圩区水环境生态修复案例:苏州市紫薇文化园

Case of Water Environment Ecological Restoration in Polder Area:Ziwei Cultural Park in Suzhou

针对城镇小流域水系水质恶化、水生态系统受损的问题,以苏州市渭塘镇紫薇文化园水体生态环境修复为例,采用控源截污、内源治理、水生植物修复、原位水质净化和生境调整等技术措施,对园区内水系(朱家巷河、北雪泾河、庙前河)进行综合治理。工程措施实施后,朱家巷河水质从《地表水环境质量标准》(GB 3838—2002)劣Ⅴ类提升至Ⅲ类水标准;北雪泾河、庙前河水质从地表水劣Ⅴ类提升至Ⅳ类水标准;水体生态系统得到恢复,水生生物多样性增加。

In view of water quality deterioration and aquatic ecosystem damage in small urban watersheds,taking the ecological restoration of water body in Ziwei cultural park,Weitang Town,Suzhou as a case,the technologies and measurements,such as pollution source control and interception,internal pollution source treatment,aquatic plant restoration,in-situ water quality purification and habitat adjustment,are adopted to comprehensively manage the water systems of Zhujiaxiang River,Beixuejing River,and Miaoqian River in the park.After the implementation of engineering measures,the water quality of Zhujiaxiang River was improved from inferior levelⅤto levelⅢin the Environmental Quality Standards for Surface Water(GB 3838-2002).The water quality of Beixuejing River and Miaoqian River were also improved from levelⅤto levelⅣ.The aquatic ecosystem has been restored and the diversity of aquatic organisms has increased.