摘要
为了更加科学地制定北方断流河道的生态补水方案,选取常年断流河道永定河北京段为研究区,基于构建的河道水力学模型,模拟分析研究区2019年和2020年两次生态补水过程,量化了生态补水过程中蒸发和渗漏损失量约占20%。官厅水库补水流量越大,下游各断面峰值流量的削减率越小,为减小流量损失,提高补水流量利用率,在水源相对充足的条件下,建议补水流量介于40~80 m^(3)/s之间,同时采取小流量和大流量交替补水的方法,将流域生态补水效益实现最优化。
In order to formulate the ecological water replenishment plan of northern cut-off river more scientifically,this paper takes the Beijing section of the Yongding River as the research area.Based on the established channel hydraulics model,it simulates and analyzes the ecological water replenishment process of the study area in 2019 and 2020,and quantifies the amount of evaporation and leakage loss during the ecological replenishment process accounting for about 20%.The larger the replenishment flow of Guanting Reservoir,the lower the reduction rate of the peak flow of each downstream section.In order to reduce the flow loss and improve the utilization rate of the replenishment flow,it is suggested that the replenishment flow should be between 40~80 m3/s under the condition of relatively abundant water source,and the method of alternating small flow and large flow replenishment should be adopted at the same time.Under the condition of limited water source,the alternations of high-flow and low-flow water replenishment can be considered proper to realize the optimization of ecological water replenishment benefit in the basin.
作者
孙冉
潘兴瑶
王俊文
任宇
杜鹏
马尧
邢渊
SUN Ran;PAN Xing-yao;WANG Jun-wen;REN Yu;DU Peng;MA Yao;XING Yuan(Beijing Water Sciences and Technology Institute,Beijing 100048,China;Beijing Engineering Research Center for Non-Conventional Water Resources Utilization and Water Saving,Beijing 100048,China;Beijing Water Resources Dispatch Center,Beijing 100038,China;Beijing Jing-mi Water Diversion Management Office,Beijing 101400,China)
出处
《中国农村水利水电》
北大核心
2021年第6期19-24,共6页
China Rural Water and Hydropower
基金
国家水专项课题项目(2018ZX07109-004)
国家自然科学基金项目(41730749)。
关键词
河道断流
生态补水
水力学模型
效益评估
永定河
channel cut-off
ecological replenishment
hydraulics model
benefit assessment
Yongding River
