灌河流域生态需水确定及保障措施分析

Analysis on Determination of Ecological Water Demand and Analysis of Safeguard Measures in the Guanhe River Basin

为了解决灌河生态水量缺乏、水体污染等生态环境问题,根据不同河段生态功能定位,采用Tennant法、MIKE21二维水质模型和水量平衡法计算灌河最小生态水量、水质需水、景观需水等,采用MIKE21水动力模型动态模拟计算四大家鱼、鳝鱼等的敏感生态需水。经综合分析确定灌河年生态需水量为15142.5万m^3,月平均生态需水流量为0.9~11.7 m^3/s,进而提出了强化农业节水、推进非常规水源利用、加强河流生态调度等生态水量保障措施。

This paper aimed to solve ecological environment problems such as lack of ecological water and water pollution in Guanhe River basin. According to the different river ecological function orientations, the Tennant method, MIKE 21 two-dimensional water quality model and water balance method were adopted to calculate the minimum ecological water requirement, water requirement of water quality and landscape water requirement, the MIKE 21 hydrodynamic model was used to dynamically calculate sensitive ecological water requirement of four famous domestic fishes and Monopterus albus. After comprehensive analysis, it is determined that the ecological water demand of Guanhe River is 151.425 million m^3, the monthly average ecological water requirement flow is 0.9-11.7 m^3/s, furthermore, it also puts forward the guarantee measures of ecological water quantity, such as strengthening agricultural water saving, promoting the use of unconventional water source, and strengthening river ecological operation.