Because this region can be very dry and without rain for long periods,two large reservoirs have been constructed to support water supply to the crops,when natural supply,is in short supply.Today,the water level was the highest I have ever seen.

see http://www.pbase.com/taggart51/image/157568843 :Looking at this previous shot,taken last September,will give a good idea of how much rain has fallen over the winter months.