Application of the SWAT hydrological model in flow and solid discharge simulation as a management tool of the Indaia River Basin, Alto São Francisco, Minas Gerais

Measurement and evaluation of soil erosion consequent sediment yield are fundamental in the planning management watersheds, as they allow identification critical areas susceptible to erosive processes. This study analyzed generated by water Indaia River Basin, Alto São Francisco, Minas Gerais, using SWAT hydrological model. From a regional/local scale, initial simulation variables (flow solid discharge) was performed on monthly scale from 1988 2017. Then, parameter-sensitivity analysis, calibration, validation model were executed. In calibration (1988 2007), performance simulations for flow R2=0.92 NSE=0.91 total discharge R2=0.51 NSE=0.50. (2008 2017) flow, R2=0.85 NSE=0.82 obtained R2=0.19 NSE=0.16. Despite unsatisfactory result stage, able analyze distribution production sub-basins or even Hydrologic Response Unit (HRU). Therefore, sediment-yield map which qualitatively indicated tendency greater processes central portion basin. The results will support public policies mitigating environmental degradation Basin.