Remote Sensing technology in this century is widely used in survey and very effective in identification of potential zones for groundwater exploration. In the study area the main rock types are schist, gneisses and quartzite Precambrian terrain of Khor Al Alabyad, Sudan. The main landform units in this area are valley fills lower and upper relief. Occurrence of groundwater in hard rock terrain is mainly controlled by structures, landforms, lithology and recharge conditions. The subsurface column consists of three resistivity layers, which obtained from upper to lower are composed of very dry superficial deposits, followed by an intercalation layer of weathered and fractured basement, then an impermeable hard basement complex respectively. Spectral resolution and geo-electrical resistivity survey has the potential to infer structures as well as lineaments and faults in this hard rock area. It's essential to identify the location of interconnected lineaments below buried channel plains in the hard rock area for targeting subsurface groundwater occurrence is more dependent on fractures. Generally groundwater potential is good in the valley fills and poor in the upper relief, but specifically the target zones are indicated by overlap of the high-intensity lineament contours and low-intensity drainage contours. Therefore, the lineaments can be very helpful in sitting successful wells at zones (C and B) which exhibited a higher lineament density and frequency compared to the other zones.

Remote Sensing, Fractured Basement, Groundwater, Khor Al Alabyad, North Kordofan, Sudan