荆门市竹皮河流域水环境综合治理之生态修复工程设计

竹皮河为季节性雨源型城市河流,存在污水直排、底泥淤积、季节性干涸等诸多水环境问题,导致其水质恶化严重,水生态系统受损,自净能力较弱。为恢复竹皮河生态系统多样性,提升水体自净能力,实现水质长效保持,在控源截污的基础上,采用人工湿地、原位微生物修复、生态砾石河床、水生植物恢复等多种生态治理技术集成,实施河道生态补水、生态净化、生态修复三大工程,重建生态系统多样性,实现水质自然净化。通过流域综合治理,竹皮河城区段下游水体水质逐步达到地表Ⅳ类水标准。工程设计为雨源型城市河流的生态治理提供了参考。

Ecological Restoration Project Design of Comprehensive Treatment of Water Environment in Zhupi River Basin,Jingmen City

Zhupi River was a seasonal rain-source urban river,which had many water environmental problems,such as direct discharge of sewage,sedimentation of sediment and seasonal drying up.These problems resulted in serious deterioration of water quality,damaged to water ecosystem and weak self-purification ability.In order to restore the diversity of Zhupi River ecosystem,improve the self-purification ability of water body,and achieve long-term water quality maintenance,various ecological treatment technologies were integrated,such as constructed wetland,in-situ microbial restoration,ecological gravel bed,aquatic plant recovery on the basis of controlling source and intercepting pollution.Three major projects for river ecological water supply,ecological purification and ecological restoration in river channels were carried out,to restore the diversity of ecosystems to achieve natural purification of water quality.Through comprehensive treatment of the watershed,the lower reaches of Zhupi River section reached the standard ofⅣclass of surface water.The engineering design provides a reference for the ecological control of urban rivers of rain-derived cities.