龙岩市PM_(10)污染受山谷风出现频率的影响分析

利用福建省龙岩市2006-2009年PM10的监测数据和龙岩市地区山谷风各风向的统计数据,进行了单因素方差分析、一元线性相关分析等统计分析,结果表明龙岩市区PM10浓度与N风向、NW风向、NNW风向的出现频率之间有较密切的关系。这些风向的出现会导致污染物堆积在谷底范围之内,阻碍了PM10污染物向谷外的扩散,使得处于谷底的龙岩市大气中的PM10浓度不断增加。

Single factor analysis of variance and simple linear correlation analysis are conducted on the basis of statistics data of PM10eoncentration and mountain-valley wind direction data from 2006 to 2009,the results show that PM10 concentration relates very closely to the occurrence frequency of N wind, NW wind and NNW wind direction. The occurrence of these wind direction leads to pollutants accumulation at the bottom of valley, and blocks pollutant diffusion to the outside of valley, as the result, PM10 concentration in Longyan city will get increasing.