we compared isogradient obscure clustering method and isogenyv point obscure clustering method in the water environmental quality assessment of Nandujiang River the authors discuss the difference between the methods and point out that the isogeny point obscure clustering method is more practicable than isogradient obscure clustering method in handling weighting.

Comprehensive evaluation on water environment quality of Zhalong wetland based on grey clustering method;

Application of grey clustering method in eutrophication assessment for lake water;

Application of grey clustering method to rural groundwater quality evaluation in Tai-Lake Region;

We established water quality information database of 29 water quality test points in Panshi city based on ArcGIS,and evaluated the groundwater environment quality by using the gray clustering method.

Because gray clustering is an important method in decision making when the available data are limited, based on the statistical data available, the paper analyzes how to select the agricultural leading industries with the gray clustering method, and then explains the results q.

Application of Grey Clustering in Evaluation of the Water Quality of Banxi River;

Based on the surficial sediments from the Zhejiang offshore and the comprehensive assessment factors of seven trace metals,the assessment of environmental quality in the surficial sediments was made using the grey clustering.