Robson Willians da Costa Silva

Emprego do método da eletrorresistividade no estudo da contaminação subterrânea do cemitério municipal de Vila Rezende, Piracicaba - SP

This paper presents the results of the application of electrical resistivity method in the delineation of areas potentially impacted by necrochorume in Vila Rezendes municipal cemetery, Piracicaba - SP (Brazil). The results indicate a depth of water table among 3.1 and 5.1 m in drought, with two flow directions: a SW and another to the SE. Also indicate unfavorable conditions in subsurface to percolation of necrochorume but favorable to the corpses phenomenon saponification. The probable contamination plumes have the same directions of the groundwater flow. The probable plume is prolonged to out of the cemetery. The location of the conductive anomalies and likely contamination plumes demonstrated that the contamination is linked with the depth of water table level and the burial time. The electrical resistivity method has proved to be an important tool for assessing the environmental quality in cemeteries.

O emprego de métodos geofísicos na fase de investigação confirmatória em cemitérios contaminados

Inside of the administration of contaminated areas, the application of geophysical methods, in studies of contaminated area, constitutes a confirmatory methodology. This procedure - more precisely the electrical resistivity method through the techniques of the vertical electric sounding and electrical imaging techniques, was applied at Vila Rezendeâ€TMs cemetery, Piracicaba, Sao Paulo, Brazil, to investigate and to map the contamination of the cemetery for necrochorume. The results indicate a depth of water table among 3.1 and 5.1 m, with two flow directions, being one to SW and another to SE. So the probable contamination plumes, that have the same directions of underground flow, as for the conductive anomalies verified at the geoelectrics sections confirm the suspicions of contamination in the area.