Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait

JIANG Dong hui; GAO Shu

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Article Navigation > Acta Sedimentologica Sinica > 2002 > 20(4): 663-667

JIANG Dong hui, GAO Shu. Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait[J]. Acta Sedimentologica Sinica, 2002, 20(4): 663-667.

Citation:

JIANG Dong hui, GAO Shu. Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait[J]. Acta Sedimentologica Sinica, 2002, 20(4): 663-667.

Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait

JIANG Dong hui^1,2,
GAO Shu²

1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071;
2 Ministry of Education Key Laboratory for Coast and Island Development,Nanjing University, Nanjing 210093

Received Date: 2001-10-29
Rev Recd Date: 2002-05-18

Abstract

A 2-D ho rizontal numerical model is used to simulate maximum and mean tidally-induce near-bed shear stresses and the corresponding mobile layer thicknesses in the Bohai Strai t region.At the same t ime, the cri tical near-bed shear st ress was calculated using the g rain size parameters.An analysis of the results show s that :(1)the seabed sediment types are related to the dif ference between the t idally-induced shear stress and the cri tical shear stress (a larger difference is associated w ith a coarser bed material);(2)in some places (e.g.the northeastern part of the Strait and the near-sho re areas of the northern Shandong Peninsula)the tidally-induced shear st ress is smaller than the critical shear st ress, but the seabed sediment is relatively coarse, indicating that the sediment may represent relict materials (this hypothesis should be tested by the result s f rom future investig at ions into the Holocene sea level changes, paleo-hydrody namic conditions and the evolution of the sedimentary environment);and (3)a good correlation betw een the mobile layer thickness and the sediment type exists, i.e., a large mobile layer thickness is associated with relatively coarse sediments, and a small thickness is associated with fine-grained sediments.
- tidally-induced near-bed shear stress,
- thickness of mobile layer,
- distribution of surficial sediments,
- numerical modelling,
- Bohai Strait

