Evaluation of Groundwater Potential Zone Using Remote Sensing and Geographical Information System: in Kaffa Zone, South Western Ethiopia

Temesgen Abeto Amibo, Azarias Ayeke Woldegebriel, Abreham Bekele Bayu

Abstract


Using remote sensing and ArcGIS 10.4 software analysis techniques, this study focused on delineating the groundwater potential and recharge area for the Kaffa District. For groundwater recharge zone mapping, six key influencing variables (rainfall, slope, land use/cover, lineaments, and drainage density and lithology) are selected. Thematic maps were scanned, geo-referenced, and categorized using ArcGIS 10.4 as necessary for groundwater. Weight overlay analysis and analytical hierarchy process (AHP) algorithms were used to analyze the prospective region. The outcome showed the potential for groundwater and recharge zones in four categories; very decent, good, and moderate and poor, which can be used for better groundwater resource planning and management. Therefore, the area of medium, moderate, high and very high groundwater potential occupies 1664.1 km2, 7682.9 km2, 958.27 km2, and 192.78 km2. Based on observed bore hole yield and forecast data from the respective locations, the prediction accuracy was verified. The accuracy of the prediction obtained (68.42 percent) reflects that substantially reliable and accurate results were provided by the method used for the present analysis.


Keywords


Delineation, Groundwater Potential, Overlay, Thematic maps, Weighting.

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References


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