1. Introduction
In Turkey, the total available water volume is 112 billion cubic
meters per year. Currently, the total used water is 50 billion cubic
meters per year, and about 72% of this is used for irrigation. The
average annual precipitation is 643mmin Turkey as awhole, which
changes from region to region and from year to year. The annual
depth of precipitation is as high as 2500mm in the Eastern Black
Sea region and as low as 300mm in some parts of Central Anatolia
(Kaygusuz and Sari, 2003).
The Konya Plain, where water resources are limited, consists of
10% arable lands of Turkey. The climate of the Konya Plain is semi-