2022年永定河生态补水地表水文分析

Hydrological analysis of ecological water replenishment and surface water of Yongding River in 2022

以永定河流域为研究区,基于生态补水期间地表水监测数据,科学分析了补水过程中水量、水头等水文要素变化特征,并结合地质条件、河道特征以及水位等因素,总结归纳水文要素变化原因。受永定河沿线砂石坑、水面蒸发和地表水入渗等影响,各断面水头行进时长越向下游越长;相比于2020年补水收水率明显变大,尤其是平原段收水效果明显。通过对此次试验性补水的分析,为今后进一步开展科学生态补水工作奠定基础。

In recent years,the ecological restoration of capital rivers has been adhering to the"open the way with water and lead the way",and carried out practice in Yongding River,Chaobai River and other basins.This study takes the Yongding River as the research area.Based on the surface water monitoring data during ecological water replenishment,the change characteristics of hydrological factors such as water quantity and head in the process of water replenishment are scientifically analyzed.In addition,the change causes of hydrological factors are summarized and summarized combined with geological conditions,river characteristics,and water level.The following main conclusions are drawn:under the influence of sand pit,water surface evaporation and surface water infiltration along the Yongding River,the water head of each section is longer and longer downstream;the water supply rate is significantly larger than that in 2020.Especially in the plain section of the water harvest the effect is obvious.Through the monitoring and analysis of the experimental water replenishment,it lays a foundation for further scientific ecological water replenishment work in the future.