erosion in semiarid basins is essential in planning, management and exploitation of natural resources. Physically based hydrological models that can consider the effects of changes in land use constitute excellent tools to that end. This study has evaluated the model parameters for Kineros2 at Mimoso Representative Basin (BRM) in city of Pesqueira, Pernambuco, through the calibration of numerical simulations, seeking the best representation in the processes involved in the flow. In the study area there are 18 plots, each plot with 1 x 3 m, with different types of vegetation. Each plot received a total of three simulated rainfall, which generated 42 events with production of runoff and sediments. The parameters of water distribution in soil G (capillarity) and similarly the parameter cf, which is on the calculation of erosion by impact of raindrops, were calibrated for each event, until the values of flow production and drained calculated sediment were close enough to the values observed. In this study, the coefficient of determination of Nash-Sutcliffe results for runoff ranged between 0.47 and 0.92, 88% of the analyzed events, with an average value of 0.61. The results of this study can be considered satisfactory, due to the reduced dimensions of the study area low and when compared with other works from literature.