基于主成分分析的武汉市中山公园水体污染研究

Study on the water pollution of Zhongshan Park based on principal component analysis

为调查中山公园水体基本现状,并探究其污染程度,对中山公园水体进行全面采样监测,并基于主成分分析原理,分析中山公园水体的主要污染因子,构建综合评价函数判定水体类别.结果表明,主要污染因子为富营养化指标,尤其是TN,其次为有机物污染.17个采样点中,大部分点位水体属于Ⅳ类,占82%,其次为Ⅴ类水体,占12%,Ⅲ类水体仅占6%.且有一处水体恶化为劣Ⅴ类的可能性极大.总体上,该水体符合其作为娱乐水体的要求,但局部地区污染严重,亟待改善.

In order to survey the basic present situation and explore the current degree of water pollution in Zhongshan Park, we analyzed the main factors of water pollution in Zhongshan Park, and the comprehensive assessment function was structured to determine the water category through a comprehensive sampling and monitoring based on the theory of principal component analysis. The results showed that the main pollution factor was eutrophication indexes, especially TN ,followed by organic matter pollution. There were 17 sampling points, most of which belong to grade Ⅳ, accounting for 82%, followed by grade V, accounting for 12% and grade Ⅲ, accounting for 6%. And there was one point of water standing a chance of deteriorating to inferior grade Ⅴ. Overall, the water body conformed to the requirement as an entertainment one, but local pollution was serious, requiring to be improved urgently.