村级河道水生态修复策略与技术措施研究——以闵行区浦锦街道为例

随着国家与公众对乡村生态环境的日益重视,如何对乡村河道进行有效修复成为当前的研究热点.现以闵行区浦锦街道为例,在对其水生态现状调研基础上,解析河道污染特征与污染物来源.并基于绿色生态修复的原则提出了在空间上通过生态缓冲区、河道及植物种植的方式构建河道生态系统的修复思路.进一步根据水体污染特性,制定了底质改良、紫外催化、沉水曝气、底部生物载体、生态浮岛、漂浮草垫、点源净化的内源污染防治技术措施.对比治理前后河道踏勘与水质检测结果显示:治理后河道水生态恢复较好、溶解氧浓度大幅提升、总磷得到了有效控制.后期可根据水体溶解氧浓度对曝气调控以促进对氨氮的去除效果.

Study on Strategies and Technical Measures for Water Ecological Restoration of Village-level Rivers in Pujin Street of Minhang District

With the increasing attention of the country and the public to the rural ecological environment, how to effectively restore the rural rivers has become a current research hotspot. Taking Pujin Street in Minhang District as an example, the pollution characteristics and pollutant sources of the river are analyzed on the basis of the study on its water ecological status. And based on the principle of green ecological restoration, the restoration ideas of building the river ecosystem spatially by means of ecological buffer zone, river channel and plant cultivation are proposed. Further according to the water pollution characteristics, the technical measures of substrate improvement, ultraviolet catalysis, submerged aeration, bottom biological carrier, ecological floating island, floating grass mat and point source purification for prevention and control of endogenous pollution are worked out. The comparison results of river survey and water quality detection before and after treatment show that the river water ecology restoration is better, the dissolved oxygen concentration has increased significantly and the total phosphorus has been effectively controlled after treatment. In the later stage, the aeration can be regulated according to the dissolved oxygen concentration of the water body to promote the removal effect of ammonia nitrogen.