湿地生态修复在河道面源污染治理中的工程应用

受农业面源污染影响,河道水质恶化、生态系统退化,人工湿地技术是河道污染治理与生态修复的有效手段之一。通过对旭光十八涧河道进行底泥清淤、生态护坡、筑坝拦水和生态缓冲带、表面流湿地的构建,修复河道生态缓冲带56940 m^(2),构建河道表面流湿地42105 m^(2),河道水质提升至地表Ⅳ类水标准。本项目对非通航缓流河道构建农业面源污染治理技术体系,研究人工湿地对消除河道黑臭、提升水质标准、重建水生态系统的工程效应具有示范作用。

Affected by agricultural non-point source pollution,the water quality of river gradually deteriorated and the ecosystem degenerated,constructed wetland technology is one of the effective means to reduce pollution and restore ecosystem of river.By carrying out sediment dredging,ecological slope protection,water dams,ecological buffer zone and surface flow wetland on the Xuguang Shibajian River,56940 m^(2)of the ecological buffer zone was repaired,and 42105 m^(2)of surface flow wetland was constructed,the water quality of the river was improved to class IV of the National Surface Water Quality Standards.This project has a demonstration role in constructing a technical system of agricultural surface pollution management for non-navigable slow-flowing rivers,and studying the engineering effect of constructed wetlands on eliminating black odor of rivers,improving water quality standards,and reconstructing water ecosystems.