References

[1]	Shepard F P. Submarine Geology (2nd edition)[M]. New York:Harper and Row, 1963.557
[2]	Emery K O. Relict sediments on continental shelves of the world[J]. Bulletin of the American Association of Petroleum Geologists, 1968, 52: 445～464
[3]	Swift D J P, Stanley D J, Curray J R. Relict sediments on continental shelves: a reconsideration[J]. Journal of Geology, 1971,79:322～346
[4]	Allen G P. Relationship between grain size parameter distribution and current patterns in the Gironde Estuary (France)[J]. Journal of Sedimentary Petrology, 1971,41:74～88
[5]	Grochowski N T L. Collins M B, Boxall S R. Salomon J-C. Sediment transport predictions for the English Channel, using numerical models[J]. Journal of the Geological Society (London), 1993,150:683～695
[6]	许卫忆, 苏纪兰. 杭州湾二维潮波计算及底质分布的动力成因[J]. 海洋学报,1986,17: 493～503[Xu Wei,Su Jilan.Calculation of two-dimensional tide wave and dynamic formation of surficial sediments's distribution within Hanzhou Bay[J].Acta Oceanologica Sinica,1986,17:493～503]
[7]	董礼先, 苏纪兰, 王康. 黄渤海潮流场及其与沉积物搬运的关系[J]. 海洋学报, 1989,11(1): 102～114[Dong Lixian,Su Jianlan,Wang Kangshan.Tidal current field and it's effection on sediment transport within Yellow sea and Bohai sea[J].Acta Oceanologica Sinica,1989,11(1):102～114]
[8]	赵保仁,庄国文,曹德明,雷方辉. 渤海的环流、潮余流及其对沉积物分布的影响[J].海洋与湖沼,1995, 26(5): 466～472[Zhao Baoren,Zhuang Guowen,Cao Deming, et al.Circulation,tidal residual currents and their effects on the sedimentations in the Bohai sea[J].Oceanologia Ei Limnologia Sinica,1995,26(5):466～472]
[9]	Dronkers J, Miltenburg A G. Fine sediment deposits in shelf seas[J]. Journal of Marine System,1996,7: 119～131
[10]	刘振夏. 黄海表层沉积物的分布规律[J]. 海洋通报,1982,1(1):43～51[Liu Zhenxia.Distribution patterns of surficial sediments in Yellow sea[J].Marine Science Bulletin,1982,1(1):43～51]
[11]	尹延鸿,周青伟. 渤海东部地区沉积物类型特征及分布规律[J]. 海洋地质与第四纪地质,1994,14(2):47～54[Yin Yanhong,Zhou Qingwei.Characteristics and distribution of sediment types in eastern Bohai sea[J].Marine Geology & Quaternary Geoloy,1994,14(2):47～54]
[12]	蒋东辉,高抒,程鹏. 渤海海峡沉积物输运的数值模拟[J]. 海洋与湖沼,2002,33(5):553～561[Jiang Donghui,Gao Shu,Cheng Peng.Modelling sediment transport in the Bohai Strait[J].Oceanologia Et Limnologia Sinica,2002,33(5):553～561]
[13]	Fang G, Ichiye T. On the vertical structure of tidal currents in a homogeneous sea[J]. Geophysical Journal of the Royal Astronomical Society, 1983,73(1): 65～82
[14]	Dyer K R. Coastal and estuarine sediment dynamics[M]. New York:John Wiley, 1986
[15]	Rahuel J L, Holly Chollet, Belleudy J P, Yang G. Modeling of Riverbed evolution for bedload sediment mixture[J]. J. Hydraulic Engineering,1989, 115: 1 521～1 542
[16]	Niekerk A V, Voegel K R, Slingerland R L, Brige J S. Routing of heterogeneous sediment over movement bed: Model Development[J]. J. Hydraulic Engineering, 1992,118: 246～262
[17]	秦蕴珊,赵一阳等主编. 渤海地质[M]. 北京:科学出版社, 1985[Qin Yunshan,Zhao Yiyang,Chen Lirong,Zhao Songling.Geology of Bohai Sea[M].Beijing:China Ocean Press,1990.98～105]
[18]	Liu J P, Milliman J D, Gao S. The Shandong mud wedge and post-glacial sediment accumulation in the Yellow Sea[J]. Geo-Marine Letters, 2002,21: 212～218
[19]	程鹏, 高抒. 北黄海西部海底沉积物粒度特征和净输运趋势[J]. 海洋与湖沼, 2000, 31(6):604～615[Cheng Peng,Gao Shu.Net sediment transport patterns over the northwestern Yellow sea,based upon grain size trend analysis[J].Oceanologia Et Limnologia Sinica,2000,31(6):604～615]

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Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait

1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao Shandong 266071;

2 Ministry of Education Key Laboratory for Coast and Island Development,Nanjing University, Nanjing 210093

Received Date: 2001-10-29

Rev Recd Date: 2002-05-18

Key words:

Abstract: A 2-D ho rizontal numerical model is used to simulate maximum and mean tidally-induce near-bed shear stresses and the corresponding mobile layer thicknesses in the Bohai Strai t region.At the same t ime, the cri tical near-bed shear st ress was calculated using the g rain size parameters.An analysis of the results show s that :(1)the seabed sediment types are related to the dif ference between the t idally-induced shear stress and the cri tical shear stress (a larger difference is associated w ith a coarser bed material);(2)in some places (e.g.the northeastern part of the Strait and the near-sho re areas of the northern Shandong Peninsula)the tidally-induced shear st ress is smaller than the critical shear st ress, but the seabed sediment is relatively coarse, indicating that the sediment may represent relict materials (this hypothesis should be tested by the result s f rom future investig at ions into the Holocene sea level changes, paleo-hydrody namic conditions and the evolution of the sedimentary environment);and (3)a good correlation betw een the mobile layer thickness and the sediment type exists, i.e., a large mobile layer thickness is associated with relatively coarse sediments, and a small thickness is associated with fine-grained sediments.

