SYSTEM DYNAMIC MODELING OF MULTIPURPOSE RESERVOIR OPERATION TO ESTIMATE THE OPTIMAL HEIGHT OF THE DAM

Water resources developments and the future planning need the management tools which would be capable to simulate the complicated systems in order to support decisions making. The main objective of this method of simulation is its simplicity and rapid learning of system behavior in present and future. System dynamics is a feedback –based object- oriented simulation approach which represents complex dynamic systems in a realistic way and also allows the involvement of users in model development. By this way, the confidence in modeling process increases. In this study, a dynamic model of Damghan dam (located in Semnan province) has been developed. The aim of this study is to determine the effect of different operation policies on the behavior of reservoir in supplying downstream demands until 2030. For this purpose, eight scenarios proposed. Among them, three scenarios give the best results in supplying the downstream demands. It is revealed that the application of suitable policies can provide the present demands and also the future developments. In this study, the dam height is optimized considering the suitable supply for downstream demands.