珠江黄茅海河口洪季侧向余环流与泥沙输移

杨名名; 吴加学; 张乾江; 任杰; 刘欢

doi:10.3969/j.issn.0253-4193.2016.01.004

珠江黄茅海河口洪季侧向余环流与泥沙输移

doi: 10.3969/j.issn.0253-4193.2016.01.004

1.
中山大学海洋学院近岸海洋科学与技术研究中心, 广东广州 510275;广东省海洋发展规划研究中心, 广东广州 510220
2.
中山大学海洋学院近岸海洋科学与技术研究中心, 广东广州 510275

基金项目: 国家重大科学研究计划(2013CB956502);国家自然科学基金项目(41276079,41176067)。

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出版历程
- 收稿日期: 2015-02-11
- 修回日期: 2015-04-13

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

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

摘要

摘要: 2012年洪季对珠江黄茅海河口湾侧向动力结构与泥沙输移过程进行了系统观测,采用动量平衡和泥沙通量机制分解等方法,分析了河口流、温盐和泥沙侧向分布特征以及泥沙输移过程,探讨了侧向动量平衡与泥沙输移机制。洪季黄茅海河口存在明显的侧向流,西滩和北槽均形成表层向东、底层向西的两层侧向流,拦门沙滩顶呈现表、底层向西、中层向东的三层侧向流,而拦门沙前缘侧向流整体向西。河口湾纵向净泥沙通量表现为北槽向海、西滩向陆,拦门沙滩顶及其前缘均向海;侧向净泥沙通量表现为滩顶及其前缘均向西,西滩向东、北槽向西。这种侧向泥沙辐聚过程是高浓度悬沙聚集于滩槽界面的重要原因,向陆净通量是西滩回淤的重要原因。滩槽间侧向余环流动量平衡主要是侧向斜压梯度力、科氏力和侧向平流作用。欧拉平流输运在侧向泥沙输运中起主要作用,潮泵效应也起重要作用。
- 侧向环流 /
- 泥沙输移 /
- 动量平衡 /
- 宽浅河口 /
- 珠江 /
- 黄茅海河口
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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参考文献(52)

Valle-Levinson A,Wong K C,Lwiza K M M. Fortnightly variability in the transverse dynamics of a coastal plain estuary[J]. Journal of Geophysical Research,2000,105(C2): 3413-3424.

Lacy J R,Monismith S G. Secondary currents in a curved,stratified,estuarine channel[J]. Journal of Geophysical Research,2001,106(C12): 31283-31302.

Cáceres M,Valle-Levinson A,Sepúlveda H H,et al. Transverse variability of flow and density in a Chilean fjord[J]. Continental Shelf Research,2002,22(11/13): 1683-1698.

Codiga D L,Aurin D A. Residual circulation in eastern Long Island Sound: observed transverse-vertical structure and exchange transport[J]. Continental Shelf Research,2006,27(1): 103-116.

Valle-Levinson A,de Velasco G G,Trasviña A,et al. Residual exchange flows in subtropical estuaries[J]. Estuaries and Coasts,2009,32(1): 54-67.

Gong W P,Jia L W,Shen J,et al. Sediment transport in response to changes in river discharge and tidal mixing in a funnel-shaped micro-tidal estuary[J]. Continental Shelf Research,2014,76(2): 89-107.

Geyer W R,Signell R P,Kineke G C. Lateral trapping of sediment in a partially mixed estuary[M]// Dronkers J,Scheffers M B A M. Physics of Estuaries and Coastal Seas,PECS 1996. Rotterdam: Balkema Press,1998: 115-124.

Geyer W R,Woodruff J D,Traykovski P. Sediment transport and trapping in the Hudson river estuary[J]. Estuaries,2001,24(5): 670-679.

Woodruff J D,Geyer W R,Sommerfield C K,et al. Seasonal variation of sediment deposition in the Hudson River estuary[J]. Marine Geology,2001,179(1/2): 105-119.

Fugate D C,Friedrichs C T, Sanford L P. Lateral dynamics and associated transport of sediment in the upper reaches of a partially mixed estuary,Chesapeake Bay,USA[J]. Continental Shelf Research,2007,27(5): 679-698.

Kim Y H,Voulgaris G. Lateral circulation and suspended sediment transport in a curved estuarine channel: Winyah Bay,SC,USA[J]. Journal of Geophysical Research,2008,113 (C9),doi: 10.1029/2007JC004509.

