This study was carried out at Habeel Salman, Wadi Rudagah and Al Hawjalah sites located west, east and north of Taiz City, respectively. Fifteen vertical electrical sounding stations were conducted in the study area by using Schlumberger configuration while the ground magnetic survey was conducted at Al Hawjalah site which contains one of the groundwater well fields that provide the city by the water.
The results of this study indicates the existence of two groundwater aquifers, the shallow aquifer composed of quaternary deposits and weathered volcanics and the deep aquifer composed mainly of highly fractured volcanic rocks. During the Cenozoic, These aquifers are structurally controlled by intense faulting affecting the area due to the emplacement of Yemen volcanic group , the opening of the Red Sea and the Gulf of Aden which resulted in the formation of successive series of grabens and horsts.