张广帅, 闫吉顺, 张全军, 赵全民, 蔡悦荫, 程博, 宫玮, 段后浪. 基于主成分分析法近岸海水环境质量与空间异质性研究—以庄河港近岸海域为例[J]. 海洋环境科学, 2020, 39(2): 244-252. DOI: 10.12111/j.mes20200212
引用本文: 张广帅, 闫吉顺, 张全军, 赵全民, 蔡悦荫, 程博, 宫玮, 段后浪. 基于主成分分析法近岸海水环境质量与空间异质性研究—以庄河港近岸海域为例[J]. 海洋环境科学, 2020, 39(2): 244-252. DOI: 10.12111/j.mes20200212
ZHANG Guang-shuai, YAN Ji-shun, ZHANG Quan-jun, ZHAO Quan-min, CAI Yue-yin, CHENG Bo, GONG Wei, DUAN Hou-lang. Study on the seawater quality and its spatial heterogeneity based on principle component analysis: A case study nearshore of Zhuanghe port[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2020, 39(2): 244-252. DOI: 10.12111/j.mes20200212
Citation: ZHANG Guang-shuai, YAN Ji-shun, ZHANG Quan-jun, ZHAO Quan-min, CAI Yue-yin, CHENG Bo, GONG Wei, DUAN Hou-lang. Study on the seawater quality and its spatial heterogeneity based on principle component analysis: A case study nearshore of Zhuanghe port[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2020, 39(2): 244-252. DOI: 10.12111/j.mes20200212

基于主成分分析法近岸海水环境质量与空间异质性研究—以庄河港近岸海域为例

Study on the seawater quality and its spatial heterogeneity based on principle component analysis: A case study nearshore of Zhuanghe port

  • 摘要: 为揭示北黄海海域近岸海水环境质量及其空间分布格局,对庄河港冬季表层海水环境质量进行了评价分析。在研究海域设置20个采样站位,运用主成分分析法,对庄河港近岸海水环境质量进行了评价分析,采用Kriging空间插值法对研究区域海水环境质量进行了空间异质性分析,采用相关性分析和回归分析法分析了水质参数之间及其与监测点地理位置之间的关系,采用冗余分析方法研究了海水环境质量对水体Chl a和溶解氧含量的影响。研究结果表明,该海域表层海水总无机氮含量高于《海水水质标准》中四类水质的要求,其余水质参数均符合一类水质要求;NO3-N和NO2-N以及PO4-P之间及其与Cd和Cr具有显著的相关性,污染来源相同;主成分分析表明,庄河港近岸海域海水环境质量是无机氮、无机磷以及与其有密切关系的Cd、Cr等水质因子综合作用的结果,且沿岸线方向的空间异质性明显,与用海方式相关;冗余分析表明近岸海水环境质量解释了Chl a和溶解氧空间分异的82.67%,叶绿素a浓度与表征无机氮和无机磷含量的主成分得分呈负相关性。

     

    Abstract: In order to reveal the water quality and its spatial pattern nearshore of the north yellow sea, this study evaluated the surface sea water quality in winter of Zhuanghe port.20 sampling sites were setup, and the principle component (PCA) analysis was applied to illustrate the seawater quality, combined with the Krigning spatial interpolation technology to display the spatial heterogeneity.Correlation analysis, regression analysis and redundancy analysis (RDA) were respectively used to reveal the main sources of the pollution and relationship between seawater quality with the geographical position of sampling sites, and to analyze effects of seawater quality on chlorophyll a and dissolved oxygen.Results showed that total inorganic nitrogen of surface seawater was higher than the fourth grade of seawater quality standard, and other water quality parameters all met the first grade.NO3-N, NO2-N and PO4-P were showed significant correlations with each other and with Cd and Cr, illustrating they had similar sources.Inorganic nitrogen, inorganic phosphorus and the related heavy metal elements mainly affected the seawater quality of this area, with a significant spatial heterogeneity along coastline direction, illustrating that seawater quality was also relevant to the utilization way of this area.Coastal water quality calculated by PCA explained 82.67% variation of chlorophyll a and dissolved oxygen.And chlorophyll a was significantly and negatively related with the principal component score which represented the inorganic nitrogen and phosphorus.

     

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