ANALYSIS OF SUSCEPTIBILITY TO LAMINAR EROSION IN THE RIO MANSO BASIN, CHAPADA DOS GUIMARAES, MT, USING GEOGRAPHICAL INFORMATION SYSTEMS

The erosion has been recognized as a serious global problem of land degradation and a threat to the well being of humanity. The misuse and land, without regard to their capacity for renewal, have led to losses by increasing erosion causing disorders often irreversible character. The Manso Reservoir, located on River Basin Manso - BHRM has suffered from problems of siltation, which, caused by sediment transport from the headwaters of the basin, represent a threat to the life of the container. This work aimed to study the susceptibility to extensive erosion of River Basin Manso through geoprocessing techniques indicating the areas most susceptible to erosion, and its relationship to erosion of the soils, allowing alternative future management, restoration and conservation land basin. Were defined three main classes of degrees of susceptibility to erosion, and approximately 80% of the basin are located in low-potential class, about 16%, the class of potential and average about 2% in the high potential for erosion. Classes medium and high potential were located mainly at the edges of the basin, in areas that promote greater production of sediments, which are carried into the reservoir. These areas of medium and high potential are generally more precipitous in the reliefs found in the basin, more steep slope classes with strong and very strong (> 20%) in soils considered extremely susceptible to erosion.