Water quality and eutrophication in the Guangzhou Sea Zone of the Pearl River estuary

Peng Wei; Liangmin Huang

doi:10.1007/s00343-010-9032-3

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Water quality and eutrophication in the Guangzhou Sea Zone of the Pearl River estuary

Updated：2023-05-16

- Water quality and eutrophication in the Guangzhou Sea Zone of the Pearl River estuary
- Journal of Oceanology and Limnology Vol. 28, Issue 1, Pages: 113-121(2010)
- Affiliations：
  
  1. Key Laboratory of Marine Bio-resources Utilization South China Sea Institute of Oceanology Chinese Academy of Sciences
  2. Marine and Fishery Environment Monitoring Center of Guangzhou
  3. Graduate School of Chinese Academy of Sciences
- Author bio：
- Funds：
- DOI：10.1007/s00343-010-9032-3
  CLC：
- Online First：27 January 2010，
  
  Published：2010
- Accepted：
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Wei, P., Huang, L. Water quality and eutrophication in the Guangzhou Sea Zone of the Pearl River estuary., Chin. J. Ocean. Limnol. 28, 113–121 (2010). https://doi.org/10.1007/s00343-010-9032-3
DOI：

Wei, P., Huang, L. Water quality and eutrophication in the Guangzhou Sea Zone of the Pearl River estuary., Chin. J. Ocean. Limnol. 28, 113–121 (2010). https://doi.org/10.1007/s00343-010-9032-3 DOI：

摘要

Abstract

To gain a better understanding of water quality and eutrophication

we investigated the seasonal and spatial distribution of water quality at 17 stations in the Guangzhou Sea Zone (GZSZ). Nutrients

chlorophyll-a (Chl-a)

salinity

chemical oxygen demand

and other physical and chemical parameters were determined in February

May

August and October from 2005 to 2007. The concentrations showed ranges of 93.2–530.4 μmol/L for dissolved inorganic nitrogen (DIN)

0.62–3.16 μmol/L for phosphate (PO4-P) and 50–127 μmol/L for silicate (SiO3-Si). The results indicated that DIN was strongly influenced by domestic sewage coming from Guangzhou City and NO3-N was the main form of DIN in most areas

while concentrations of phosphate and silicate were generally controlled by Pearl River runoff

land-based sources along the land or islands

and algae assimilation. N/P ratios were very high in both dry season and wet season

and varied from 57 to 667

suggesting that P was potentially the most limiting nutrient in the GZSZ. The concentrations of Chl-a were 3–96 μg/L

and were highly correlated with the distribution characteristics of COD. The concentrations of nutrients have increased over the past two decades (1982–2007). This means it is necessary to control the input of nutrients to the GZSZ

especially that of phosphate.

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