| Title |
Water Yield Evaluation of a Reservoir System Based on a Deficit Supply in the Han River Basin |
| Authors |
최영제(Choi, Youngje) ; 이은경(Lee, Eunkyung) ; 지정원(Ji, Jungwon) ; 이재응(Yi, Jaeeung) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.5.0477 |
| Keywords |
부족분 공급방식;저수지 시스템;저수지 모의운영;용수부족 Deficit supply;Reservoir system;Reservoir simulation;Water scarcity |
| Abstract |
Reservoir operation affects the sustainability of a water supply. However, the increase in the temporal and spatial variability of rainfall, attributed to climate change, has led to severe droughts and increased difficulty in maintaining a sustainable discharge at certain locations in a reservoir system operation. In this study, water yield was evaluated using reservoir simulation with varied water supply. Three reservoir system models were simulated for nine reservoirs in the Han River basin. The time-based reliability, volumetric reliability, and resiliency were used to evaluate the results. Each case was simulated by applying firm supply, deficit supply, and deficit supply with historical power release of the Hwacheon Reservoir. As a result of the simulation, all indexes were increased when the deficit supply was applied. In particular, the time-based reliability increased by more than 30%, and the supply reliability increased by about 4%. The result showed that the water supply of the entire water system could be increased when all reservoirs in the water system were operated to supply water and maintain sustainable discharge at the same downstream point. The deficit supply was an efficient reservoir operation method for responding to climate change, especially increased rainfall variability. |