Grey clustering evaluation for groundwater quality

Base on MATLAB software, a grey clustering analysis method was applied to evaluate groundwater quality in this paper. Groundwater quality was divided into four grey grades, such as excellent (A-level), good (B-level), average (C-level) and poor (D-level). According to the grey clustering method, the evaluation matrix, whiten weight functions of every grey grade and comprehensive decision weights were given. At last the evaluation results were compared with other analysis data. Evaluation results suggest that: the theory of grey clustering evaluation for groundwater quality is practicable and reliable.