鸣翠湖水环境因子分析及水质综合评价

发布时间：2018-05-01 11:41

  本文选题：鸣翠湖 + 主成分分析　； 参考：《宁夏大学》2015年硕士论文

【摘要】：2014年,本文对银川市鸣翠湖水环境因子进行了调查,运用了主成分的分析方法来对影响那些鸣翠湖水质的比较重要的环境因子做出研究,通过运用了单因子的评价法,灰色关联的分析方法以及模糊综合评价法,以鸣翠湖的水环境为例子,对它的水质情况作出了评价,得到了以下的结论：1.通过主成分分析得到的结果,以得到的特征值将鸣翠湖的水环境因子分成了2类。9个指标的全部信息都被第一与第二主成分包含了。同时,这两者的累积贡献率已达86.72%,所以它们对水质是有主导作用的。其中主要包含的水质因子为氟化物、五日生化需氧量、化学需氧量、透明度等,经过分析,本文以为其水体的污染最可能的原因是有机物引起的。2.确定了影响鸣翠湖的水环境的主要因子,这些因此从大到小依次为：氟化物、五日生化需氧量、高锰酸盐指数、透明度、总磷和化学需氧量以及叶绿素。对其综合分析认为,氮、磷营养盐在鸣翠湖水体中起主导作用,氮、磷含量的变化是引起鸣翠湖水质变动的主要原因。3..本文用单因子评价法来对鸣翠湖水质的水质进行分析,并对鸣翠湖的水质做出评价。2014年鸣翠湖四季的水质都为Ⅳ类。全年综合评价为Ⅳ类,灰色关联法和模糊评价法对鸣翠湖水质评价,虽然灰色关联法与模糊评价法有一些差异,但综合评价结果均为Ⅲ水质,因此鸣翠湖综合水质为Ⅲ类4.鸣翠湖综合营养状态指数随着季节是变化的,最高值出现在了夏季,大约为62.59,已达到了中度富营养化水平。冬季相对来说是比较低的,其它的时间基本都在50-60之间。这个水平基本处于轻度富营养水平。总的来说,鸣翠湖目前的水质大概是轻度富营养水平。
[Abstract]:In 2014, this paper investigated the water environmental factors of Mingcui Lake in Yinchuan City, and used the principal component analysis method to study the more important environmental factors that affect the water quality of Ming Cui Lake, and applied the single factor evaluation method. Taking the water environment of Ming Cui Lake as an example, the grey relation analysis method and fuzzy comprehensive evaluation method are used to evaluate its water quality, and the following conclusions are obtained: 1. Based on the results obtained by principal component analysis, the water environmental factors of Ming Cui Lake are divided into two categories with the obtained eigenvalues. All the information of 9 indexes are included by the first and second principal components. At the same time, the cumulative contribution rate of these two has reached 86.72, so they play a leading role in water quality. The main water quality factors are fluoride, 5 days biochemical oxygen demand, chemical oxygen demand, transparency and so on. The main factors affecting the water environment of Mingcui Lake were determined. The order from large to small was fluoride, 5-day biochemical oxygen demand, permanganate index, transparency, total phosphorus and chemical oxygen demand and chlorophyll. The comprehensive analysis shows that nitrogen and phosphorus nutrients play a leading role in the water body of Ming Cui Lake, and the change of nitrogen and phosphorus content is the main reason for the change of water quality of Ming Cui Lake. In this paper, the water quality of Ming Cui Lake is analyzed by single factor evaluation method, and the water quality of Ming Cui Lake is evaluated. The water quality of Ming Cui Lake is evaluated by grey correlation method and fuzzy evaluation method. Although there are some differences between grey correlation method and fuzzy evaluation method, the comprehensive evaluation results are all 鈪，

本文编号：1829229