Identification of Groundwater Potential Zones Using Proxy Data: Case study of Megech Watershed, Ethiopia

被引:114
作者
Berhanu, Kibrit Gedam [1 ]
Hatiye, Samuel Dagalo [2 ]
机构
[1] Univ Gondar, Inst Technol, Gondar, Ethiopia
[2] Arba Minch Univ, Water Resources Res Ctr, Arba Minch Water Technol Inst, Arba Minch, Ethiopia
关键词
AHP; GIS and remote sensing; Groundwater potential; Overlay analysis; Proxy data; REMOTE-SENSING DATA; ANALYTIC HIERARCHY PROCESS; LAND-COVER CHANGE; INFORMATION-SYSTEM; RECHARGE; GIS; IMPACT; TOPOGRAPHY; PRIORITIES; QUALITY;
D O I
10.1016/j.ejrh.2020.100676
中图分类号
TV21 [水资源调查与水利规划];
学科分类号
081501 ;
摘要
Study Region: Part of the Lake Tana sub-basin of the Blue Nile, Ethiopia Study focus: This study is aimed to identify and locate the groundwater potential zones of Megech watershed using geographic information system (GIS) and remote sensing. Lithology, lineament density, slope, geomorphology, soil, land use and land cover, rainfall, drainage density and elevation were used as proxy data to map the groundwater potential zones of the watershed. Weights were assigned for each thematic layer and thematic layer classes using the PriEsT Analytical Hierarchy Process (AHP) tool. Suitably ArcGIS overlay analysis was conducted to obtain the groundwater potential map. Geology, lineament density, slope and geomorphology were found to be the dominant and sensitive factors for groundwater zoning as portrayed in the map removal analysis. New hydrological insights for the region: Three groundwater potential zones were identified in the study area namely low, moderate and high. These groundwater potential zones were compared with an independent set of groundwater inventory data to validate the results. The validation analysis showed 78.5 % agreement between the groundwater inventory data and the qualitative results. Use of proxy data can serve as a credible source of information for groundwater potential zoning and could greatly help in the groundwater development and management of a region.
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页数:20
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