Seyed Arman Hashemi Monfared - PhD, civil engineering faculty, Sistan and Baluchestan University, Iran
Fateme Roshandel Hormozi - MSc, civil engineering-Hydraulic, Sistan and Baluchestan University, Iran
Hamid Roshandel Hormozi - MSc, civil engineering-Hydraulic, Sistan and Baluchestan University, Iran

Water has always been known as one of the most basic human needs by the increasing of population, industrialization and urbanization. In addition, water stress occurring in recentyears in many different parts of the country due to the increased importance of proper utilization of water resources. In this paper, the optimization model of stochastic dynamic programming method is applied to determine the optimal policy for the operation of the reservoir chahnimeh.No.1 with the objective of minimizing the difference between needs and delivery. The results show that the optimization model are respectively 95.5 and 100 percent for reliability (drinking and agriculture) ,the model was able to empty the reservoir to keep a certain amount in the months of flood conditions and rivers for flood control in the area.

stochastic dynamic programming, operation of tanks, wells, Iran