淮北平原水系连通工程对水生态环境改善效果分析

Analysis on the Improvement Effect of Water System Connection Project on Water Ecological Environment in Huaibei Plain

构建丰枯互济的水系连通工程格局,对于完善水利对经济社会发展的资源保障能力、安全保障能力,实现经济社会高质量发展意义重大。本文以安徽省淮北平原水系连通工程为例,分析了跨市县尺度的水系连通工程对水生态环境的改善效果。基于研究区长系列实测流量资料和工程调度规则进行分析计算,统计实施水系连通工程前后典型断面的生态流量保证情况,结果表明,通过淮北水系连通工程的生态流量调度,蒙城闸、固镇闸、宿县闸不满足生态流量的总天数分别由5379、4740和7024天减少至2033、1493和1463天。蒙城闸、固镇闸、宿县闸生态流量的平均保证程度由52.5%、58.1%、37.9%分别提升至82%、86.8%、87.1%。因此,水系连通工程对于生态基流保证程度的提高效果较为显著,其对于维护河湖生态健康,改善水生态环境效果显著。

It is of great significance to realize the pattern of water system connection that helps each other to im-prove the resource guarantee capacity and safety guarantee capacity of water conservancy for economic and social development. Taking the Huaibei Plain water system connection project in Anhui Province as an example, this paper analyzes the improvement effect of the cross city and county scale water system connection project on the water ecological environment. Based on the analysis of a long series of measured flow data and operation rules in the study area, the ecological flow assurance of typical sections before and after the implementation of the water system connectivity project is statistically analyzed. The results show that through the ecological flow scheduling of the Huaibei water system connectivity project, the total number of days that Mengcheng gate, Guzhen gate and Suxian gate do not meet the ecological flow is reduced from 5379, 4740 and 7024 days to 2033, 1493 and 1463 days, respectively. The average guarantee degree of ecological flow of Mengcheng gate, Guzhen gate and Suxian gate increases from 52.5%, 58.1% and 37.9% to 82%, 86.8% and 87.1%, respectively. Therefore, the water system connection project exhibits a significant effect on improving the guarantee degree of ecological base flow. It helps to maintain the ecological health of rivers and lakes and improve the water ecological environment.