DELINEAMENTO DE ÁREAS COM POTENCIAL EROSIVO PARA A BACIA HIDROGRÁFICA DO RIO PARANAÍBA (PN1-IGAM)

Abstract

The identification of the erosive potential of area before it manifest it self of great importance to mitigate the risky circumstances and to avoid demages to the use of the ground. The aim of this work was to identify the áreas with the greatest potential to undergo erosive processes in the PN1 Hidrographic Basin (the Minas Gerais Water Management Institute divided the area of the Paranaíba River Basin in MG in PN1, PN2 and PN3). Through the use of Remote Sensing and Geographic Systems, the most sensitive áreas to na erosive process were identified, as wall as the manipulation of the variables inherent in this process, which operate in the basin. The soil types, land use, relief and other parameters required to understand erosion dynamics in the basin and calculated the Universal Soil Loss Equation (EUPS) for the diferente land use scenarios were evaluated. In order to obtain the results, erodibility and erosivity maps were elaborated to give an indication of the main areas of erosive risk in each use scenario. The results were presented for the erosive potential, were applied in a qualitative way, with the use and where they are not used conservationist practices. As a result, erodibility and erosivity maps were elaborated that allow the indication of the main áreas of erosive risk in each use scenario.

Keywords: Basin Hydrographic; Soil; GIS; Soil Conservations; Erosion.