FUZZY COMPREHENSIVE EVALUATION FOR WATER QUALITY
水环境质量模糊综合评价中的一些问题探讨

The fuzziness of classification for water quality by pollution indices, the statistical fluctuation of measured data of pollution and comprehensive evaluation of multiple parameters were discussed. For defining the classification standard of water quality, the difference of the standard values between two neighbor classes should be larger than confident interval of measured data at given significant level. The effect of the statistical fluctuation of measured data on the calculation of membership degree was evaluated and some formulas for calculating membership degree were recommended.