Spatial Autocorrelation Analysis of Urban Circulated Vegetable Area Pollution
Based on the five vegetable sampling areas of Conghua, Huaduo, Zengchen, Baiyun and Panyu of Guangzhou city from 16 Nov.to 30 Nov.2012 as the study units, this paper used the vegetable actual sampling data to establish the area vegetable pollution index system, and got the area vegetable pollution index by means of the principal component analysis, then the spatial auto-correlation analysis was performed in the area vegetable pollution index.The results of global Moran's I indicated that, with the global Moran's I of vegetable pollution as 0.28 and Z(I) more than 1.96 on 28 Nov.2012, the vegetable pollution state in these five monitoring areas appeared significant spatial plus autocorrelation which mean the vegetable pollution state was gathering phenomenon, and the rest time of global spatial were not autocorrelation.The results of local Moran's I showed that the vegetable pollution in Conghua appeared spatial divergence, while the vegetable pollution in Zengchen emerged spatial gathering on 19 Nov.The vegetable pollution in Huaduo appeared significant spatial plus autocorrelation on 25 Nov.and the other time there was no significant local spatial autocorrelation in the five vegetable sampling areas.
area vegetable pollution indexglobal spatial autocorrelationlocal spatial autocorrelation
NETL
NSTL
万方数据
维普
