Applies the fuzzy mathematics to carry on the synthesis appraisal to the water quality, has introduced the subordination function, various factors weight concept and so on distribution coefficient as well as fuzzy compound operation, has overcome in a general water quality appraisal method subjective free influence bigger shortcoming, increased the appraisal result resolution This article through has carried on the fuzzy synthesis appraisal to Wen Rui river each monitor cross section water quality, its appraisal result and the traditional single factor appraisal method obtained result carried on the comparison to indicate, this method objectively had reflected the water body water quality condition, simultaneously also enhanced the model the Versatility and the appraisal result commeasurability.
