ESTIMATE SOIL LOSS THROUGH SURFACE EROSION USING GEOGRAPHICAL INFORMATION SYSTEMS AND SATELLITE IMAGES PUBLISHEDLoredana COPĂCEAN, Silvica ONCIA
Quantitative estimation of surface erosion of the soil, is not a current topic, the approach a working methodology for this purpose is temporal "localized" in 1950, when some researchers from the National Runoff and Soil Loss Data Center and Purdue University have made an empirical equation for the quantitative determination of eroded soil. In 1978, Wischmeier and Smith, gives Universal Soil Loss Equation (USLE), an equation designed to calculate the annual mean soil loss from agricultural lands. This study aims is to estimate the amount of annually soil lost by surface erosion, using specific methods and Geographyc Information Sistems data, in the administrative territory Traian Vuia, Timis County. The values of the equation coefficients were taken from the literature, under specific environmental conditions of the study area. For the calculation of some of the factors they were used satellite images. For the said territory, the average annual of soil loss through erosion ranges from 0 to 72.46 t/ha/year, these values having territorial distribution depending on the environmental conditions of each subunits. Given that data and maps were used to average scale, in the micro-regions, surface erosion can occur with greater intensity. The large number of methods of determination, but also, large differences in coefficient values used, can be detected by quantitative differences in the estimations.
estimation, erosion, informatics, soil