Grey Relating Model Based on Coefficient of Entropy and Its Application to Underground Water Quality Evaluating

According to independence and non-compatibility of indexes in the evaluating of water quality, this research builds up a new model based on coefficient of entropy to evaluate water quality, which combines entropy value theory and grey relating degree together. Entropy value method is adopted to calculate coefficient of weight and this avoid problems of distribution difficulty through using experts´ experience. A new method is exercised to evaluate water quality in this paper, the outcome from application shows applicability to water quality evaluating.