植草沟在城市面源污染控制系统的应用

Application of grassed swales in urban non-point source pollution control

暴雨径流造成的城市面源污染已引起广泛重视,为控制和削减进入受纳水体的径流污染负荷,各种技术措施得到发展,植草沟便是其中之一。植草沟是景观型地表沟渠排水系统,从植草沟定义、类型、设计计算、参数确定、运行维护及应用实例方面作了较详细介绍。植草沟在条件合适时可代替传统的雨水管道,具有很好的推广应用前景。

Urban non-point source pollution control from stormwater runoff has been given significant attentions. Practices were developed and implemented to control and attenuate runoff pollution loads into receiving waters. Grassed swales are one of a number of landscape-and grading-related BMPs that primarily use bilfiltration and limited infiltration to remove pollutants. Its particular introduction on concept, design method, design criteria, maintenance and design examples was given. When properly incorporated into an overall site design, grassed swales can be applied as substitute of conventional pipe work.