基于变异函数的大气污染物空间分布特征分析  

Characteristic Analysis of Spatial Distribution of Air Pollutants Based on Variogram

作　　者：徐伟嘉[1,2] 钟流举[3] 何芳芳[1,2] 李红霞[1,2] 

机构地区：[1]中山大学先进技术研究院,广东广州510275 [2]东莞中山大学研究院,广东东莞523808 [3]广东省环境监测中心,广东广州510045

出　　处：《环境科学与技术》2014年第12期73-77,84,共6页Environmental Science & Technology

基　　金：广东省自然科学基金(S2012010008943);佛山市科技发展专项资金项目(2012AA100741)

摘　　要：使用变异函数分析大气污染物分布的空间特征,如空间相关、方向效应、相似度、相关距离等。以珠三角区域2012年8月24日12时数据为例,提供进行经验变异函数拟合,相关分析,方向效应分析等一套研究思路和步骤,运用至2013年1月14日至20日一周的PM2.5数据分析中,分析显示,研究时段内的珠三角区域的PM2.5浓度分布具有空间相关性,且具有方向效应,相关距离和相关度的方向效应体现有所不同,东西方向相关距离最大为76 km,东北-西南方向的最小为60 km,而相关度效应的方向性体现不稳定,但总体上各方向的相关度都很接近。分析思路和结果对于污染物的监管和治理有一定参考价值,如基于空间相关性和相关距离实施地区联合管治,基于方向效应实施差异化和重点化管治。Variogram of geostatistic was used to analyze the spatial characteristics of atmospheric pollutants ＇distribution,including spatial correlation,directional effect,similarity level and correlation distance. The analysis of pollutants＇ data at 12 o ＇clock on the day Aug. 24 th in 2012 in the Pearl River Delta,which gives a set of research thought and step for going the fitting of experienced variogram function,correlation analysis,directional effect analysis,was applied to the data analysis of PM2.5for seven consecutive days starting from Jan.14 th in 2013,and analysis result showed that the distribution of PM2.5in the Pearl River Delta region during the study time period has the characteristics of spatial correlation with directional effect,but the directional effect is different between the correlation distance and similarity level,with the maximum correlation distance 76 km in East-West direction and the minimum correlation distance 60 km in Northeast-Southwest direction,while the directional effect of similarity level is unsteady,but the similarity level of all the directions is much closer. The analysis thought and result would make a contribution to the supervision and management of atmospheric pollutants,like the union governance of cities on the basis of spatial correlation,and the different and key governance on the basis of directional effect.

关 键 词：污染物浓度 变异函数 各向异性 各向同性 玫瑰图 

分 类 号：X511[环境科学与工程—环境工程]