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根据2013年5月(春季)和8月(夏季)莱州湾海水环境要素的调查资料,通过主成分分析提取了3个主成分,累计表达原数据矩阵78.57%的信息,然后分别利用监测要素和主成分综合得分的层次聚类分析筛选出监控指标,并确定了水质污染状况及主要污染区域.结果表明,2013年莱州湾水质春季和夏季较差,导致水质状况恶化的主要要素是溶解无机氮,水质污染程度在时间和空间上存在较大差异,总体上春季海水污染程度高于夏季,莱州湾西侧和南侧处于严重污染或中度污染水平,因此常规监测中应重点关注化学需氧量、无机氮、叶绿素a和石油类这4个指标.
According to the survey data of marine environmental factors in Laizhou Bay in May 2013 (spring) and August (summer), three principal components were extracted by principal component analysis, and 78.57% of the original data matrix was expressed. Then, According to the hierarchical clustering analysis of the main components, the monitoring indicators were screened and the status of water pollution and the main pollution areas were determined.The results showed that the main elements of the deterioration of water quality in spring and summer of Laizhou Bay in 2013 were dissolved inorganic nitrogen , The degree of water pollution is quite different in time and space. In general, the pollution degree of seawater in spring is higher than that in summer, and the west and south of Laizhou Bay are at the level of serious pollution or moderate pollution. Therefore, routine monitoring should focus on chemical oxygen demand Volume, inorganic nitrogen, chlorophyll a and petroleum 4 indicators.