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ORIGINAL RESEARCH article

Front. Water
Sec. Environmental Water Quality
Volume 6 - 2024 | doi: 10.3389/frwa.2024.1397673

Comprehensive analysis and evaluation of water quality in the northwest coastal waters of Liaodong Bay

Provisionally accepted
Yu Datao Yu Datao 1Zhang Shijie Zhang Shijie 1Zhang Shuang Zhang Shuang 1Ji Nannan Ji Nannan 2*
  • 1 National Marine Environmental Monitoring Center, Dalian, Liaoning Province, China
  • 2 Dalian University, Dalian, China

The final, formatted version of the article will be published soon.

    In order to understand the pollution degree and eutrophication status of the northwest coastal waters of Liaodong Bay, this study conducted 7 Marine surveys from 2011 to 2020, collected monitoring data from 130 monitoring stations, and systematically evaluated the whole sea area by using single factor mass method, eutrophication index method, potential eutrophication evaluation model and organic pollution index method. The results showed that the main pollution factors were inorganic nitrogen (DIN), chemical oxygen demand (COD) and plumbum (Pb) by single factor index and principal component analysis (PCA). In recent years, the study area basically presents a potential eutrophication state limited by phosphorus, with N/P greater than Redfield ratio. The eutrophication and organic pollution of seawater were positively correlated with DIP and DIN, respectively. Therefore, DIP and DIN are the main factors affecting the overall water quality, which indirectly proves that the quality of seawater water quality is mainly affected by land-based pollution. The research results provide a scientific basis for environmental control in the northwest coastal waters of Liaodong Bay, and provide strong support for continuing to fight the battle of pollution control in coastal waters and accelerating the protection and restoration of water ecological environment.

    Keywords: seawater quality, Eutrophication, organic pollution, Liaodong Bay, Ecological environment

    Received: 08 Mar 2024; Accepted: 13 May 2024.

    Copyright: © 2024 Datao, Shijie, Shuang and Nannan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Ji Nannan, Dalian University, Dalian, China

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