Integrated Geophysical Methods for Sensing Buried Wastes in Abandoned Gravel Pits near Barcelona (Spain)

The industrial expansion of Barcelona city and their metropolitan area of influence during the sixthy's and seventy's gived as consequence an important inquiry for building materials. Many gravel-pits were intensively exploted, and when abandoned, converted into uncontrolled landfills refilled with industrial and domestic wastes (fig. 1).