Evaluation of environmental impact of red tide around Pearl River Estuary, Guangdong, China

Yu-Lin Chen; Lin-Shuang Zhao; Annan Zhou; Shui-Long Shen

doi:10.1016/j.marenvres.2023.105892

Evaluation of environmental impact of red tide around Pearl River Estuary, Guangdong, China

Mar Environ Res. 2023 Mar:185:105892. doi: 10.1016/j.marenvres.2023.105892. Epub 2023 Jan 20.

Authors

Yu-Lin Chen¹, Lin-Shuang Zhao², Annan Zhou³, Shui-Long Shen⁴

Affiliations

¹ Department of Civil Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
² MOE Key Laboratory of Intelligent Manufacturing Technology, Department of Civil and Environmental Engineering, College of Engineering, Shantou University, Shantou, Guangdong, 515063, China. Electronic address: lshzhao@stu.edu.cn.
³ Discipline of Civil and Infrastructure Engineering, School of Engineering, Royal Melbourne Institute of Technology, Victoria, 3001, Australia.
⁴ MOE Key Laboratory of Intelligent Manufacturing Technology, Department of Civil and Environmental Engineering, College of Engineering, Shantou University, Shantou, Guangdong, 515063, China. Electronic address: shensl@stu.edu.cn.

PMID: 36689845
DOI: 10.1016/j.marenvres.2023.105892

Abstract

This paper presents a case study of red tide hazards around the Pearl River Estuary (PRE). Red tide hazards, meteorological data, and seawater monitoring data were collected from 1996 to 2020 at different locations around the PRE to investigate the internal and external factors influencing the occurrence of red tides. The enhancement of the assessment of estuarine trophic status (ASSETS) method enables us to evaluate the effects of meteorological factors and seawater eutrophication status on the red tide risk level. Using ASSETS, we established a framework for red tide risk assessment of the Pearl River Estuary. We analysed the external and internal factors causing the red tide based on meteorological data and seawater monitoring data in the PRE. The results show that the temperature was higher than the annual monthly average temperature of 1.265 °C, and east and north winds at velocities of 3-4 m/s could result in the formation of red tides. However, precipitation inhibits the formation of the red tide in PRE.

Keywords: ASSETS method; External factors; Interior factors; Pearl River Estuary; Red tide; Risk assessment.

MeSH terms

China
Environmental Monitoring
Estuaries
Harmful Algal Bloom*
Rivers*
Seawater