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Groundwater potential mapping using GIS, linear weighted combination techniques and geochemical processes identification, west of the Qena area, Upper Egypt
Journal of Taibah University for Science ( IF 2.8 ) Pub Date : 2020-09-22 , DOI: 10.1080/16583655.2020.1822646
Fathy Abdalla 1, 2 , Karem Moubark 2 , Mohamed Abdelkareem 2, 3
Affiliation  

The water demand in Egypt has risen due to limited surface water and varied uses. Geological and hydrological data, radar, optical remote sensing data, and Geographic Information System techniques delineate groundwater availability zones in the study area. Thematic layers (lithology, topography, slope, stream networks, lineaments, and rainfall) were integrated into the ArcGIS 10.4 using a linear weighted combination technique. The final groundwater prospective zones (GWPZ) map revealed six zones, very low, low, moderate, high, very high, and excellent, covering areas of 7.49%, 14.93%, 3.74%, 28.88%, 37.30%, and 7.62%, respectively. The GWPZ map was tested and compared to the abstraction rates, locations of existing wells, and thickness of the water-bearing formations. NDVI analysis revealed an increase in the area’s vegetation from 1984 to 2017. Geochemical analyses of 43 groundwater samples revealed water-rock interactions, ion exchange, evaporation, and the influence of irrigation-return flows as prominent processes influencing ion enrichment of the groundwater.



中文翻译:

上埃及Qena地区以西,使用GIS,线性加权组合技术和地球化学过程识别进行地下水势测绘

由于地表水有限和用途多样,埃及的需水量有所增加。地质和水文数据,雷达,光学遥感数据和地理信息系统技术勾画了研究区域的地下水可用区。使用线性加权组合技术将主题图层(岩性,地形,坡度,河流网络,线形和降雨)集成到ArcGIS 10.4中。最终的地下水勘探区(GWPZ)地图显示了六个区,分别为低,低,中,高,非常高和极好,分别占7.49%,14.93%,3.74%,28.88%,37.30%和7.62%的面积,分别。对GWPZ地图进行了测试,并将其与取水率,现有井的位置以及含水层的厚度进行了比较。NDVI分析显示,从1984年到2017年,该地区的植被有所增加。

更新日期:2020-09-22
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