An integrated approach with remote sensing, Geographic Information Systems (GIS) and morerntraditional fieldwork techniques was adopted to map the groundwater potential sites in the centralrnrift valley area of Northern Ada`a Plain (Modjo Catchment). Catchment delineation was done inrnILWIS 3.3 DEMHYDROPROCESSING module. Digital image processing of enhanced color fromrnLandsat ETM+ was interpreted to produce thematic maps such as lithology, lineaments, landrnuse/cover and geomorphology. Contours and drainage lines were digitized for slope and drainagerndensity mapping. GIS analysis of distance for lineaments, density for drainage, slope for elevationrnand reclassification were done for each factor maps. Selected springs and wells were visited tornstudy their topographic and hydrogeological setting. Digital Elevation Models (DEM) derivedrnfrom contours and acquired in the Shuttle Radar Topographic Mission (SRTM V-3) wererncompared in relation to drainage and lineaments extraction, landform mapping and catchmentsrndelineation. DEM derived from SRTM V-3 using DEMHYDROPROCESSING are better forrncatchments delineation and landform mapping than those derived from contours. A model thatrnincorporates Weighted Linear Combination (WLC) was built using ARCGIS 9 model builderrnengine. The model was executed and groundwater potential map was generated. The spatialrndistributions of the various ground water potential zones obtained from the model generally showrnregional patterns of lithology, landform and lineaments. Spatially the very good and goodrncategories are distributed along plain geomorphic units, near to lineaments, less dense drainagerndensity and where the lithology is affected by secondary structure and having interconnected porernspaces. Groundwater potential zones demarcated through the model are in agreement withrnborehole data collected from the area. The validity of the model developed was tested against thernborehole data, where out of 107 boreholes 50 are on very good and good zones, 37 on moderaternzones, 14 on fair and 6 on poor zones. Moreover out of 52 bore holes with discharge rate from 24rnl/s to 69 l/s are on the very good and good zones, which reflects the actual ground water potential.rnAlthough some wells exist in all ground water potential zones, the best yielding wells lie in the veryrngood and good ground water prospect zone. The results demonstrate that the integration of remoternsensing, GIS, traditional fieldwork, and geomorphology provide a powerful tool in the assessment andrnmanagement of water resources and development of groundwater exploration plans.