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Journal of Tropical Oceanography >

2015 , Vol. 34 >Issue 4: 83 - 89

DOI: https://doi.org/10.11978/j.issn.1009-5470.2015.04.012

Environmental Oceanography

Tidal variation in the distributions of dissolved Cd and Pb in the Modaomen Channel of the Pearl River Estuary

  • SHI Rong-gui ,
  • LONG Ai-min ,
  • WU Ling-ling ,
  • LAN Sheng-ying
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  • 1. South China Sea Environment Monitoring Center, State Oceanic Administration, Guangzhou 510300, China;
    2. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China;

Received date: 2014-08-27

  Online published: 2015-08-21

Supported by

; *感谢中国科学院南海海洋研究所王军、张镇秋和李先鹏在现场采样过程中给予的大力协助。

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Abstract

Tides can cause changes in hydrodynamics and have great influence on the fate of heavy metals in estuary. The distributions of dissolved Cd and Pb in the Modaomen Channel were investigated in September 2011. During neap tide, Cd concentration increased from river end member to sea end member; Cd stratification was also found. The fate of Cd was subjected to dilution by sea water of low Cd concentration during spring tide. There were large differences of sectional distribution characteristics between Cd and Pb. The sectional distribution of Pb was complicated. During the neap tide anchor survey, Cd stratification was obvious. During the spring tide anchor survey when strong salt-water intrusion occurred, the fates of Cd and Pb were mainly decided by physical dilution of sea water.

Key words： Cd; Pb; tide; Modaomen Channel

Cite this article

SHI Rong-gui , LONG Ai-min , WU Ling-ling , LAN Sheng-ying . Tidal variation in the distributions of dissolved Cd and Pb in the Modaomen Channel of the Pearl River Estuary[J]. Journal of Tropical Oceanography, 2015 , 34(4) : 83 -89 . DOI: 10.11978/j.issn.1009-5470.2015.04.012

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