Integrated geoelectrical resistivity and geochemical survey to study groundwater -A case study from Selangor, Malaysia

Abstract

Integrated two-dimensional Electrical Resistivity Imaging (ERI) and hydrochemical surveys carried out to investigate and delineate a groundwater alluvial aquifer in the Kuala Langat, Malaysia. Resistivity method developed to investigate and delineate a groundwater aquifer in the Paya Indah Wetland. The electrical resistivity imaging surveys conducted to measures and maps of the resistivity subsurface materials. These techniques are applicable for the detection of subsurface formations, groundwater zones and also groundwater quality. A Wenner electrode array was successfully performed along and perpendicular together with length of 400 m and electrode space of 5 m. Chemical analysis of the groundwater samples from 5 boreholes were collected on May 2013. The region of fresh water is extremely obviously seen in the resistivity inverse model with the position around 20 m of depth. Results obtained from resistivity modeling as well as the hydrochemistry of the groundwater samples demonstrate that the soil and groundwater in the study area is a mixture of fresh and brackish water zones.