The current work aims to produce a digital database and thematic maps for assessing the groundwater potential zones in the Dahab Valley Basin using RS and GIS techniques in combination with the AHP model. In this study, the geographic distribution of the groundwater potential zone was mapped using nine criteria, including SL, Ge, TWI, LD, LU, DD, So, Rf, and CV. Also, the possible groundwater zones map was verified using the ROC and the locations of 28 wells. The results indicate that there are five groundwater potential zones in the study area: very low (212.43 km2 i.e., 10.34%); low (450.73 km2 i.e., 21.94%); moderate (561.60 km2 i.e., 27.33%); high (459.13 km2 i.e., 22.35%) and very high (370.63 km2 i.e., 18.04%). Moreover, the western areas were primarily represented by high and very high zones. Finally, the results of the spatial modeling showed that the AHP-based groundwater potential zone map had an acceptable correlation with the locations of the wells (AUC = 65.7%, n = 28), proving the accuracy of the AHP-GIS rating system.

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Delineating Groundwater Potential Zones in the Dahab Valley Basin, Dahab Area, Southeast Sinai, Egypt, Using Remote Sensing and GIS Techniques and Analytic Hierarchy Process (AHP)

  • Ali Hagras

摘要

The current work aims to produce a digital database and thematic maps for assessing the groundwater potential zones in the Dahab Valley Basin using RS and GIS techniques in combination with the AHP model. In this study, the geographic distribution of the groundwater potential zone was mapped using nine criteria, including SL, Ge, TWI, LD, LU, DD, So, Rf, and CV. Also, the possible groundwater zones map was verified using the ROC and the locations of 28 wells. The results indicate that there are five groundwater potential zones in the study area: very low (212.43 km2 i.e., 10.34%); low (450.73 km2 i.e., 21.94%); moderate (561.60 km2 i.e., 27.33%); high (459.13 km2 i.e., 22.35%) and very high (370.63 km2 i.e., 18.04%). Moreover, the western areas were primarily represented by high and very high zones. Finally, the results of the spatial modeling showed that the AHP-based groundwater potential zone map had an acceptable correlation with the locations of the wells (AUC = 65.7%, n = 28), proving the accuracy of the AHP-GIS rating system.