下沉式绿地对雨水径流污染物的削减效果及影响因素分析  

Analysis on the Reduction Effect and Influence Factors of the Sunken Green Space on Stormwater Runoff Pollutant

作　　者：李畅[1] 王思思[1] FANG Xing 袁冬海[1] 李海燕[1,3] LI Chang;WANG Si-si;FANG Xing;YUAN Dong-hai;LI Hai-yan(Key Laboratory of Urban Stormwater System and Water Environment,Ministry of Education,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Department of Civil Engineering,Auburn University,Auburn 36849-5337,USA;Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control,Beijing 100044,China)

机构地区：[1]北京建筑大学城市雨水系统与水环境教育部重点实验室,北京100044 [2]美国奥本大学土木工程系,美国奥本36849-5337 [3]北京市可持续城市排水系统构建与风险控制工程技术研究中心,北京100044

出　　处：《科学技术与工程》2018年第11期215-224,共10页Science Technology and Engineering

基　　金：国家水体污染控制与治理科技重大专项(2010ZX07320-002)、漳州市自然科学基金(ZZ2016J05)和北京市优秀人才培养资助青年拔尖团队项目(2015000026833T0000)资助

摘　　要：为探究下沉式绿地对雨水径流污染物的削减效果及影响因素,采用室外种植箱的方式进行模拟试验,研究不同植物配置、不同下垫面雨水径流、不同土壤层厚度以及不同污染物浓度对下沉式绿地削减污染物的影响。结果表明,不同植物配置的下沉式绿地对削减NH+4-N的影响差值为9.6%,即依次:高羊茅(57.3%)>三种混合植物(55.0%)>鸢尾(50.4%)>鼠尾草(47.7%);对削减TP的影响差值为5.3%,即依次:高羊茅(56.4%)>三种混合植物(54.4%)>鼠尾草(53.8%)>鸢尾(51.1%);对削减COD的影响差值为8.9%,即依次:三种混合植物(39.4%)>高羊茅(37.8%)>鸢尾(33.1%)>鼠尾草(30.5%)。不同植物配置的下沉式绿地对重金属(Cu、Zn、Pb)的削减效果很好,达95%以上。下沉式绿地对三种下垫面雨水径流污染物的削减效果依次:硬质屋顶>沥青路面>绿地;不同土壤层厚度和污染物浓度对下沉式绿地削减常规污染物的影响呈正相关,对下沉式绿地削减重金属的影响不大。因此,本研究可为下沉式绿地在控制雨水径流污染问题提供一种优化途径的新思路。In order to explore the reduction effect and influence factors of the sunken green space on stormwater runoff pollutant,by the outdoor planting box simulation experiment,the impact of different plant configuration,different underlying surface stormwater runoff,different soil thickness and different pollutant concentrations of sunken green space pollutant reduction was studied.The results show that the influence on the reduction of NH+4-N of the difference is 9.6%by different plant configuration in the sunken green space,which in turn:tall fescue(57.3%)>three hybrid plants(55.0%)>iris(50.4%)>sage(47.7%);influence on the reduction of TP of the difference is 5.3%,which is in turn:tall fescue(56.4%)>three hybrid plants(54.4%)>sage(53.8%)>iris(51.1%);influence on the reduction of COD of the difference is 8.9%,which in turn:three hybrid plants(39.4%)>tall fescue(37.8%)>iris(33.1%)>sage(30.5%).The reduction of heavy metals(Cu,Zn,Pb)by different plant configuration in the sunken green space is very good,reaching more than 95%.The effect of sunken green space on reducing stormwater runoff pollutant of three underlying surfaces is in turn:hard roof>asphalt pavement>greenland;The impact of different thickness of soil layer and pollutant concentration of sunken green space reduces conventional pollutants of are positively correlated,has little effect on the reduction of heavy metals of sunken green space.Therefore,a new way to optimize the way to control stormwater runoff pollution in sunken green space can be provided.

关 键 词：下沉式绿地 植物配置 下垫面 土壤层厚度 污染物浓度 

分 类 号：X52[环境科学与工程—环境工程]