Water Quality Evaluation Based on Fuzzy Mathematics in Groundwater Resource Area of SuoLuoShu in Shan Dong Provence

摘要

Based on the theory of membership degree and comprehensive evaluation in the Fuzzy mathematics, 15 groundwater samples form SuoLuoShu water resource were collected and assessed. Through the analysis of water quality and the local pollution characteristics, chloride, sulfate, nitrate nitrogen, total dissolved solids, total hardness were selected to be the evaluation index system. And the value of the corresponding indexes of 5 grades in the national water quality standard was the comprehensive evaluation level in this study. On this basis, the membership degrees of the groundwater samples in the 5 grades were calculated and by using the maximum membership principle, the groundwater grade of each samples were determined. The results show that the groundwater quality in this area is better generally. 80% of the samples measure up the standard of grade III and the three samples beyond it were all caused by the nitrate nitrogen pollution which was brought by human activities.