Journal of Tropical Oceanography ›› 2024, Vol. 43 ›› Issue (4): 153-164.doi: 10.11978/2023130CSTR: 32234.14.2023130

• Marine Environmental Science • Previous Articles     Next Articles

Analysis of water environmental changes and influencing factors in the southwestern waters of the Daya Bay based on continuous monitoring data from dual buoys

XI Chen1(), LIN Zongxuan2, SA Rula3, DENG Xi1, LIU Qiang1, NI Liang1, LUO Laicai4, MA Teng5, XIE Zhijie6, CHEN Siruo2, CHEN Songze3()   

  1. 1. China Nuclear Power Technology Research Institute Co., Ltd., Shenzhen 518000, China
    2. Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology, Shenzhen 518055, China
    3. Shenzhen Ecological and Environmental Monitoring Center of Guangdong Province, Shenzhen 518049, China
    4. Shenzhen Lightsun Industry Co. Ltd., Shenzhen 518000, China
    5. Harbin Engineering University, Harbin 150001, China
    6. Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen 518005, China
  • Received:2023-08-29 Revised:2023-09-26 Online:2024-07-10 Published:2024-07-22
  • Supported by:
    National Natural Science Foundation of China(42141003); Key Program of Guangdong Basic and Applied Basic Research Fund (Guangdong-Shenzhen Joint Fund)(2021B1515120080); Shenzhen Key Laboratory of Marine Archaea Geo-Omics, Southern University of Science and Technology(ZDSYS201802081843490); Special Funds for the Cultivation of Guangdong College Students’ Scientific and Technological Innovation(pdjh2022c0029)

Abstract:

The monitoring of water quality is very important to understand the changes in marine ecosystem. Based on the continuous monitoring data of two buoys in the southwest of the Daya Bay from 2022 to 2023, this paper analyzes the time series changes in water quality environment. The results showed that the temperature and salinity in the southwest of the Daya Bay were affected by solar radiation and precipitation, with obvious seasonal differences. The temperature and salinity were high in summer and low in winter; chlorophyll a, dissolved oxygen and pH showed obvious diurnal changes. In summer and autumn, the Dapeng Cove was characterized by high temperature, low salinity, low dissolved oxygen, low pH, and high chlorophyll a compared with the Yangmeikeng. Pearson correlation analysis showed that there was a significant correlation among temperature, salinity, dissolved oxygen, pH, and chlorophyll a in summer and autumn, and there were regional differences. Near the bay mouth, waves, upwelling, and other water movements may be the main influencing factors; nearshore, the increase of runoff input may be the primary dominant factor causing changes of water quality. In addition, this article also recorded the impact of distant typhoons causing waves and precipitation events, thus affecting the environment of the Daya Bay. Analyzing the characteristics of the changes in the time series of coastal environmental parameters has important implications for studying the evolutionary characteristics of marine ecosystems.

Key words: Daya Bay, coastal area, environmental parameters, online monitoring, distribution characteristic