苏州市新建城区地表径流污染分析

Analysis of Surface Runoff Pollution in Newly Built Urban Area of Suzhou City

地表径流污染是目前影响城市水环境质量的重要因素。以苏州市新建城区为研究对象,选取不同功能用地的不同下垫面开展径流水质调查,结合系统出流水质的监测,计算分析了各用地类型总污染负荷及其构成。结果表明,对于新建城区,下垫面径流冲刷污染负荷(以COD为例)在居住区、商业区、公建区总污染负荷中的占比分别达到39%、82%、40%,是城市面源污染控制的工作重点。

Surface runoff pollution is an important factor affecting the quality of urban water environment.Taking a newly built urban area of Suzhou as the research object,different underlying surfaces were selected to carry out a survey of runoff water quality.Combined with the monitoring of outflow water quality of the system,total pollution load of each land type and its composition was calculated and analyzed.The results indicated that for new urban areas,underlying surface runoff pollution load(taking COD as example)accounted for 39%,82%and 40%of total pollution load in residential,commercial,and public areas respectively.It can be one priority of urban non-point source pollution control.