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In arid regions where average annual rainfall is less than 200 mm, recharge to local and regional aquifers is mostly indirect, very limited and insignificant (Lloyd 1999). Apart from the limited groundwater in shallow alluvial aquifers, most of the stored groundwater in local and regional sedimentary aquifers is non-renewable fossil water with varying ages between about 10,000–32,000 years.. The extensive use of groundwater, including the nonrenewable part, has been heavily practiced in several countries such as USA, Australia, Spain, India, Jordan, Oman, Libya, Bahrain, UAE, Egypt and Saudi Arabia, to support, agricultural and domestic activities. Saudi Arabia’s intensive use of groundwater, including non-renewable fossil water, especially after the increase in its oil revenues in 1974, is an example for intensive utilization of groundwater for irrigated agriculture to support socioeconomic developments of natural communities.

A Study of Subsurface Drainage and Water Quality in Jeddah-Makkah Aquifer Zone, West Central Arabian Shield, Saudi Arabia