道路环境颗粒物浓度空间分布研究

Spatial Distribution of PM_(10) in Regional Road Environment

由于交通扬尘和车辆尾气排放,道路环境颗粒物浓度高于城市其它区域,文章应用一种移动监测技术测试区域道路环境中PM10浓度空间分布,并进行了呼市城区道路环境PM10空间分布分析;采用降尘法对呼市城区不同区域30条道路进行监测,分析道路降尘空间分布规律,并对两种方法进行比较。文章给出了呼市城区道路环境PM10浓度的空间分布图和不同区域道路降尘分布图,直观显示出PM10浓度空间分布情况,突出了污染的重点区域。道路环境PM10浓度主要分布在0.021.00 mg/m^3之间,降尘量在1085（t/km^2·30 d）之间。道路环境PM10浓度空间分布于道路降尘空间分布总体趋势一致,并分析了道路环境颗粒物浓度差异的原因,高浓度区域主要是由于施工活动密集、路面破损和路面两侧存在裸土。空间浓度分布为道路扬尘控制措施的科学安排和控制效果评估提供技术支持。

Particulate matter concentration in street is higher than clean area in metropolitan due to traffic dust and vehicle exhaust.A mobile monitoring system was established to measure and analyze PM10 concentration spatial distribution of roads in Hohhot,Inner Mongolia.Thirty dust fall monitoring sites were set up to study spatial distribution of dust fall in Hohhot roads.Maps of roads PM10 and dust fall spatial distribution in Hohhot indicated that the trend of PM10 and spatial distribution of dust fall was found coherent,and the key spots or areas with significant pollution can be figured out easily,with PM10 concentration mainly between 0.021.00 mg/m^3 and road dust fall between 1085（t/km^2·30 d）.It was found that highly concentration areas mainly appear in near construction sites,road surface disrepair,and unpaved surface along the road. Spatial distributions would provide technical support for more reasonable and efficient control of road dust.