الملخص

The area of this work is bounded by Jabal Atshan to the north and wadi Qassab to the south. The study is concentrated on the structure, stratigraphy, aqifers and aquicludes of the Fat`ha Formation from a data collected by many boreholes in the area. Six of these boreholes were periodically measured for groundwater level fluctuations as well as measurements of some hydraulic properties of the upper unconfined aquifer in two boreholes. Some of the physical properties of water such as pH, Ec, BOD5 , COD were performed for the period 15/12/2001-15/5/2002. The study revealed that there were four ground water levels representing four aquifers of different depths. Various water qualities in various boreholes were recorded depending on depths and rock types forming the aquifers. In the best cases, these waters must not used for drinking, but for irrigation to certain crops and animal drinking.