Fischer H B. Mass transport mechanisms in partially stratified estuaries[J]. Journal of Fluid Mechanisms,1972,53(4): 671-687.

Dyer K R. The salt balance in stratified estuaries[J]. Estuarine Coastal Marine Science,1974,2(3): 273-281.

Kjerfve B,Proehl J A. Velocity variability in a cross-section of a well-mixed estuary[J]. Journal of Marine Research,1979,37(3): 409-418.

Wong K C. On the nature of transverse variability in a coastal plain estuary[J]. Journal of Geophysical Research,1994,99(C7): 14209-14222.

Li C Y,O'Donnell J. Tidally driven residual circulation in shallow estuaries with lateral depth variation[J]. Journal of Geophysical Research,1997,102(C13): 27915-27929.

Valle-Levinson A,Li C Y,Wong K C,et al. Convergence of lateral flow along a coastal plain estuary[J]. Journal of Geophysical Research,2000,105(C7): 17045-17061.

Liu G F,Zhu J R,Wang Y Y,et al. Tripod measured residual currents and sediment flux: impacts on the silting of the Deepwater Navigation Channel in the Changjiang Estuary[J]. Estuarine,Coastal and Shelf Science,2011,93(3): 192-201.

Ralston D K,Geyer W R,Warner J C. Bathymetric controls on sediment transport in the Hudson River estuary: lateral asymmetry and frontal trapping[J]. Journal of Geophysical Research,2012,117(C10): C10013.

Nichols M M,Poor G. Sediment transport in a coastal plain estuary[J]. Journal of the Waterways and Harbors Division,1967,93(4): 83-96.

Nichols M M. Sediments of the James River estuary,Virginia[J]. Geological Society of America Memoirs,1972,133: 169-212.

Panuzio F L. Lower Hudson River siltation[C]//Proceedings of the 2nd Federal Interagency Sedimentation Conference. Washington D C: U S Dep of Agric,1965: 512-550.

Scully M E,Friedrichs C T. Sediment pumping by tidal asymmetry in a partially mixed estuary[J]. Journal of Geophysical Research,2007,112(C7): C07028.

Stacey M T,Burau J R,Monismith S G. Creation of residual flows in a partially stratified estuary[J]. Journal of Geophysical Research,2001,106(C8): 17013-17037.

Dyer K R. Lateral circulation effects in estuaries[M]// Estuaries,Geophysics and the Environment. Washington D C: National Academy of Sciences,1977: 22-29.

Huijts K M H,Schuttelaars H M,de Swart H E,et al. Lateral entrapment of sediment in tidal estuaries: an idealized model study[J]. Journal of Geophysical Research,2006,111(C12): C12016.

Chen S N,Sanford L P. Lateral circulation driven by boundary mixing and the associated transport of sediments in idealized partially mixed estuaries[J]. Continental Shelf Research,2009,29(1): 101-118.

Chen S N,Sanford L P,Ralston D K. Lateral circulation and sediment transport driven by axial winds in an idealized,partially mixed estuary[J]. Journal of Geophysical Research,2009,114(C12): C12006.

Schramkowski G P,de Swart H E,Schuttelaars H M. Effect of bottom stress formulation on modelled flow and turbidity maxima in cross-sections of tide-dominated estuaries[J]. Ocean Dynamics,2010,60(2): 205-218.

吴超羽. 黄茅海河口小尺度动力结构及其沉积作用[J]. 中山大学学报(自然科学版),1995,34(2): 86-94. Wu Chaoyu. Dynamic structures and their sedimentation effects in Huangmaohai Estuary[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni,1995,34(2): 86-94.

赵焕庭. 珠江河口演变[M]. 北京: 海洋出版社,1990: 357. Zhao Huanting. Evolutional Processes of the Pearl River Estuary[M]. Beijing: China Ocean Press,1990: 357.

李瑞杰,王昌杰,邵宇阳,等. 珠江口崖门出海航道回淤分析[J]. 中国港湾建设,2005(2): 5-7. Li Ruijie,Wang Changjie,Shao Yuyang,et al. Research on sediment deposition in Yamen Waterway[J]. China Harbour Engineering,2005(2): 5-7.

Wu J X,Shen H T. Estuarine bottom sediment transport based on the 'McLaren Model': A case study of Huangmaohai Estuary,South China[J]. Estuarine,Coastal and Shelf Science,1999,49(2): 265-279.

