Application of distinguishable weight based unascertained measure model in water quality assessment

The method of traditional fuzzy comprehensive evaluation model has one-sidedness in determining index weight and its evaluation results sometimes can´t fully and truly reflect the water quality. Based on unascertained comprehensive evaluation model this paper studies the water quality of Changjiang River in recent two years. Firstly, by preliminarily analyzing the water quality of Changjiang River, this paper obtains a more scientific evaluation index system. Then, through using distinguishable weight to determine the weight between each index and distinguishing the difference between each index weight, this paper establishes an unascertained measure comprehensive evaluation model of these index systems on the basis of meeting the consistency check. Finally, by instance analysis, the paper indicates that the results achieved by unascertained measure comprehensive evaluation model is basically in line with the practical situation and have great application and promotion value.