Mapping shallow groundwater aquifer by performing high-resolution seismic reflection technique in Wadi Nisah

Abstract

This study was carried out in Wadi Nisah in south-west of Riyadh, Saudi Arabia, at latitude of 2of 24° 14' 28 N and longitude of 46° 29' 59 E. The main objectives of this study are to investigate the depth of the shallow groundwater aquifer and the geological structures that could affect the ground water bearing layer in the area. Six 2D seismic lines were acquired in the study area. Since the complex subsurface structure of the area, a high-resolution seismic reflection technique was performed along the lines and one meter spacing between the receivers was applied. The seismic sections revealed that the depth of the water bearing layer lies in the range of 100m to about 240m. In addition, the results show faulting that affect the surface of the water bearing layer in the study area. We have found that high resolution seismic reflection Technique can be an effective method for determining water bearing layer depth in study area. This formation is correlated with Biyadh Formation as confirmed by the drilled near water wells.