Mapping of groundwater potential zones using remote sensing and geographic information system: A case study of parts of Tigray, Ethiopia

Gebre, Tesfa; Ahmad, Imran; Dar, Mithas Ahmad; Gadissa, Ebissa; Halefom, Afera; Tolosa, Asirat Teshome; Brhane, Ermias Sisay

doi:10.1306/eg.06181818001

Cited by 8 publications

(1 citation statement)

References 12 publications

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“…Many studies, such as [5], [14,22], proved that the integration of RS and GIS techniques with the Analytical Hierarchal Process (AHP) method is the best way to provide a rapid delineation of the suitable GWPZs sites. The AHP approach for the multi-criteria decision-making process (MCDM) developed by Saaty in 1980 has been intensively employed and effectively performed in different fields of natural resources management [23][24][25][26]. To assign different normalized weights according to the AHP procedure, various influencing factors are ranked based on the relative importance and priorities that can be categorized in the form of a pair-wise comparison matrix of the scale values [27,28].…”

Section: Introductionmentioning

confidence: 99%

Geoinformatics-Based Approach for Aquifer Recharge Zone Identification in the Western Desert of Iraq

Mohammed

2023

GEOMATE

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Vast parts of the globe are facing a water scarcity problem owing to the increasing water demand of the growing population and urban expansion, and intensive agriculture and industrial activities. Arid and semiarid areas already suffer from a severe shortage of surface water supplies due to climatic conditions such as a temperature rise, evaporation rates, and diminution of rainfall amounts with discontinued intervals. Delineation of suitable sites for the groundwater potential recharging zones is one of the available solutions to recompense surface water shortages in the Al-Mohammedi basin in the Iraqi Western Desert. Recently, the utilization of modern geospatial techniques such as remote sensing (RS) data and geographic information system (GIS) in combination with multi-criteria decision-making (MCDM) approaches has proven an efficient tool for groundwater demarcation. In this study, RS data, such as Landsat 8 images and SRTM Digital Elevation Model (DEM), published geological maps, and metrological data were used to generate eight thematic layers of criteria-geomorphology, geology, lineament, rainfall, soil infiltration, slope, land use and land cover, and drainage density. All thematic maps were generated and transformed into the raster format depending on the raster conversion tool in ArcGIS 10.8 software. The output map of groundwater potential zones (GWPZs) was generated by integrating all the thematic layers according to the weightage values generated depending on the Analytical Hierarchal Process (AHP) approach. Finally, the prospective zones were examined and validated with present yield wells data. Twenty-two out of twenty-eight validation boreholes (76.87%) matched the predicted classes of the yield boreholes, and the cross-correlation value certified this result as R 2 = 0.67.

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