Erosión y desertificación.-Retroceso erosivo en la cuenca del río Nacimiento en la Vega Baja del Segura: Evaluación y seguimiento utilizando herramientas SIG

Abstract

ABSTRACT In this paper, we are tried to know the most significant erosion processes that affect the study area selected in the last 50 years, according to the different land uses in the study area, as well as the lithologic formation of them. To do this we have used GIS technology (Geographic Information Systems) to compare the erosion processes of the different periods of study and for data collection in a thematic cartography. Generally are reliefs that are colonized by natural vegetation, but the main area are soils that have been deforested and plowed. Will be in the latter ones which will generate more concentrated runoff and soil loss. In the comparative analysis between the different frames, we observed that the anthropic practices have degrees of erosion and loss of superficial material alarming. Erosion processes are more pressing in cultivated soils where runoff concentrated in rills, gully erosion, piping processes and off the slopes are the most evident expressions of loss of soil.