标题：APLICAÇÃO DE IMAGENS DO RADAR INTERFEROMÉTRICO (SRTM) NA AVALIAÇÃO DA FRAGILIDADE DA BACIA DO CÓRREGO CACHOEIRINHA, NOS MUNICÍPIOS DE CÁCERES E PORTO ESTRELA /MT / THE USE OF SHUTTLE RADAR TOPOGRAPHY MISSION (SRTM) IMAGES TO EVALUATE THE ENVIRONMENTAL VULNERABILITY OF CÓRREGO CACHOEIRINHA WATERSHED, BETWEEN THE MUNICIPALITIES OF CÁCERES AND PORTO ESTRELA /MT
摘要：The environmental analyses, on the geographical approach, provide technical and scientific support for thezoning generation, used in environmental planning. In this perspective it’s necessary to evaluate theenvironmental vulnerabilities within the ecodynamical conception (Tricart, 1977), based on systems theory.One of the widely used evaluation methodologies, not only in the geographical environment, is the UniversalSoil Loss Equation (USLE), using maps to spatialize and quantify its factors. Whereas progress have beenmade in the generation of Remote Sensing products, through new sensors, this paper proposes the use ofSRTM elevation data to generate one of the USLE factors, the Lenght-Slope map. The studied area wascórrego Cachoeirinha watershed, located in the municipalities of Cáceres and Porto Estrela, Mato Grosso- Brazil. The implementation involved the drafting of rainfall erosivity, soil erodibility, lenght-slope factor,crop/vegetation factor and support practices maps. These maps were combined in ArcGis, allowing thequantification of soil losses in the watershed and the determination of different fragility degrees, in conformitywith the classification proposed by UNESCO (1980). The LS map generated from SRTM revealed moredetails on the hillside shapes. It’s emphasized the greater agility to produce the soil loss maps, consequentlythe vulnerability, using SRTM.
