GIS and Remote Sensing Application for Groundwater Potential Zone Delineation: the Case of Nili River Catchment of Tekeze River Basin Amhara Region Ethiopia.

No Thumbnail Available



Journal Title

Journal ISSN

Volume Title


Addis Ababa University


Groundwater is treasured and very important natural resource globally. It is also the most essential for the development of a country. However, groundwater potential zone mapping still remained uncertain due to the challenge nature of groundwater and also less studied. Therefore, this research aimed at delineating the groundwater potential zone of Nili river catchment by using the integration of Geographic Information System (GIS) techniques Hence, in this estimation seven controlling factors are used as thematic layer which, were derived from 30m*30m resolution Digital Elevation Model (DEM) data, and exiting map of geology, geomorphology, slope, drainage density and land use/land cover, rainfall, and soil texture. The groundwater potential evaluation of Nili river catchment utilized the above factors as an input data using weighted overlay analysis and Analytical Hierarchy Processes (AHP) methods. In this analysis each thematic layers were weighted, calculated and compared with different literature values of similar researches at different localities. After weighted average calculation of each thematic layer, relative importance was assigned values according to AHP scale.The analysis showed that groundwater potential of the study area ranges from moderate (31.66%) to very poor (16.13%) with intermediate potentials rated as good (27.59%) and poor (24.62%). The analyses revealed that most important influencing factors of the groundwater potential zones of the study area (Nili river catchment) are geology, geomorphology, land use land cover and slope as compared to the other controlling parameters such as rainfall, drainage density and soil texture. The model result also indicated that good groundwater potential is associated with low slope, flood plains, crop lands, low drainage densities and high rainfall areas. In converse, poor groundwater potentials are associated with steep slopes mainly to mountains areas, bare lands, high drainage densities and low rainfall areas. Therefore, this research shows vigorous technique using GIS is economically affordable, technically competent and valuable for delineating groundwater potential zones. It is also recommended that the Nili river catchment needs geophysical investigations and further wells drilled in the catchment to get supplementary subsurface formation.



Groundwater potential, GIS, Remote Sensing ,Blesa, Nili River, AHP