Abstract
According to the fact that environmental pollution and its degree belongs to fuzzy concept, this paper establishes a water quality evaluation model based on fuzzy pattern recognition theory. The ten monitoring sections of Qiantang River are sampled to carrying out water quality evaluation research. The evaluation index takes total phosphorus (TP), chemical oxygen demand (COD), ammonia nitrogen (NH 3 -N), dissolved oxygen (DO), etc. The results show that the proposed model for water quality evaluation is reasonable and satisfactory.
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