Geophysical investigation of construction waste and landfill site

Geophysical survey methods used in combination provide the most integrated solution for the identification of subsurface conditions. The model can be verified and calibrated with borehole data. A combined geophysical survey using refraction seismic and electrical resistivity tomography was conducted at a construction waste and landfill site in United Arab Emirate. The survey was performed mainly to determine the thickness of the landfill and the depth of the bedrock. According the geophysical results, location for boreholes was recommended. All geophysical results (seismic refraction and resistivity) are verified by the results obtained from boreholes. The result of the resistivity survey illustrates the heterogeneity of the landfill material. The bedrock layer showed no strong change of the resistivity values compared to the overburden materials. Applying the refraction seismic technique, a contour map of the bedrock surface was developed which showed clearly the depth variations of the bedrock surface in the survey area