Delineation of Ground Water Potential Zones Using GIS and Remote Sensing Techniques in the Case of Korahe zone, Somali regional state, Ethiopia
Abdo Wudad, Dereje Biru, Ashenafi Darcho, Endris Mohammed, Fekadie Bazie
Abstract
The integration of GIS and remote sensing was applied to delineate ground water potential zone by interpreting nine thematic layers. The parameters like drainage density, elevation, geology, geomorphology, land use and land cover, lineaments, rainfall pattern, slope gradient and soil texturewere used for identification of ground water potential within the study area. The selected parameters are prepared and classified in the GIS environment, then the analytical hierarchy process is used to assign weights to each parameter and its class, and finally the results are found in the weighted overlay analysis that is common in ArcGIS. The result of the study reveals that, about 169631.71ha (4.89%) of the study area having very high,334818.58ha (9.65%) having high, 587658.05ha (16.93%) having moderate, 1194164.18ha (34.41%) having low and 1184005.67ha (34.12%) having very low potential of ground water. The integration of GIS and Remote sensing technique in ground water analysis from various thematic maps proves to be very important to map the groundwater occurrence and movement for recharge potential mapping and management plan on a scientific basis in the study area.