摘要
对于以防洪为主的水库,随着运行时间推移,泥沙淤积会使防洪库容缩减,需采取合理调度运行方式以实现排沙减淤。然而,在确保排沙减淤成效的同时,如何最大程度提升水库兴利效益并兼顾库区安全,成为当前水库调度领域亟待解决的关键问题。为了研究兼顾生态流量、发电效益与库区安全的水库合理运行方式,针对嘉陵江干流某水库存在的泥沙淤积问题,建立泥沙冲淤模型,对多种运行方式下库区泥沙淤积状况进行模拟分析。研究表明:该水库采取汛期(7-9月)将水位降低至汛限水位,且在入库流量≥320 m^(3)/s或入库含沙量≥20 kg/m^(3)时进行敞泄排沙的泥沙调度方式,能够有效提升生态流量保证率和发电量,同时满足库区涉水建筑物的安全标准。
For reservoirs primarily used for flood control,sedimentation will reduce the flood control storage capacity over time,necessitating the adoption of reasonable scheduling and operation methods to achieve sediment flushing and siltation reduction.However,while ensuring the effectiveness of sediment flushing and siltation reduction,how to maximize the reservoir's beneficial utilization efficiency while also taking into account the safety of the reservoir area has become a critical issue that needs to be urgently addressed in the field of reservoir scheduling.In response to the sedimentation problem in a certain reservoir on the mainstream of the Jialing River,a sediment flushing and siltation model was established to simulate and analyze the sedimentation conditions in the reservoir area under various operation methods,with the aim of determining a reasonable operation method for the reservoir that balances ecological flow,power generation benefits,and reservoir area safety.The results indicates that adopting a sediment scheduling approach for the reservoir,which involves lowering the water level to the flood control limit level during the flood season(July-September)and conducting unrestricted sediment flushing when the inflow discharge is≥320 m^(3)/s or the inflow sediment concentration is≥20 kg/m^(3),can effectively enhance the guarantee rate of ecological flow and power generation,while also meeting the safety standards for water-related structures in the reservoir area.
作者
燕荔
贠建虹
付曼蓉
YAN Li;YUN Jianhong;FU Manrong(Shaanxi Province Institute of Water Resource and Electric Power Investigation and Design(Group)Co.,Ltd.,Xi′an,Shaanxi 710001,China)
出处
《水利与建筑工程学报》
2025年第4期233-239,共7页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金项目(52279075)
陕西省水利科技项目(2018slkj-3)。
关键词
泥沙淤积
调度运行方式
泥沙冲淤模型
兴利效益
库区安全
sedimentation
scheduling and operation methods
sediment flushing and siltation model
beneficial utilization efficiency
reservoir area safety
