基于综合集成赋权法的北之江水质模糊综合评价

Fuzzy Comprehensive Evaluation of Beizhijiang Water Quality Based on Comprehensive Weighted Combination Method

为避免各指标主观权重和客观权重对水质评价结果的影响,构建了基于综合集成赋权法的模糊综合评价模型,并将之应用于北之江五个监测断面的水质评价中。结果表明,北之江中下游水质无污染,水质状况良好;北之江上游氨氮、粪大肠菌群超标,水质为Ⅳ类水,水质污染严重,究其原因主要为当地农村生活污水及农业面源污染所致。评价结果与北之江实测结果较为吻合,评价模型具有较高的实用价值。

In order to avoid the influence of subjective weight and objective weight on the result of water quality evaluation, a fuzzy comprehensive evaluation model based on comprehensive weighted combination method is established to evaluate the water quality of five monitoring sections in Beizhijiang River. The evaluation results show that the water of the middle and downstream is not polluted, the water quality is in good condition; the content of Ammonia nitrogen and class Ecoli exceed standard in the upstream of Beizhijiang river, the water quality is at grade Ⅳ ,water pollution is serious. The main source of pollution is the local rural domestic sewage and agricultural non-point source pollution. The evaluation result is consistent with the actual situation of Beizhijiang, and the evaluation model has a relatively high application value.