Water surplus for Umm Er Radhuma aquifer-West of Iraq

الملخص AR

Water surplus (WS) is calculated for Umm Er Radhuma aquifer using different methods.

The data include monthly averages of nine stations and daily averages for Nukhaib and Salman stations which are located in the middle of western desert.

The averages of climatic elements for twenty consecutive years (from the water year of 1985-1986 to the water year of 2005-2006) were determined from the climate information recorded at these stations.

Water surplus (WS) was found to form (29.34%) of rainfall.

This reflects the portion of rainfall that recharges the aquifer.

Water deficit, on the other hand, was found to be (70.66%).

The natural recharge of groundwater in the desert was found to be (5%) of total rainfall.

The natural recharge of Umm Er Radhuma aquifer is in the order of (3.8×108 m3/year).