不同功能区绿地径流污染分析
2020-09-10吴星怡
吴星怡



摘要:为准确表征不同城市绿地中的径流和雨水污染特征,采取针对性措施对雨水径流污染进行处治,对土壤进行改良,本文在调研扬州市邗江区的绿地分布情况之后,选取5种不同功能区绿地,采集其径流雨水样品,对收集的水样中的污染物组成和浓度进行比较分析,以了解径流雨的时空分布特征,为有效处治城市绿地的径流污染提供技术指导。
Abstract: In order to accurately assess the characteristics of runoff and rainwater pollution and soil characteristics of green spaces in different cities, it take targeted measures to treat the runoff pollution of rainwater and improve the soil. In this paper, after investigating the distribution of green space in Hanjiang District of Yangzhou City, five types of green space in different functional areas were selected, and their runoff rainwater samples were collected, and the composition and concentration of the pollutants collected in the water samples were compared and analyzed to understand the time distribution and space of runoff rainwater. The distribution characteristics provide a basis for the efficient treatment of runoff pollution in urban green space.
關键词:城市绿地;径流污染;时间分布;空间分布
Key words: urban green;runoff pollution;time distribution;spatial distribution
中图分类号:X522 文献标识码:A 文章编号:1006-4311(2020)25-0249-03
0 引言
快速的城镇化建设加剧了城市内涝、水资源匮乏以及雨水径流污染等各项问题,雨水径流污染已成为城市水污染的三大来源之一。目前国内城市绿地的雨水入渗率普遍呈现较低的状态,并且对绿地的规划多停留在景观效果和休闲层面上,尚未与城市水体间建立有效联系,对城市绿地在水循环与污染控制方面的重视不足,导致绿地系统渗蓄径流雨水的效果不理想,绿地系统的维护费用较高等现象。因此,如何结合“海绵城市”的理念,对照现阶段城市绿地建设中存在的问题,根据城市地形地势、城市管网系统以及雨洪管理设施将城市绿地系统进行优化设计,对城市绿地系统在水循环以及污染控制两大方面开展系统专题研究,是现阶段亟需解决的问题。
国内外研究人员对各个地区城市绿地中径流污染的组成,浓度和特征进行了许多研究,研究结果均表明城市绿地雨水污染的严重性,为城市绿地雨水污染的控制提供了一定的研究基础[3-6]。……
