摘要
为合理配置永定河平原南段(宛平湖末端—金门闸市界)水资源量并服务于生态治理与修复工程规划设计,以2019、2020年永定河生态补水数据为研究基础,提出了进行河道渗漏量估算的新方法“入渗速率面积法”。通过分析平原南段渗透性特征并对河道入渗速率获取方法进行对比与验证,将该法成功应用于2020年秋季补水调度中,并提出了天然河道河水入渗速率经验值。结果表明:平原南段京良路以上段渗透性较强,但该段砂石坑受前2次补水河床表层淤积影响,现状河道入渗速率较2019年补水前明显减小,随着常态化补水仍将有一定程度的减小;天然河道河水入渗速率试验是评价河道渗漏量的可靠手段;平原南段在现状河道条件下的最小生态流量约9~10 m^(3)/s。研究为永定河水资源配置以及生态治理与修复工程的规划设计提供了关键依据。
In order to rationally allocate the water resources in the south part of Yongding River Plain(from the end of Wanping Lake to the city boundary at Jinmen Sluice), and to serve the design of ecological management and restoration projects, the infiltration rate area method is proposed to estimate the river leakage. All researchs are based on the ecological replenishment data of the Yongding River in 2019 and2020. This paper analyzes the permeability characteristics of the southern section of the plain, and compares and verifies the methods for obtaining the infiltration rate of the channel. The method is successfully applied to the water replenishment scheduling in autumn 2020, and the empirical values of natural river channel are proposed. The results show that the permeability of the upper section of Jingliang Road in the south part of the plain section is strong, but the sand pits in this section are affected by the deposition on the surface of the riverbed during the previous two water supplyment. The current river infiltration rate is significantly reduced compared with that before water replenishment in 2019. With the normalization of water replenishment, there will still be a certain degree of reduction. Infiltration rate of natural river is a reliable means to evaluate the river leakage. The south part of the plain section maintained the minimum ecological water demand of about 9 ~ 10 m~3/s under the current river conditions.
作者
魏红
刘培斌
姚旭初
汪琪
王彪
蒋少熠
高云柱
WEI Hong;LIU Peibin;YAO Xuchu;WANG Qi;WANG Biao;JIANG Shaoyi;GAO Yunzhu(Beijing Water Resources Planning and Research Institute,Beijing 100048,China;Beijing Institute of Water,Beijing 100048,China;Beijing Miyun Reservoir Management Office,Beijing 101512,China)
出处
《北京水务》
2022年第S01期43-48,共6页
Beijing Water
基金
北京市自然科学基金资助项目(Z160001):“永定河流域生态修复的研究”
北京市科技计划项目(Z16100004516105):“北京市水资源调蓄与水污染控制关键技术研究与示范”。
关键词
永定河
生态补水
渗透性
入渗速率面积法
Yongding River
ecological water supplement
permeability
infiltration rate area method
