本文選題：鳴翠湖 + 主成分分析　； 參考：《寧夏大學》2015年碩士論文

【摘要】：2014年,本文對銀川市鳴翠湖水環(huán)境因子進行了調(diào)查,運用了主成分的分析方法來對影響那些鳴翠湖水質(zhì)的比較重要的環(huán)境因子做出研究,通過運用了單因子的評價法,灰色關(guān)聯(lián)的分析方法以及模糊綜合評價法,以鳴翠湖的水環(huán)境為例子,對它的水質(zhì)情況作出了評價,得到了以下的結(jié)論：1.通過主成分分析得到的結(jié)果,以得到的特征值將鳴翠湖的水環(huán)境因子分成了2類。9個指標的全部信息都被第一與第二主成分包含了。同時,這兩者的累積貢獻率已達86.72%,所以它們對水質(zhì)是有主導作用的。其中主要包含的水質(zhì)因子為氟化物、五日生化需氧量、化學需氧量、透明度等,經(jīng)過分析,本文以為其水體的污染最可能的原因是有機物引起的。2.確定了影響鳴翠湖的水環(huán)境的主要因子,這些因此從大到小依次為：氟化物、五日生化需氧量、高錳酸鹽指數(shù)、透明度、總磷和化學需氧量以及葉綠素。對其綜合分析認為,氮、磷營養(yǎng)鹽在鳴翠湖水體中起主導作用,氮、磷含量的變化是引起鳴翠湖水質(zhì)變動的主要原因。3..本文用單因子評價法來對鳴翠湖水質(zhì)的水質(zhì)進行分析,并對鳴翠湖的水質(zhì)做出評價。2014年鳴翠湖四季的水質(zhì)都為Ⅳ類。全年綜合評價為Ⅳ類,灰色關(guān)聯(lián)法和模糊評價法對鳴翠湖水質(zhì)評價,雖然灰色關(guān)聯(lián)法與模糊評價法有一些差異,但綜合評價結(jié)果均為Ⅲ水質(zhì),因此鳴翠湖綜合水質(zhì)為Ⅲ類4.鳴翠湖綜合營養(yǎng)狀態(tài)指數(shù)隨著季節(jié)是變化的,最高值出現(xiàn)在了夏季,大約為62.59,已達到了中度富營養(yǎng)化水平。冬季相對來說是比較低的,其它的時間基本都在50-60之間。這個水平基本處于輕度富營養(yǎng)水平�？偟膩碚f,鳴翠湖目前的水質(zhì)大概是輕度富營養(yǎng)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，

本文編號：1829229