长江流域水系连通性对河流健康的影响

Impact of drainage connectivity on river health in Yangtze River Basin

从健康长江3个方面的标准分析了水系连通性对长江水质、湿地生态环境、水生动物资源、防洪及水资源利用等方面的主要影响。结果表明,由于水系联通,通过水体的流动和扰动,增强了水体的复氧、自净能力,同时也使污染水体稀释的速度加快,对于改善水体水质、治理水体污染具有重要作用。维持水系连通可以明显地改善湿地生态环境,维持湿地生态环境及生物多样性,保障防洪安全和水资源可持续利用。

We analyzed the impact of drainage connectivity on the health of Yangtze River and reviewed the concepts of river health and Healthy Yangtze River. According to 3 standards of Healthy Yangtze River, we studied the main impacts of drainage connectivity on health of Yangtze River in the aspects of water quality, wetland eco- environment, aquatic resources, flood control, and water resources utilization. The results show that improving drainage connection could increase flowing of current and reinforce disturbance of water body; therefore, the capacity of reoxygenation and self - purification of water body can be enhanced and the dilution of polluted water body can be accelerated accordingly, which is beneficial for the water quality improvement and pollution control. Meanwhile, the goals of improving wetland eco - environment, maintaining biodiversity, assuring flood control security and sustainable utilization of water resources can be achieved by maintaining drainage connection as well.