The suspended sediment transport associated with low flow patterns in shallow waters: a case study from the Tianjin subtidal area

DU Jiabi; PEI Yandong; GAO Jianhua; YU Xin; WANG Fu; FAN Changfu; WANG Hong; WANG Yaping

Article Contents

Article Navigation > Haiyang Xuebao > 2012 > 34(1): 136-144

DU Jiabi, PEI Yandong, GAO Jianhua, YU Xin, WANG Fu, FAN Changfu, WANG Hong, WANG Yaping. The suspended sediment transport associated with low flow patterns in shallow waters: a case study from the Tianjin subtidal area[J]. Haiyang Xuebao, 2012, 34(1): 136-144.

Citation:

PDF( 1203 KB)

The suspended sediment transport associated with low flow patterns in shallow waters: a case study from the Tianjin subtidal area

1.
Key Laboratory of Ministry of Education for Coast and Island Development, Nanjing University, Nanjing 210093, China
2.
Geological Survey Centre, of Tianjin China Geological Survey Bureau, Tianjin 300170, China

Received Date: 2010-12-02
Rev Recd Date: 2011-04-18

Abstract

Abstract

The suspended sediment transport processes were analyzed on the basis of hydrodynamics and suspended sediment survey in the Tianjin subtidal waters of the Bohai Sea. The flow in the study area was characterized by the irregular semidiurnal tide and reciprocating flow. The current speed of flood was stronger than ebb.There is a significant linear relationship between the depth-averaged velocity and the suspended sediment concentration at the bottom layer during the flood period but not during the ebb, which indicates a strong resuspension event during the flood. The suspended sediment transported with strong asymmetric characteristics during tidal cycles, which results in the net sediment transportation onshore. The calculation of flux decomposition shows that the tidal pumping effect, especially the tidal trapping, is the main contribution in terms of the suspended sediment transport in the study area. It is followed by the Lagrangian advection transport, which as one order lower than the tidal pumping; the vertical shear contribution is minimum. In conclusion, the strong asymmetry of both the current velocity and suspended sediment concentration during the flood and ebb, were the main factor resulting in a strong tidal trapping. In addition, the suspended sediment transport patterns in the subtidal area may be related to the fine-grained sediment trapping over the intertidal area.
- tidal pumping,
- resuspension,
- current velocity asymmetry,
- flux decomposition

FullText(HTML)

References(48)

References

王颖,朱大奎.中国的潮滩[J].第四纪研究,1990(4):291-300.

李从先,李萍.淤泥质海岸的沉积和砂体[J].海洋与湖沼,1982,13(1):48-59.

WANG Y. The mudflat coast of China[J].Canadian Journal of Fisheries and Aquatic Sciences, 1983, 40(1): 160-171.

任美锷.中国淤泥质潮滩沉积研究的若干问题[J].热带海洋,1985,4(2):6-14.

陈德昌,金镠,唐寅德,等.连云港地区淤泥质海岸近岸带水体含沙量的横向分布[J].海洋与湖沼,1989,20(6):544-553.

张忍顺.江苏省淤泥质潮滩的潮流特征及悬移质沉积过程[J].海洋与湖沼,1986,17(3):235-245.

陈卫跃.潮滩泥沙输移及趁机动力环境——以杭州湾北岸、长江口南岸部分潮滩为例[J].海洋学报,1992,13(6):813-821.

汪亚平,高建华,潘少明.长江河口区边界层参数的观测与分析[J].海洋地质动态,2006,22(7):16-21.

徐元,王宝灿,章可奇.上海淤泥质潮滩潮锋作用及其形成机制初步探讨[J].地理研究,1994,13(3):60-68.

许婷,孙连成.天津港外航道水动力条件及工程泥沙淤积研究[J].中国港湾建设,2008, (1):26-30.

康慧,李建芬,钟新宝.渤海湾西岸泥质海岸带现代地质环境变化的遥感监测[G]//天津地质矿产研究所.前寒武纪第四纪地质文集.北京:地质出版社,2002:205-213.

施建堂.渤海湾西部的现代沉积[J].海洋通报,1987,6(1):22-26.

雷坤,孟伟,郑丙辉,等.渤海湾西岸潮间带沉积物粒度分布特征[J].海洋通报,2006,15(1):54-61.

杨作升,孙宝喜,沈渭铨.黄河口毗邻海域细粒级沉积物特征及沉积物入海后的运移[J].山东海洋学院学报,1985(2):121-129.

赵保仁,庄国文,曹德明,等.渤海的环境、潮余流及其对沉积物分布的影响[J].海洋与湖沼,1995,26(5):466-473.

刘兴泉,缪经榜,季仲贞.渤海冬季环流的数值研究[J].大气科学,1989,13(3):280-288.

