USO DE DADOS METEOROLÓGICOS DE REANÁLISE PARA A SIMULAÇÃO DA VAZÃO NA BACIA HIDROGRÁFICA DO RIBEIRÃO DO PINHAL, LIMEIRA/SP

Abstract

The great concern with the preservation of water resources demands studies capable of evaluating and mitigating the impacts resulting from anthropic actions. The use of hydrological models is an important tool, since they allow simulating different scenarios and their impacts on the hydric availability. However, the complexity of obtaining observed meteorological data makes necessary the use of other data sources.  This research work aims to assess whether the Soil and Water Assessment Tool (SWAT) model can be calibrated with reanalysis meteorological data obtained from the Climate Forestcast System Reanalysis (CFSR) model. The study area is the Ribeirão do Pinhal watershed (BHRP), located in the town of Limeira-SP. The SWAT model was used for hydrological simulation with the observed meteorological data and for reanalysis data. It was possible to calibrate the SWAT model using the observed meteorological and reanalysis data. However, the adjustment was better when the observed meteorological data were used. Simulated flow using reanalysis data was overestimated. The reanalysis meteorological data are suitable for hydrological simulations with the SWAT model, which is evidenced by the satisfactory statistical indices obtained in the SWAT model calibration procedure.