Reliabilities in the operation of parallel and series reservoir systems | |
| Author | Vilas Nitivattananon |
| Call Number | AIT Thesis no. WA-91-23 |
| Subject(s) | Water resources development--Data processing Reservoirs |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The uncertain nature of hydrological processes, such as rainfall and evaporation together with the sensitivity of changes in future water demands are always elements in the planning process of a water resources development. Furthermore, the planning and design of a complex system with multireservoirs can be considered to have alternative configurations of reservoir system. Appropriate performance indices, such as reliability should be used in the decision process as aids for the evaluation and selection of alternative design and operation for a variety of water resources project. This study is carried out to evaluate and compare the performance in operation of the two common reservoir configurations, i.e. parallel and series reservoir systems. A stochastic simulation model is developed by considering the uncertainty and cross correlation of inflows to the reservoirs, sensitivity of changes in future target water demands and reservoir capacities. The model is applied to the water resources development in the Rayong river basin which is a part of the Eastern Seaboard Water Resources Development Project in eastern Thailand with high increasing municipal& industrial water demand in the Map Ta Phut industrial estate together with the irrigation water requirements in the Ban Khai existing and extension areas and water conveyance to the outside basin Nong Kho reservoir for the water demand of the Laem Chabang-Pattaya area. The parallel system is the three real reservoirs, i.e. the existing Dok Krai, the underconstruction Nong Pia Lai and the planned Khlong Yai reservoirs in the basin, and the series system is assumed by putting the same reservoirs into series with the same data input to the system as the real one. The results of performance in operation of the reservoirs for the year 2001 are determined. The study shows that the performance in operation of series reservoirs is better than that of parallel reservoirs, i.e. more months Of successful operation, less severity and less failure time. In addition, the sensitivity analysis of the system parameters confirms that comparison of performance results in operation of the two systems. The results also show that the performance in operation of the real reservoirs in the Rayong river basin for the year 2001 is not very conservative, even when the planned Khlong Yai reservoir is included in the study. The difference in performance for each demand group such as the municipal& industrial and irrigation water demands is dependent upon the objective or priorities of water release and discharge from the reservoirs. And the sensitivity analysis of performance results respond quite well to the parameters of change in water demands and inflows, but not to the parameter of increase in reservoir capacities. |
| Year | 1991 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Harboe, Ricardo |
| Examination Committee(s) | Suphat Vongvisessomjai ;Nophadol In-na |
| Scholarship Donor(s) | Government of Australia |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1991 |