基于MIKE Basin的袁河流域枯水期水库群联合供水调度研究OA

[Objective]In 2022,the Poyang Lake Basin experienced a rare drought event with consecutive summer and autumn aridity and extremely low water levels during the flood season,leading to sustained declines in river and reservoir water levels.Implementing coordinated water supply scheduling for the reservoir groups in the basin can alleviate the prominent imbalance between water supply and demand.[Methods]Taking the Yuanhe River Basin(a tributary of the Ganjiang River)as an example,10 key water supply projects and 30 critical water supply targets were selected.A coordinated water supply scheduling model for reservoirs in the basin was established using the MIKE Basin model.Coordinated water supply regulation measures for reservoirs were proposed,and the water supply scheduling effects in the basin were analyzed.[Results]In typical years such as 2001,2007,and 2022,six water consumers in the Yuanhe River Basin,including the Shankouyan irrigation area,Yuanhe Water Plant,Feijiantan irrigation area,Yuannan irrigation area,Yuanhuiqu irrigation area,and Menghe irrigation area,experienced water shortages with water shortage rates ranging from 0.2％to 28.9％.After implementing three regulation measures,including adjusting the limit water levels of water supply for Shankouyan,Feijiantan,and Jiangkou reservoirs,adjusting the water supply targets for Shankouyan reservoir,and adding new reservoir projects,the water shortage levels of the main water consumers significantly improved,achieving an average 7.2％reduction in water shortage.Under three inflow frequencies of 90％,95％,and 99％,the water shortage rates for Shankouyan irrigation area,Feijiantan irrigation area,and Yuanhuiqu irrigation area decreased by an average of 7.41％,3.46％,and 2.28％,respectively.[Conclusion]Based on the actual water shortage conditions,reasonable reservoir regulation measures are proposed,which effectively improves the water shortage levels of major water consumers,such as irrigation areas in the dry season.These measures can provide technical support for the response to extreme drought events in river basins.