Liu H,Wu C Y,Xu W M,et al. Contrasts between estuarine and river systems in near-bed turbulent flows in the Zhujiang (Pearl River) Estuary,China[J]. Estuarine,Coastal and Shelf Science,2009,83(4): 591-601.

Wu J X,Liu H,Ren J,et al. Cyclonic spirals in tidally accelerating bottom boundary layers in the Zhujiang (Pearl River) Estuary[J]. Journal of Physical Oceanography,2011,41(6): 1209-1226.

Swift M R,Fredriksson D W,Celikkol B. Structure of an axial convergence zone from acoustic Doppler current profiler measurements[J]. Estuarine,Coastal and Shelf Science,1996,43(1): 109-122.

Cáceres M,Valle-Levinson A,Atkinson L. Observations of cross-channel structure of flow in an energetic tidal channel[J]. Journal of Geophysical Research,2003,108(C4): 3114.

Buijsman M C,Ridderinkhof H. Variability of secondary currents in a weakly stratified tidal inlet with low curvature[J]. Continental Shelf Research,2008,28(14): 1711-1723.

Collignon A G,Stacey M T. Intratidal dynamics of fronts and lateral circulation at the shoal-channel interface in a partially stratified estuary[J]. Journal of Physical Oceanography,2012,42(5): 869-883.

鲁远征,吴加学,刘欢. 河口底边界层湍流观测后处理技术方法分析[J]. 海洋学报,2012,34(5): 39-49. Lu Yuanzheng,Wu Jiaxue,Liu Huan. An integrated post-processing technique for turbulent flows in estuarine bottom boundary layer[J]. Haiyang Xuebao,2012,34(5): 39-49.

邓伟铸,吴加学,刘欢,等. 基于ADV声学泥沙反演与扩散机制分析[J]. 海洋学报,2014,36(7): 57-69. Deng Weizhu,Wu Jiaxue,Liu Huan,et al. ADV-based acoustical sediment inversion and diffusion mechanism in the Pearl River Estuary[J]. Haiyang Xuebao,2014,36(7): 57-69.

Nidzieko N J,Hench J L,Monismith S G. Lateral circulation in well-mixed and stratified estuarine flows with curvature[J]. Journal of Physical Oceanography,2009,39(4): 831-851.

Kalkwijk J P T,Booij R. Adaptation of secondary flow in nearly-horizontal flow[J]. Journal of Hydraulic Research,1986,24(1): 19-37.

Lacy J R,Stacey M T,Burau J R,et al. Interaction of lateral baroclinic forcing and turbulence in an estuary[J]. Journal of Geophysical Research,2003,108(C3): 3089.

Uncles R J,Elliortt R C A,Weston S A. Observed fluxes of water,salt and suspended sediment in a partly mixed estuary[J]. Estuarine,Coastal and Shelf Science,1985,20(2): 147-167.

陈子燊. 珠江伶仃河口湾及邻近内陆架的纵向环流与物质输运分析[J]. 热带海洋,1993,12(4): 47-54. Chen Zishen. Analysis on longitudinal net circulations and material fluxes in Lingding Estuary,Pearl River and adjacent inner shelf waters[J]. Tropic Oceanology,1993,12(4): 47-54.

任杰,包芸,林卫强. 珠江口伶仃洋水沙纵向输移特征分析[J]. 热带海洋学报,2001,20(3): 35-40. Ren Jie,Bao Yun,Lin Weiqiang. Analyses on water and suspended sediment fluxes in Lingdingyang Estuary of Zhujiang River Mouth[J]. Journal of Tropical Oceanography,2001,20(3): 35-40.

Wu J X,Shen H T,Xiao C Y. Sediment classification and estimation of suspended sediment fluxes in the Changjiang Estuary,China[J]. Water Resources Research,2001,37(7): 1969-1979.

Scully M E,Geyer W R. The role of advection,straining,and mixing on the tidal variability of estuarine stratification[J]. Journal of Physical Oceanography,2012,42(5): 855-868.

Lerczak J A,Geyer W R. Modeling the lateral circulation in straight,stratified estuaries[J]. Journal of Physical Oceanography,2004,34(6): 1410-1428.

Sanford L P,Sellner K G,Breitburg D L. Covariability of dissolved oxygen with physical processes in the summertime Chesapeake Bay[J]. Journal of Marine Research,1990,48(3): 567-590.

Kim S C,Friedrichs C T,Maa J P,et al. Estimating bottom stress in tidal boundary layer from acoustic Doppler velocimeter data[J]. Journal of Hydraulic Engineering,2000,126(6): 399-406.

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