Abstract:
This study concerns the simulation technique approach in water resources development. An application of the technique had been conducted with the real system of the Sirindhorn Multi-purpose Reservoir at Ubolratchathani Province for the purpose of reservoir operation and water allocation study. There are conflicts among the uses of water for power production and irrigation. A simulation model were made in the form of FORTRAN computer program to represent the operation of Sirindhorn Reservoir. The model comprises of three model components, namely Rainfall Statistical Program Package, Irrigation Demand Model, and Reservoir Operations Model. They were constructed according to the operational hydrology. The Irrigation Demand Model, representing the Dom-Noi Irrigation Project, was used to estimate the irrigation demands under 16 conditions of varying parameters and characteristics of the project. The rainfall data during 1952-1978 were employed for this study. The Reservoir Operations Model, representing the physical characteristics and the operation of Sirindhorn Reservoir, was run for 22 conditions of several parameters. These parameters were irrigation demands, power production capacities, operating policies and etc. The hydrological data were employed for the period of 1955-1978. The study results reveal that simulation technique is a proper way to analyse the management problem of water resource system With this simulation study of the operation of Sirindhorn Reservoir, it is found that the reservoir has a rather limited capacity for both power production and irrigation when the project is fully developed. Hence, some further studies are needed and recommended to develop a proper guideline for operating policies and water allocation of the sirindhorn Reservoir.