基于模糊综合评判法的衡水湖水环境评价

Evaluation of Hengshui Lake Water Environment with Fuzzy Comprehensive Evaluation Method

衡水湖作为一个较大型的水环境,在对其进行综合评价时会涉及大量的复杂现象和多种复杂因素的相互作用,存在大量的模糊现象和模糊概念.选取7个测点的溶解氧、氨氮、总磷、总氮、高锰酸钾5项指标作为评价因子,使用模糊综合评判法计算得出了各测点的污染级别,用国家《地表水环境质量标准》作为参照.结果表明:测点1、3、5、6符合国家标准,测点2、4、7不符合国家标准,应该对这些测点的水域加强管理,对污染物加强处理,进一步改善水质环境.

When a comprehensive evaluation on Hengshui Lake, a large water environment, is carded out, it will involve a lot of complex phenomena and the interaction of various complicated factors. There are plenty of fuzzy phenomena and fuzzy concept. The article chooses five indexes of seven measure points as evaluating factors. They are dissolved oxygen, ammonia nitrogen, total phosphorus, total nitrogen and potassium permanganate. The pollution level of each point is calculated with the fuzzy comprehensive evaluation method. The results show that, when The National Standards of Surface Water Environment Quality is referred to, Point 1, Point 3, Point 5 and Point 6 are in line with the national standard, while Point 2, Point 4 and Point 7 are not conform to the national standard. Therefore, the management of the waters of Point 2, Point 4 and Point 7 should be strengthened; the treatment of pollutants should be reinforced and the water quality of the environment should be improved.