不同绿地类型的滞尘效应比较

Comparison of Dust Catching Capacity of Different Greenbelt Types

以地处山西省晋中盆地的山西农业大学校园为试验区,研究了不同绿地类型的滞尘效应。结果表明:绿地具有减尘作用,绿地中总悬浮颗粒物(TSP)值显著低于非绿地。距扬尘源10 m处不同类型绿地的减尘率依次为:乔灌草复合型38%,灌草型31%,草坪7%,裸地2.6%。不同绿地类型内TSP值均有明显变化,但TSP值的变化梯度有差异。在3种绿地类型中,乔灌草型绿地变化梯度最大,灌草型绿地次之,草坪最小。说明乔灌草型绿地的减尘效应最大。

Effect of dust catching capacity of different types of greenbelt was studied in Shanxi Agricultural University in Jinzhong Basin, Sbanxi Province. It showed that： Greenbelt played a role in reducing dust, TSP value of grecnbelts were apparently lower than it of bare space. In different types of greenbelt, reducing dust ratio of arbor - shrub - lawn, shrub - lawn, lawn and bare space,10 m far from contamination site were 38%, 31%, 7% and 2.6% respectively. TSP value of different types of greenbelt changed markedly, but TSP values were obviously different among types of greenbelt. In the three types of greenbelt, the change gradient of TSP value in arbor - shrub - lawn was the biggest, shrub - lawn second, lawn the smallest. The result revealed that dust catching capacity of arbor - shrub - lawn was the best.