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Geology: GROUND WATER STORAGE CHANGE OF THE DAMMAM AQUIFER / RAZAZA LAKE CENTRAL BASIN OF THE WESTERN DESERT OF IRAQ

 

GROUND WATER STORAGE CHANGE OF THE DAMMAM AQUIFER / RAZAZA LAKE CENTRAL BASIN OF THE WESTERN DESERT OF IRAQ

Aiser Abd Al-Azeez A1 Furat Company for Studies and Designs Irrigation Projects

ABSTRACT

Dammam Carbonate aquifer (Eocene) represents the ground water storage of confined aquifer along the western rim of Razaza Lake, which is the main source for irrigation.

The studied area is Al-Rahaliah basin which the aquifer is artesian flow. The ground water fluctuation during the year (1999-­2000) regime shows there is a decline in the water table about (0.4m). This I due to extended program of drilling wells, spring flow as well as the dry period for the last three years of very few rainfalls.

The exploited storage during the period of study (304 days) were estimated (27.55 x 106 m3).

These cause a negative difference between subsurface inflow and out flow of (7.79 x 106 m3) which represent a loss of aquifer storage during the study period, which allows to regional drop of (0.5m). Thus there is (0.1 m) rise in water table from the underlying ground water pressure of Umm Eradhuma (Paleocene) aquifer.


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