透水性铺装在城市雨水下渗收集中的应用

针对城市透水性铺装在推广方面所面临的问题,对透水性铺装地面下渗雨水收集、雨水径流污染物去除等情况进行试验研究。结果表明:实施透水性铺装既可有效增加下渗雨水量,下渗雨水的入渗率与降雨量基本呈线性关系;还可降低天然降雨中的污染物浓度,下渗雨水中NH3-N、BOD5、CODMn等水质指标浓度明显降低,下渗雨水水质可满足景观环境补水的水质要求。试验研究为地面透水性铺装技术的推广提供参考。

Study on rain runoff infiltration and collecting efficiency by permeable pavements of urban zone

With regard to the problems related to the popularization of permeable pavements in urban zones, some aspects, such as collection and removal of contaminants from rainwater by permeable pavements in residential districts, were studied. The experimental data show that permeable pavements can effectively increase the infiltrated rain water quantity. The relationship between the infiltration rate of rain water and precipitation was basically linear, water quality indexes such as NH3-N, BOD5, CODMn in infiltrated rain water decreased, and the quality of the infiltrated rain water met standards for scenic environment use. The results from the experiments can also provide a reference for popularizing the pavement technique.