孙连成.渤海湾西部海域波浪特征分析[J].黄渤海海洋,1991,9(3):50-58.

孙连成.天津港水文泥沙问题研究综述[J].海洋工程,2003,21(1):78-86.

EMIL V S, DOBRYNIN Mikhail, PLESKACHEVSKY Andrey, et al. Bed shear stress in the southern North Sea as an important driver for suspended sediment dynamics[J]. Ocean Dynamics, 2009, 59(2): 183-194.

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

POPE N D, WIDDOWS J, BRINSLEY M D. Estimation of bed shear stress using the turbulent kinetic energy approach-a comparison of annular flume and field data[J]. Continental Shelf Research, 2006, 26(8): 959-970.

SOULSBY R L, DYER K R. The form of the near-bed velocity profile in a tidally accelerating flow[J]. Journal of Geophysical Research, 1986, 86(C9): 8067-8074.

KABIR M R, TORFS, H. Comparison of different methods to calculate bed shear stress[J]. Water Science and Technology, 1992, 25(8): 131-140.

BIRON P M, LANE S N, ANDRÉ G R, et al. Sensitivity of bed shear stress estimated from vertical velocity profiles: the problem of sampling resolution[J]. Earth Surface Processes and Landforms, 1998,23 (2): 133-139.

汪亚平,高抒,贾建军.海底边界层水流结构及底移质搬运研究进展[J].海洋地质与第四纪地质,2000,20(3):101-106.

李占海,高抒,柯贤坤,等.江苏大丰潮间带粉砂滩的潮流边界层特征[J].海洋通报,2003,22(20):1-8.

BOWDEN K F. The mixing processes in tidal estuary[J]. International Journal of Air and Water Pollution,1963,7(4-5):343-356.

HANSEN D V. Salt balance and circulation in partially mixed estuaries[J]. American Association for the Advancement of Science,Washington D C, Estuaries. 1967, 83: 45-51.

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

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

DYER K R. Fine sediment particle transport in estuaries[M]// DRONKERS J, LEUSSEN W V. Physical Processes in Estuary. NewYork: Springer-Verlag, 1988: 295-310.

沈健,沈焕庭,潘定安,等.长江河口最大浑浊带水沙输运机制分析[J].地理学报,1995,50(5):411-420.

刘高峰,朱建荣,沈焕庭,等.河口涨落潮槽水沙输运机制研究[J].泥沙研究,2005(5):51-57.

高建华,高抒,董礼先,等.长江河口地区沉积物特征及悬沙输运[J].海洋通报,2003,22(5):6-33.

肖莞生,陈子燊.珠江河口区枯季咸潮入侵与盐度输运机理分析[J].水文,2010,30(3):10-15.

DYER K R. Estuaries-A Physical Introduction[M]. New York: John Wiley and Sons, 1997.

MAA J P Y, LEE C H. Variation of the resuspension coefficients in the lower Chesapeake Bay[J]. Journal of Coastal Research, 1997, 25: 63-74.

HOUWING E J. Estuarine, determination of the critical erosion threshold of cohesive sediments on intertidal mudflats along the Dutch Wadden Sea coast[J]. Estrarine, Coastal and Shelf Science, 1999, 49(4):545-555.

时钟.河口海岸底部边界层和细颗粒泥沙过程[J].海洋科学,2000,24(11):26-30.

徐宏明,张庆河.粉砂质海岸泥沙特性实验研究[J].泥沙研究,2000,3(3):42-49.

张文祥,杨世伦.OBS浊度标定与悬沙浓度误差分析[J].海洋技术,2008,27(4):5-8.

张宗德,徐还.关于光电测沙仪实用性问题的探讨[J].水科学进展,1995,6(增刊):69-74.

董景岗,王海霞,李伟.天津近岸海水悬浮物的分布特征[J].盐业与化工,2008,37(6):42-46.

董年虎,王广月.渤海湾黄河入海口区余流特征性分析[J].黄渤海海洋,1997,15(1):64-69.

吴祥柏,汪亚平,潘少明.长江河口悬沙与盐分输运机制分析[J].海洋学研究,2008,26(4):8-19.

POSTMA H. Transport and accumulation of suspended matter in the Dutch Wadden Sea[J]. Journal of Sea Research, 1961, 1(1/2): 148-190.

VAN STRAATEN Kuenen. Tidal action as a cause for clay accumulation[J]. Journal of Sedimentary Research, 1958, 28(4):406-413.

WANG Y P, GAO S, JIA J, et al. Sediment transport over an accretional intertidal flat with influences of reclamation, Jiangsu coast, China[J]. Marine Geology, 2011,4(1):1-15. Doi: 10.1016/j.margeo.2011.01.004.

Relative Articles

Supplements(0)

Cited By

Proportional views