This paper proposes a case study of a degraded area in the Água da Veada stream watershed, in the municipality of Ourinhos/SP. The site has water erosion in the form of gullies and gullies, triggered by urbanization and consequent degrading anthropic action. The study therefore aims to understand the spatio-temporal evolution of the erosion process and assess the changes in the soil's physical properties over the course of the erosion. To this end, the progress of the gullies and gullies was monitored every rainy season and physical and granulometric indices were determined by sampling soil profiles from the erosion walls. Thus, considering all the aspects analyzed, the lack of adequate urban planning culminated in the modification of the landscape, the intensification of the erosion process over time and the silting up of the Água da Veada stream, in addition to the total de-characterization of the soil's physical properties, compromising the capacity for land use in this area.