Calibração e validação do modelo de grandes bacias MGB-iph para a bacia do Alto Teles Pires

Abstract

The population growth, along with economic development and consequent demand for food, fiber and energy has inflicted strong pressure on water resources in agriculture. In order to manage water resources in such scenario, the use of models as a tool to support the decision making process in watersheds is paramount. In this sense, one of the main tools for water resources management and simulation is hydrological models. hydrological models allows the assessment of hydrological dynamics in watersheds, which enable the analysis and forecasting of water availability and demand. The aim of this study was to evaluate the performance MGB-IPH hydrological model to assess water resources in Alto Teles Pires watershed. As input data, we use the Digital Elevation Model (MDE), maps of land use and cover, soil types, as well as data from climatological station. The MGB-IPH model calibration and validation were performed for three stream flow stations and based on the statistical parameters of Nash-Sutcliffe (NS) and its logarithm form (NSLOG), as well as in percentage error of volume (ΔV) we found that the MGB-IPH model was capable of simulating the hydrological behavior of Alto Teles Pires watershed, showing a good fit between observed and simulated stream flow discharge.