基于GeoDA的江苏省长江总磷空间关联度分析研究

利用地理空间分析方法和空间分析软件,采用2006年-2015年江苏省长江10个干流和45个入江支流监测点位的总磷浓度数据的年平均值,分析了江苏省长江干流和支流总磷浓度的空间相关性及其时空演变特征.分析发现长江总磷污染呈现全局正相关,相关指数总体呈现先减小后增加的趋势,直至2015年增至最大,干流总磷污染的重心先向西北后向西南移动,支流总磷污染的重心先向西北再向东南移动,重心移动幅度不大,并且二者均有向北面移动的趋势,同时移动幅度接近,长江干流总磷污染与支流的汇入是密不可分的.

Spatial Correlation of Total Phosphorus in Yangtze Riverof Jiangsu Province based on GeoDA

Based on annual mean value of total phosphorus in 10 boundary and 45 tributaries monitoring points in the Yangtze River between 2006 and 2015, the geographical and spatial analysis software were used to analyze the spatial correlation and temporal evolution characteristics of the Yangtze River and its tributaries in total phosphorus in Jiangsu Province.The finding showed that the total phosphorus pollution in the Yangtze River in Jiangsu province showed a positive correlation, and the correlation index showed the trend of first decreasing and then increasing until 2015 to the maximum.The focus of the boundary trend of total phosphorus pollution moved from the northwest to southwest while tributaries first to the northwest and then to the southeast trend, and movement range is not large, and the two are moving toward the north, movement amplitude approach.The Yangtze River TP pollution is closely related to the import of the tributary.