Eyasu Tafese Mekuria*
The demand for an investigation of groundwater is occasionally increased by the ever-increasing population and abrupt climatic changes. Groundwater is currently the most important source of fresh water, and many researchers are attempting to cover all aspects of this resource in order to achieve sustainable development. This scientific and academic research and studies are attempting to present a multi-range of techniques and methods focusing on groundwater pollution, potentials, assessment, and prediction. To delineate Groundwater Potential (GWP) zones in the lower Omo-Gibe Watershed, Omo-Gibe Basin, Ethiopia, an integrated strategy of Remote Sensing (RS), Geographic Information Systems (GIS), and Multi-Criteria Decision Analysis (MCDA) using Analytical Hierarchical Process (AHP) was used. For this purpose, seven GWP influencing thematic layers comprising lineament density, slope, soil, drainage density, landuse landcover, geology, elevation and rainfall map were used. Scale values for the classes and thematic layers within them were determined using Satty's AHP and based on expert and literary judgment. The thematic layers have been integrated via their rates using weighted overlay spatial function tool of ArcGIS to provide GWP map. The distribution and extents of different potential groundwater zone are 158.05 km2 (21.59%), 35.92 km2 (4.91%), 214.77 km2 (29.34%), 220.59 km2 (30.13%), and 102.72 km2 (14.03%) for very good, good, moderate and fair zone respectively. The study's conclusions can be used to develop a groundwater action plan that will effectively protect the study area's considerable groundwater resources. With regard to the long-term availability of groundwater, this research will be very beneficial to water management.
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