Hydrogeological and Efiviroiimeiital Studies on Siwa Oasis, Egypt Using GIS Technique

摘要

THIS PAPER studies the environmental conditions of the hydrological setting of Siwa Oasis using in situ measurements of water samples integrated with geographical information systems (GIS). Siwa Oasis is relying on groundwater in all their domestic use which, in return put extra pressure on water budget. The groundwater found in five reservoirs in which the Nubian sandstone aquifer is the most appropriate for drinking and domestic use. However, it is a very deep aquifer and few artesian wells are occurred. Carbonate aquifer found to be suitable for some irrigation and agricultural usage and it is more recommended to sustain the Nubian aquifer for drinking purposes. Landuse changes particularly irrigated agriculture is the key controlling factor of the groundwater deterioration.