摘要
根据辽东湾海域2004年6月与8月调查资料,通过主成分分析与聚类分析,研究水体中主成分及污染源分布的特点,并运用模糊数学的方法对海域的水质进行综合评价。研究结果表明,辽东湾海域水体中8种污染物的全部信息可由3个主成分来反映,它们的贡献率分别为39.89%、21.01%、12.74%。本次研究所调查的16个站位在污染程度上可分为4类,具有污染物近岸浓度高远岸浓度低的空间分布特点。辽东湾北部海域局部受到污染,污染区域主要分布在辽河口与双台子河口海域。辽东湾海域8月与6月Ⅰ类水质的隶属度分别为78%和67%,8月海水水质优于6月。
In order to investigate the distribution characteristic of elements in seawater and the situation of seawater quality, Principal component and Cluster analysis were applied to study the sources of contamination and a fuzzy mathematics was developed to conduct comprehensive evaluation of the seawater quality based on survey of Liaodong Bay in June and August in 2004. Results showed that the first three components accounting for 39.89%, 21.01% ,and 12.74% of the total variance. And 16 stations investigated were divided into four groups, which indicated the decreasing trend in spatial distribution from inshore to offshore. The seawater quality was poorer near Liaohe Eastuary and Shuangtaizi River Eastuary where the membership degrees were 58% and 74% , close to the class Ⅱ seawater quality. The membership degrees of June and August were 67% and 78% ,close to the class Ⅰ seawater quality.
出处
《水产科学》
CAS
北大核心
2008年第6期302-305,共4页
Fisheries Science
关键词
辽东湾
主成分分析
分布特征
模糊数学评价
Liaodong Bay
principal component analysis
distribution characteristic
fuzzy mathematics
