Groundwater potential and quality mapping using GIS-RS modeling and Vertical Electrical Soundings (VES) in El-Hamiz Sub-watershed, Algiers, Algeria.

Abstract As climate change continue to become more severe, water supplies are becoming scarce and groundwater is becoming more and more exploited worldwide. Groundwater exploration relies mainly on hydrogeological studies and geophysical techniques (electrical methods). Although this technique is inexpensive, easy to implement, and not time consuming, it can be challenging to perform due to topographic effects or small area heterogeneities. Generally, a field trip is scheduled prior to any geophysical survey to scout the area of interest and locate the VES points on site. This costs time, money, and effort. The use of GIS and Remote Sensing analysis of the study area can facilitate the identification of appropriate areas for geophysical surveys. In addition, the final result of groundwater potential is useful in defining areas where VES can provide maximum and accurate results on groundwater occurrence and quality. this study concern groundwater exploration in el-hamiz sub-watershed part of the eastern Mitidja, Algiers. GIS-RS model was developed to highlight the groundwater potential zone and locate VES location. Furthermore, VES data determined the aquifer’s parameters and highlighted a saline pollution.