Investigação da subsuperfície rasa na área do Parque Ambiental de Belém-PA

Inductive electromagnetic and resistivity measurements were carried out in the Parque Ambiental de Belém, where the municipal surface water supply reservoir is located. The measurements were performed to verify if the water reservoir can be reached by contamination via shallow subsurface. Correlation of the geophysical data to the lithology of monitoring wells showed that: (a) shallow clays have high resistivity and can be mistaken to sandy material in the geophysical interpretation; (b) the electromagnetic <br>data give excellent answer in mapping clayed and sandy units; (c) there is a low probability for underground contamination of the water reservoir.