摘要
利用ArcGIS软件中的地统计分析模块对重庆市建成区大气中NO2的7次挂片监测数据进行了空间分析。研究表明,重庆市NO2挂片监测数据均符合正态分布或对数正态分布,且均呈现出较强的空间变异性。由地统计学块金效应参数可知,重庆市建成区NO2具有中等或弱的相关性。7次监测的NO2在长轴方向的变程分别为23.8,23.8,13.3,23.8,23.9,23.8和23.8km;在短轴方向的变程分别为8.1,9.2,6.9,5.0,10.2,7.1和6.1km。根据半变异函数拟合参数变程的物理意义,为重庆市建成区大气监测布点距离的选取提供理论依据,即长轴方向上布点间隔可以稍微偏大,约6～10km;短轴方向布点间距,约2～3km。
The spatial distribution characteristics of the NOe concentrations,which collected from repeat monitoring experiments, in built-up area of Chongqing were figured out by using the Geostatistical Analyst module of ArcGIS. The results show that the NO2 concentrations in built-up area of Chongqing are all subject to normal distribution or lognormal distribution ,with strong spatial variability. The nugget effeet parameters of geostatistiea~ ana!,ysis revea~ that NOz has medium or weak spatial relevance with different monitoring experiments. The major ranges of the seven times repeat monitoring experiments are 23.8, 23.8, la. 8, ga. 8,ga. 9, es. 8 and 2a. 8 km, and the minor ranges are 8.1, 9.2, 6.9, 5.0, 10.2, 7.1 and 6.1 km respectively. According to the interpretation of physical range pa- rameters in geo-statistics, the research provides some empirical evidences for the atmospheric monitoring station si- ting in built-up area of Chongqing, i.e. the distances between monitoring stations should be longer through the di- rection of major ranges,about 6 to 10 km, while short through the direction of minor ranges, about 2 to 3 km.
出处
《三峡环境与生态》
2013年第1期21-24,共4页
Environment and Ecology in the Three Gorges
