Abstract
This paper presents the results of the study of the erosion phenomena in the córrego do Espraiado basin, located NE of the city of São Pedro (São Paulo). This study belongs to an investigation programme, which aims the preparation of the engineering geological map of that area. A brief characterization of the area (climatic conditions, vegetation, geomorphology and geology) and the map of unconsolidated materials are presented. Attention is drawn to the water erosion process, which is the main environmental problem in the area. The evolution of the water erosion process along 30 years is investigated based upon the data registered in four distinct temporal situations: 1972, 1978, 1995 and 2002. Finally, the influence of the anthropic action in that respects triggering or accelerating the evolution of that process is pointed out.
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