The influence of hydrodynamic characteristics on the distribution of chlorophy ll concentration in the maximum turbidity of the Yalu Estuary

YU Xin; DU Jiabi; GAO Jianhua; YANG Yang; RAN Longjiang; LI Fuxiang; LIU Yue; CHENG Yan

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YU Xin, DU Jiabi, GAO Jianhua, YANG Yang, RAN Longjiang, LI Fuxiang, LIU Yue, CHENG Yan. The influence of hydrodynamic characteristics on the distribution of chlorophy ll concentration in the maximum turbidity of the Yalu Estuary[J]. Haiyang Xuebao, 2012, 34(2): 101-113.

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The influence of hydrodynamic characteristics on the distribution of chlorophy ll concentration in the maximum turbidity of the Yalu Estuary

1.
Key Laboratory of Ministry of Education for Coastal and Island Development, Nanjing University, Nanjing 210093, China
2.
School of Urban construction, School of Liaodong, Dandong 118003, China

Abstract

Abstract

There exists unique ecological dynamic process in the estuarine maximum turbidity zone. Based on the data of velocity, chlorophyll concentration and turbidity at two mooring stations at upstream and downstream areas of the maximum turbidity zone of the Yalu River, the variations of suspended sediment and chlorophyll concentration is analyzed during neap and spring tidal cycles, and the relationship between the chlorophyll concentration and the hydrodynamic characteristion is discussed through transport flux decomposition of suspended sediment and chlorophyll. The results indicate that the distributions of higher suspended sediment concentration are consistent with thoses of chlorophyll concentration, especially in the bottom both in spring and neap tide. Sea bed sediment resuspension in the bottom caused by strong tides plays a major role in the formation of the estuarine maximum turbidity zone in the Yalu River. The relationship between the suspended sediment and chlorophyll concentrations in the bottom is higher than that in the surface, and more correlated in spring tides than that in neap tides, which, in a way, indicates that hydrodynamic characteristics have a significant impact on the distribution of chlorophyll a concentration distribution in time and space. High chlorophylla concentration distribution is mainly due to resuspension which makes the sediment and benthic algae in the bottom accumulate in bottom water. However, this conclusion remains to be tested with further research.
- hydrodynamic characteristics,
- formation mechanism of maximum turbidity zone,
- suspended sediment concentration,
- chlorophyll concentration,
- flux decompose,
- Yalu Estuary

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References(42)

References

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