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中文摘要：
2014年1-10月,在对银川市鸣翠湖水环境因子调查的基础上,运用主成分分析方法分析研究影响鸣翠湖水质的主要环境因子,运用灰关联法和模糊综合评价法对鸣翠湖的水质状况进行综合评价,结果表明,造成鸣翠湖水环境污染的水环境因子分为3类,第1类是氮磷营养盐与有机物引起的水体污染,包含的因子为叶绿素a（Chl.a）、总氮（TN）、总磷（TP）、高锰酸盐指数（CODMn）;第2类是氮营养盐引起的水体污染,包含的因子为氨氮（NH3-N）、五日生化需氧量（BOD5）;第3类为溶解盐类引起的水体污染,包含的因子为pH。鸣翠湖水环境的主要因子依次为pH、NH3-N、TN、TP、Chl.a、CODMn、BOD5,氮、磷营养盐在爱伊河水体中起主导作用。鸣翠湖水质综合评价结果为Ⅳ类。
英文摘要：
Bsaed on the investigation of the water environment factors and aquatic biodiversity of Mingcuihu lake from January to October 2014, the principal component analysis was selected to analyze the water environmental factors of Mingcuihu lake.The fuzzy comprehensive evaluation method and the gray correlative degree method was also used to evaluate the water quality of Mingcuihu lake.The result showed that the water environmental factors which caused water environment pollution of Mingcuihu lake can be divided into three types. The factors which caused nitrogen, phosphorus nutrient and organic pollutants were Chlorophyll a, total nitrogen（TN）, total phosphorus（TP） and potassium permanganate index（CODMn）.The factor caused nitrogen nutrient pollution were ammonia nitrogen（NH3-N） and 5 days biochemical oxygen demand（BOD5）. The factors which caused dissolved salts pollutants was pH. The water environmental factors followed by the importance which had affected on water quality of Mingcuihu lake ranged as follows： pH,NH3-N,TN,TP,Chl.a,CODMnand BOD5. The water environmental factors which played a leading role on water quality of Mingcuihu Lake were nitrogen and phosphorus nutrient. The comprehensive evaluation result of Mingcuihu lake water quality was Ⅳ class.
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