道路绿化带的不同空间结构对污染物扩散的影响

Influence of Different Green Space Structure on the Diffusion of the Pollutant in the Road Green Belt

从人行道和人行道绿地2个方面研究了道路绿化带不同空间结构对汽车尾气污染物扩散的规律,结合天津市复康路道路北侧绿化带的空间结构选择3处样点,即通透型绿地、半通透型绿地和紧密型绿地,并对其样点上的粉尘浓度、噪音、CO_2浓度进行了测量。结果表明,从人行道环境质量上来看,通透型能降低粉尘和CO_2污染浓度,噪音增加量最小,紧密型反而增加了粉尘和CO_2的污染,同时噪音增大量也最大,而半通透型介于二者之间;从人行道绿地内环境质量上来看,通透型绿地内部粉尘和CO_2的富集量最小,噪音的增加量最小,紧密型绿地内部粉尘和CO_2的富集量最大,噪音的增加量最大,而半通透型介于二者之间。

The vehicle exhaust pollutant diffusion regularity was studied from two aspects of the pavement and the pavement green space. Combined within green space structure in the north side of road, three sample points were chosen, which was a green space, a half green space and a compact green space. The paper measured dust concentration, noise and the CO_2 concentration on the sample.The result showed that from the environmental quality of the pavement, the green space could reduce dust pollution and CO_2 concentration, and could increase the minimum noise, but the compact green space could increase the dust pollution and CO_2 concentration,and increase the largest noise, and a half green space was between the two. From the environment quality of pavement green space, in the green space the dust and CO_2 concentration were the smallest and minimum noise was increased, but in compact green space the dust and CO_2 concentration were the biggest, and the largest noise was increased, and a half green space was between the two.