乌鲁木齐市近年来大气降尘变化规律及空间分布特征

Atmospheric dustfall variation and spatial distribution characteristics in Urumqi for recent years

基于乌鲁木齐市多年监测的降尘数据,对乌鲁木齐市城区的降尘量进行了统计分析,得出了乌鲁木齐市近10年来降尘的总体变化规律;利用方差分析方法检验了不同季节降尘的显著性差异,发现采暖期的降尘量明显大于非采暖期;按行政区分析降尘量的分布变化,结果为不同行政区存在差别;利用秩相关系数法对其进行了趋势分析。结果表明,乌鲁木齐市的降尘呈下降趋势。利用Arc GIS9.3中的普通克里格插值方法绘制了乌鲁木齐市城市自然降尘的空间分布图。

Based on the data of dust in Urumqi in recent years, Urumqi dusffall undertook statistic was analysed and the gen- eral regularity of dust in Urumqi city in recent 10 years was gained. It was found that the amount of dustfall in heating period was significantly greater than that of non - heating period by using analysis of variance of dustfall significant differences in dif- ferent seasons. The dustfall volume distribution of different administrative region was analysed by using the correlation coeffi- cient method and the results showed that the dustfall in Urumqi City declined. The map of Urumqi City dust spatial distribution was drawed by using ArcGISg. 3 in the ordinary Kriging interpolation method.