Potential Release of Environmental Flow through Irrigation Reservoir
2011
Kim, S.M., Gyeongsang National University, Jinju, Republic of Korea | Kim, S.J., Gyeongsang National University, Jinju, Republic of Korea | Kim, Y.W., Gyeongsang National University, Jinju, Republic of Korea | Park, T.Y., Gyeongsang National University, Jinju, Republic of Korea | Kim, S.M., Gyeongsang National University, Jinju, Republic of Korea | Park, K.W., Rural Research Institute, KARICO, Ansan, Republic of Korea | Jang, M.W., Gyeongsang National University, Jinju, Republic of Korea
The purpose of this study was to establish the methodology for providing the environmental flows from irrigation reservoir. Reservoir water budget for study area was analyzed to simulate the water supply scenarios for environmental flows. Bonghyun and Hi reservoirs area, located in Gyeongnam, Gosung-gun, Hi-myeon, were selected for study watersheds and streams for this study. Reservoir operation was simulated to determine the envionmental flows supply amount from March to October with the constraint that environmental flow supply was restrained when the storage of reservoir were below the half or one-third of effective storage. The simulated results indicated that the supply of environmental flows with the amount of 200 ton/day and 600 ton/day resulted in up to 15 mm and 29 mm of runoff depth increase in the downstream, respectively. The effect of environmental flows supply from existing irrigation reservoir was not significant because the irrigation reservoir was not designed to supply the environmental flows. It is necessary to remodel the irrigation reservoir and develop the reservoir operation technique, to meet the need for the environmental flows.
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