AVALIAÇÃO MORFOMÉTRICA E BIOFÍSICA DA BACIA HIDROGRÁFICA DO RIBEIRÃO DA LAJE, RIO VERDE, GOIÁS.

Abstract

Water resources are essential for human life, both for supply urban, as well as for the development of agricultural and industrial activities. The contamination by domestic sewage, occupation of river banks and deforestation has been causing numerous environmental impacts. In this sense, the National Policy of Water Resources establishes water resources management as one of its guidelines. The use of geoprocessing as a watershed management tool has great potential, as it allows a spatio-temporal analysis of the basins to a low cost. Therefore, this study aimed to evaluate the morphometry and indices biophysicists from the Ribeirão da Laje hydrographic basin in Rio Verde, GO, through geoprocessing techniques. It was possible to verify that the study area has an area of 431.55 km² and a perimeter of 141.1 km, so it has a format longer, not favorable to flooding, being classified as 4th order. The basin has a soft undulating relief, being predominant for activities agricultural, where they are an influential class in the basin, as it has a class of 78.23% in land use, influencing the vegetation indices by difference normalized (NDVI - Normalized Difference Vegetation Index) and albedo in the periods of dry and rainy. The NDVI showed a greater variation in the rainy season in vegetation classes and built-up area, in the dry period it presented a greater variation in the vegetation and agriculture classes. The albedo showed few changes in the rainy and dry periods in the vegetation and construction classes, as the areas of agriculture showed a 38% reduction in albedo during the dry season. way Overall, it is possible to understand the behavior of the watershed and distinguish areas with anthropogenic impacts with natural vegetation, enabling low-cost management of the same.