Impactos das alterações de uso e ocupação do solo considerando a variabilidade climática e hidrológica na região do semiárido.

Abstract

The land use associáted with climate variability in semiarid regions directly influence hydrosedimentological regime o f small wátersheds strictly rural. The fiíth assessment report of the e Intergovernmental Panel on Climate Change IPCC) warned on extreme weather and climate phenomena caused by droughts and heavy rainfall events. In the Brazilian semi-arki rural areas are primarily occupied by farmers who have their production mode based on rainfed crop and livestock strongly on subsistence dependent climate thus being a region very vulnerable to climate change Average climatic anomalies of precipitatíon for the períod 2040-2069 projected by six IPCC’s climate models were used to characterize future climate. This Work aims to diagnose the impact of climate change on the runoff and sediment yield in a small watershed using computational tools such as platform SegHidro and the SWAT model (Soil and Water Assessment Tool). The results show a reduction in rainfall and consequent reductions in the surface runoff and sediment yield in the basin.