陈前 张永祥 杨春和等
摘要为改善区域水体环境,南通市通州区对该地区河道进行生态修复,采用污水口预处理、底质处理、生态浮岛及直接补给部分生物物种以增加生物多样性等生态手段,并辅以调水、生态清淤、岸坡修复等工程措施。经过4个月的整治,河道恢复生态功能,水体水质明显好转。
关键词河道;生态修复;生态手段;工程措施
中图分类号S181文献标识码
A文章编号0517-6611(2015)31-254-03
Practice Case of River Ecological Restoration in Tongzhou, Nantong
CHEN Qian1, ZHANG Yongxiang2, YANG Chunhe1 et al
(1. Nantong Science and Technology College, Nantong, Jiangsu 226007; 2. Daheng Environmental Engineering Co, Ltd., Nantong, Jiangsu 226007)
Abstract To improve quality of the water environment in the area, ecological restoration of river in Tongzhou District of Nantong City was implemented to increase biodiversity by pretreatment in sinkhole, disposal of substrate, ecological floating island, adding some biological species to river and so on. Engineering measure was used by water diversion, ecological dredging and restoration of slope, after four months, ecological function of river was restored, water quality was improved quickly.
Key words River course; Ecological restoration; Ecological method; Engineering measures
南通滨江临海,水网纵横,原本是我国东南沿海地区水资源最丰富的地区之一。但相悖于近年来工业化及城市化进程的快速推进,配套污染治理设施的不完善导致部分地表河道污染严重,多条河流水体均出现不同程度的功能退化,实际上已成了水质型缺水型城市之一[1]。顺应社会经济发展需求,为了有效治理日趋恶化的水环境,南通市通州区政府针对区域内河道退化问题,制定为期3年的河道整治方案,对北山湾、中心横河、一号横河、中心竖河4条河道同期开展实施生态修复的工程项目。该生态整治为区域水体环境生态修复的工程项目提供参考。
1水系背景
1.1水质现状
上述4条河流位于通州金沙镇城区,除北山湾为运盐河支流外,其余3个河道均属于城区三级河道。以水为脉,沿线居民密集。原本城水相融,人水相亲,但由于长期疏于管理,4条河道均出现功能退化现象:河道积累大量淤泥,水流缓慢,河道窄小,水质浑浊,河岸有成片出现漂浮物等脏乱现象。尤其夏季水华泛滥,过往群众无不摇头侧目。……