Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River

Deng Zhirui; He Qing; Yang Qingshu; Lin Jianliang

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Deng Zhirui, He Qing, Yang Qingshu, Lin Jianliang. Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River[J]. Haiyang Xuebao, 2015, 37(9): 152-161.

Citation:

Deng Zhirui, He Qing, Yang Qingshu, Lin Jianliang. Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River[J]. Haiyang Xuebao, 2015, 37(9): 152-161.

Deng Zhirui, He Qing, Yang Qingshu, Lin Jianliang. Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River[J]. Haiyang Xuebao, 2015, 37(9): 152-161.

Citation:

Deng Zhirui, He Qing, Yang Qingshu, Lin Jianliang. Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River[J]. Haiyang Xuebao, 2015, 37(9): 152-161.

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Observations of in situ flocs characteristic in the Modaomen Estuary of the Pearl River

1.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
2.
Institute of Estuarine and Coastal Research, Sun Yat-Sen University, Guangzhou 510275, China

Received Date: 2015-01-22
Rev Recd Date: 2015-04-09

Abstract

Abstract

The Laser In Situ Scattering and Transmissometry-100(LISST-100)was used to the field observation in the Modaomen Estuary of the Pearl River during the July 2013(flood season). Based on the in situ data,we get some flocculation information: the dispersion of suspended sediment particle size is about 27.9 μm,the measured floccules mean diameter is about 91.6 μm,it indicated that suspended sediment flocculation phenomenon significantly. The in situ mean diameter of floc varied from 13.0 to 273.8 μm,the neap tidal floc was larger than spring tide. The variation of floc particle size was decreases at first,and then increases. The relationship between floc diameter and volume concentration,settling velocity were vary from case to case. The volume concentration and particle size of the floccules had positive correlation in surface and middle layer,floccules settling velocity increases with the increase of particle size in spring time. Comprehensive analysis of the factors affecting flocculation,the results show that the salinity have no significant relationship with floccules size,the influence of velocity to floccules had two kinds of circumstances,large flow motion will hinder the development of the floc size. These knowledge will contributes to a further understanding of fine sediment transport characteristics and biochemical process in the Pearl River Estuary.
- Pearl River Estuary,
- Modaomen Estuary,
- suspended sediment,
- flocculation

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References(27)

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