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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。
Isolated green belts between motorized and non-motorized lanes (referred to as non-isolated green belts) have a significant decontamination effect on total aerosols (TSP) caused by motor vehicles. Taking the non-isolated green belt of typical structure as the research object, the concentration of TSP in the air was measured by spot sampling, and the purifying effect of road green belt on TSP was studied quantitatively. At the same time, the configuration of road greenbelt was characterized by canopy density and permeability, and the correlation between the greening zone and TSP purification efficiency was analyzed. The relationship between TSP purification efficiency and temperature, relative humidity and wind speed Correlation. The results showed that: the optimal structure of non-isolated green belt of main road machine was the arbor-irrigated structure, the optimal structure of the secondary trunk was the shrub-shrub structure, and the road green belt of the three types of branches had no obvious difference on the purification efficiency of TSP; The degree of canopy density is between 75% and 90% when the degree of penetration is between 10% and 20%, and the green belt is more efficient for TSP purification. The effect of relative humidity on TSP purification efficiency is faster than that for wind speed and temperature.