长江流域资源与环境 >> 2014, Vol. 23 >> Issue (11): 1620-.doi: 10.11870/cjlyzyyhj201411019

• 生态环境 • 上一篇    下一篇

城市道路典型绿带结构对总悬浮颗粒物的净化效应

CHEN Xiaoping1, XIAO Huiling1,2, ZHOU Zhixiang1, ZHANG Meng1, LIU Ziqi1, GONG Xiaoping3   

  1. (1.华中农业大学园艺林学学院/园艺植物生物学教育部重点实验室,湖北 武汉 430070;2.湖北工程学院,湖北 孝感 432000;3.武汉钢铁(集团)公司,湖北 武汉 430083
  • 出版日期:2014-11-20

THE PURIFICATION EFFICIENCY OF ROAD GREENBELTS WITH TYPICAL STRUCTURES TO TOTAL SUSPENDED PARTICULATES (TSP)

陈小平,肖慧玲,周志翔,张梦,刘子琪,龚晓萍   

  1. (1.College of Horticultural & Forestry Science / Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070,China;2. Hubei Engineering University, Xiaogan 432000,China; 3. Wuhan Iron and Steel (Group) Corporation, Wuhan 430083,China
  • Online:2014-11-20

摘要:

机动车道和非机动车道之间的隔离绿化带(简称机非隔离绿化带)对由机动车辆造成的空气总悬浮颗粒物(TSP)有较显著的净化效应。以典型结构类型的机非隔离绿化带为研究对象,通过布点采样测定空气中TSP浓度,定量地研究了道路绿化带对TSP的净化效益。同时,用郁闭度和疏透度表征了道路绿化带的配置情况,并研究其与TSP净化效率的相关性;采用灰色关联分析方法,初步探讨了TSP净化效率与温度、相对湿度、风速的相关性。结果表明:主干道机非隔离绿化带的最优结构是乔灌结构、次干道最优结构是乔灌草结构、支路3种结构类型的道路绿化带对TSP净化效率差异不明显;绿化带疏透度在10%~20%时,郁闭度在75%~90%,绿化带对TSP净化效率较高;相对湿度对TSP净化效率的影响较风速和温度大

Abstract:

Road traffic is considered as one of the most important sources of air pollution with adverse effects on human health. Greenbelts of nonmotorized roads are not only used for beautification of a city but also contribute significantly to purify total suspended particulates (TSP) in atmosphere which are derived from motor vehicles. The aim of this study is to explore which greenbelt configuration mode is more efficient to purify TSP for different grade roads and to find out which meteorological factor has more significantly effect on the purification efficiency of TSP. Some stylegreenbelts were selected as research objects in this study. Through monitoring the concentration of TSP by the way of assigning sample points along the greenbelts, we studied the quantitative purification efficiency of greenbelts which has different structures and at different grade road to TSP. Meanwhile, the correlation analysis was performed between the purification efficiency of TSP and the vegetations status of greenbelt which measured by canopy density and shelterbelt porosity. Further, we explored the correlation between the purification efficiency of TSP and the temperature, relative humidity and wind speed using the grey correlation method. The results were as follows. The configuration structure which planted with arbor and the shrub will be best for the greenbelt of the arterial road to purify TSP, and the configuration structure which configured with arbor, shrub and herbaceous plant will be most suitable for the greenbelt of the minorarterial road to purify TSP. It showed that dungarunga and large shrubs should be give priority to when we design the nonmotorized road greenbelts at serious traffic road. The purification efficiency of the greenbelt to the TSP is higher when the canopy density value and the shelterbelt porosity value of the greenbelt was between 75%-90% and 10%-20%, respectively. The canopy density will reduced and shelterbelt porosity will rise for the vegetations disrobed of their leaves in autumn and winter, but the TSP concentration of most cities is highest at winter, so more green plants should be chosen to design greenbelts. In addition, the purification efficiency will rise if choosing more plants which has better ability to absorb dust. Relative humidity played an even more important role than temperature and wind speed to the purification efficiency of TSP

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