الفهرس 
Location and problem formulationOnly 14 pages are availabe for public view
 |  | from | 213 |  |  |
| | | from | 213 | | |
Abstract
Bahariya Oasis was selected because it is regarded as one of the most attractive areas for investment in the Western Desert. Although it has a hyper-arid environment, it is characterized by an extensive non-renewable Nubian Sandstone Aquifer System (NSAS), which is considered the key source for agricultural and national development projects. With an increasing population and agricultural activity, the evaluation of water supply has become an issue. The current study aims to evaluate the quality of groundwater in the Nubian Sandstone Aquifer and document the relationship between the different geological and structural settings of Bahariya Oasis and the geochemistry of groundwater adided by remote sensing and GIS techniques. SRTM DEM proved advantageous over the topography of the area, as well as, distribution maps of different ions. To achieve the aim of the study, 52 samples from the shallow and deep aquifers were collected and analyzed to list 13 physico-chemical parameters. Groundwater in some locations is suffering from an increased limit of salinity from the south to the north of the studied area through the flow path of groundwater, where the NE- anticline fold, the ENE Bahariya mid dextral strike slip fault, and the NE-striking normal fault orient the direction of flow toward the north. Concentrations of Fe+2 and Mn+2 in the oasis exceed the standard limit, posing a significant problem in all different proposals. The leaching process from bearing minerals is the main source for that increase. Graphical representation, geochemical modeling, and statistical analysis referring to the Na-Cl and Mg-Ca-Cl water types and the processes responsible for all changes are the dissolution of the host aquifer rocks and cation exchange in clay minerals.