SENSIBILITY OF DISTRIBUITED BIOSPHERE-HYDROLOGICAL MODEL TO HYDRAULIC SOIL PROPERTIES FOR A SMALL BASIN OF WOODLAND SAVANNA
DOI:
https://doi.org/10.5902/2179460X20285Keywords:
Basin. Hydrological model. DBHM. Precipitation.Abstract
For modeling of hydrologic processes that occur on the scale of watersheds to characterize the availability of water in it, you need a physical model that can represents the topography, vegetation and soil characteristics. On the other hand, the variables that provide atmospheric forcing require great accuracy and models are sensitive to them mainly to rainfall, it is the main input in hydrological modeling. This study focuses on evaluation of four physical parameters of soil in hydrologic modeling in Giant Foot basin, SP, Brazil with DBHM model. The study period covers the years 2009-2014, FAO’s soil maps were used for the physical characterization of the basin, and the MODIS for vegetation data (LAI and FPAR). Domain of 500 m for spatial resolution in a basin area of 11.94 km2. Was used a basic configuration that let determine the influence of soil parameters in the water content results for the surface layer up to 1 m. It shows higher water retention in the soil to high values of the Campbell parameter, matric potential and porosity; sensitivity to hydraulic conductivity depends on the relationship with the daily accumulated rainfall.
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