*3.1.5.1 Groundwater recharge*

Groundwater aquifers in the study area are recharged by many sources of water, as follows:


pathways of magmatic systems [20]. A major crack extends from the east to the west of the study area. There are also local cracks stretching group north-west to

According to [19], the geology of the study area consists of Cretaceous Tawilah Sandstone (Kt), Lower Basalt (Tb1), Low Volcanic Acids (Tr1), Basic Volcanic Medium (Tb2), Second Volcanic Acids (Tr2), Granite (Tgr): *granite in the mountain of Sabir contains some older volcanic rocks* and finally Quaternary (QW): Wadi sediments are deposited by seasonal floods and wind-deposited soils derived from the alteration of volcanic ash and tufa mainly of (Tr1). Thickness can be up to 70 m. **Figures 9** and **10** illustrate geological cross-sections of some

According to [19], groundwater in the study area is being produced from three aquifers: the Quaternary alluvium, the Tertiary fractured volcanic and the Cretaceous Tawilah Sandstone. Cretaceous Tawilah Sandstone in the study area is located in the lower classes, in the southwest of the study area and extends to the north, as

south-east perpendicular to the main fault (**Figure 8**).

*The geology cross-section of Jabal Sabir to Al-Hawban (the source of basic map [19]).*

*The geology cross-section of Jabal Habashi to Hedran (the source of basic map [19]).*

study areas.

**Figure 10.**

**Figure 9.**

*Resources of Water*

shown in **Figure 11**.

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*3.1.5 Hydrogeology of the study area*
