Hagos Yonas Gebresilasie, Andualem Tesfa Gebrie
Ethiopian Construction Design and Supervision Works Corporation, Ethiopia.
Department of Hydraulic and Water Resources Engineering, Debre Tabor University, Ethiopia.
Heliyon. 2021 Sep 8;7(9):e07963. doi: 10.1016/j.heliyon.2021.e07963. eCollection 2021 Sep.
Groundwater is an essential component of our country's freshwater supplies. It plays a critical role in satisfying the water demands of the nation's many user sectors. The groundwater resource cannot be exploited and sustained optimally unless prospective zones are identified prior to the drilling of wells. The current study intended to analyze groundwater potential possibilities in the Cuma sub-basin, Omo Gibe basin, southern Ethiopia, utilizing geospatial and multi-criteria decision analysis approaches. For this purpose, a range of thematic layers like geology, Rainfall, drainage density, slope, land use and land cover (LULC), Soil type, faults density, saturated hydraulic conductivity, Available water capacity, and soil depth were organized for the study area. The different sub-criteria of each theme layer were rated according to their effect on groundwater recharge, and a weightage was assigned to each thematic layer based on the analytical hierarchy method (AHP). The identification of groundwater-potential regions of the sub-basin was one of the study's main results. The resulting groundwater potential zone map is further classified into five groundwater potential classes: very good (7.01%), good (19.49%), moderate (17.48%), poor (29.51%), and very poor (26.51%). The study's findings have important significance for developing sustainable groundwater strategies in the area.
地下水是我国淡水资源的重要组成部分。它在满足国家众多用户部门的用水需求方面发挥着关键作用。除非在打井之前确定潜在区域，否则无法对地下水资源进行最佳开采和可持续利用。本研究旨在利用地理空间和多准则决策分析方法，分析埃塞俄比亚南部奥莫吉贝盆地库马子流域的地下水潜力可能性。为此，为研究区域整理了一系列专题图层，如地质、降雨量、排水密度、坡度、土地利用和土地覆盖（LULC）、土壤类型、断层密度、饱和导水率、有效持水量和土壤深度。根据每个主题图层的子标准对地下水补给的影响进行评分，并基于层次分析法（AHP）为每个专题图层赋予权重。确定子流域的地下水潜力区域是该研究的主要成果之一。生成的地下水潜力区地图进一步划分为五个地下水潜力等级：非常好（7.01%）、好（19.49%）、中等（17.48%）、差（29.51%）和非常差（26.51%）。该研究结果对制定该地区可持续的地下水战略具有重要意义。
