Lateral residual circulation and sediment transport during the flood season in the Huangmaohai Estuary,Pearl River

Yang Mingming; Wu Jiaxue; Zhang Qianjiang; Ren Jie; Liu Huan

doi:10.3969/j.issn.0253-4193.2016.01.004

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Yang Mingming, Wu Jiaxue, Zhang Qianjiang, Ren Jie, Liu Huan. Lateral residual circulation and sediment transport during the flood season in the Huangmaohai Estuary,Pearl River[J]. Haiyang Xuebao, 2016, 38(1): 31-45. doi: 10.3969/j.issn.0253-4193.2016.01.004

Citation:

Yang Mingming, Wu Jiaxue, Zhang Qianjiang, Ren Jie, Liu Huan. Lateral residual circulation and sediment transport during the flood season in the Huangmaohai Estuary,Pearl River[J]. Haiyang Xuebao, 2016, 38(1): 31-45. doi: 10.3969/j.issn.0253-4193.2016.01.004

Citation:

Yang Mingming, Wu Jiaxue, Zhang Qianjiang, Ren Jie, Liu Huan. Lateral residual circulation and sediment transport during the flood season in the Huangmaohai Estuary,Pearl River[J]. Haiyang Xuebao, 2016, 38(1): 31-45. doi: 10.3969/j.issn.0253-4193.2016.01.004

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Lateral residual circulation and sediment transport during the flood season in the Huangmaohai Estuary,Pearl River

doi: 10.3969/j.issn.0253-4193.2016.01.004

1.
Center for Coastal Ocean Science and Technology, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China;Guangdong Center of Marine Development Research, Guangzhou 510220, China
2.
Center for Coastal Ocean Science and Technology, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China

Received Date: 2015-02-11
Rev Recd Date: 2015-04-13

Abstract

Abstract

Systematic observations of lateral flows and sediment transport were conducted in the 2012 flood season in a wide and shallow estuary of Huangmaohai,Pearl River. The lateral distributions of flows,salinity and sediment were identified,and the lateral dynamics and the mechanism of sediment transport were examined. Lateral flows were found to indeed occur in the estuary. A two-layer lateral residual flow developed on the west shoal and in the North Channel,a three-layer lateral residual flow developed on the top of the mouth shoal,and a lateral residual flow was directed westwards downstream of the mouth shoal. Net longitudinal sediment dispersal appeared that seaward transports occur in the deep channel,landward transports on the west shoal,and seaward transports on and downstream of the mouth shoal. Net lateral sediment transport existed that the westward transport appears on and downstream of the mouth shoal,while the westward transport occurs in the North Channel and the eastward transport on the west shoal. The reverse lateral sediment transport between the channel and the shoal resulted in the sediment convergence near the deep channel. The landward sediment fluxes on the west shoal plays an important role in the deposition of the west shoal. The mean lateral momentum balance showed that a clockwise lateral residual circulation (looking landwards) is controlled by the interaction between Coriolis effect and lateral baroclinic forcing. Lateral advection influences greatly the lateral dynamics,which has been regarded to be unimportant. The mechanism decomposition of lateral sediment fluxes over a tidal cycle showed that the lateral sediment transport is driven mainly by the Eulerian advection and tidal pumping.
- lateral residual circulation,
- sediment transport,
- momentum balance,
- wide and shallow estuary,
- Pearl River,
- Huangmaohai Estuary

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