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Reference (19)

[1]	Shepard F P. Submarine Geology (2nd edition)[M]. New York:Harper and Row, 1963.557
[2]	Emery K O. Relict sediments on continental shelves of the world[J]. Bulletin of the American Association of Petroleum Geologists, 1968, 52: 445～464
[3]	Swift D J P, Stanley D J, Curray J R. Relict sediments on continental shelves: a reconsideration[J]. Journal of Geology, 1971,79:322～346
[4]	Allen G P. Relationship between grain size parameter distribution and current patterns in the Gironde Estuary (France)[J]. Journal of Sedimentary Petrology, 1971,41:74～88
[5]	Grochowski N T L. Collins M B, Boxall S R. Salomon J-C. Sediment transport predictions for the English Channel, using numerical models[J]. Journal of the Geological Society (London), 1993,150:683～695
[6]	许卫忆, 苏纪兰. 杭州湾二维潮波计算及底质分布的动力成因[J]. 海洋学报,1986,17: 493～503[Xu Wei,Su Jilan.Calculation of two-dimensional tide wave and dynamic formation of surficial sediments's distribution within Hanzhou Bay[J].Acta Oceanologica Sinica,1986,17:493～503]
[7]	董礼先, 苏纪兰, 王康. 黄渤海潮流场及其与沉积物搬运的关系[J]. 海洋学报, 1989,11(1): 102～114[Dong Lixian,Su Jianlan,Wang Kangshan.Tidal current field and it's effection on sediment transport within Yellow sea and Bohai sea[J].Acta Oceanologica Sinica,1989,11(1):102～114]
[8]	赵保仁,庄国文,曹德明,雷方辉. 渤海的环流、潮余流及其对沉积物分布的影响[J].海洋与湖沼,1995, 26(5): 466～472[Zhao Baoren,Zhuang Guowen,Cao Deming, et al.Circulation,tidal residual currents and their effects on the sedimentations in the Bohai sea[J].Oceanologia Ei Limnologia Sinica,1995,26(5):466～472]
[9]	Dronkers J, Miltenburg A G. Fine sediment deposits in shelf seas[J]. Journal of Marine System,1996,7: 119～131
[10]	刘振夏. 黄海表层沉积物的分布规律[J]. 海洋通报,1982,1(1):43～51[Liu Zhenxia.Distribution patterns of surficial sediments in Yellow sea[J].Marine Science Bulletin,1982,1(1):43～51]
[11]	尹延鸿,周青伟. 渤海东部地区沉积物类型特征及分布规律[J]. 海洋地质与第四纪地质,1994,14(2):47～54[Yin Yanhong,Zhou Qingwei.Characteristics and distribution of sediment types in eastern Bohai sea[J].Marine Geology & Quaternary Geoloy,1994,14(2):47～54]
[12]	蒋东辉,高抒,程鹏. 渤海海峡沉积物输运的数值模拟[J]. 海洋与湖沼,2002,33(5):553～561[Jiang Donghui,Gao Shu,Cheng Peng.Modelling sediment transport in the Bohai Strait[J].Oceanologia Et Limnologia Sinica,2002,33(5):553～561]
[13]	Fang G, Ichiye T. On the vertical structure of tidal currents in a homogeneous sea[J]. Geophysical Journal of the Royal Astronomical Society, 1983,73(1): 65～82
[14]	Dyer K R. Coastal and estuarine sediment dynamics[M]. New York:John Wiley, 1986
[15]	Rahuel J L, Holly Chollet, Belleudy J P, Yang G. Modeling of Riverbed evolution for bedload sediment mixture[J]. J. Hydraulic Engineering,1989, 115: 1 521～1 542
[16]	Niekerk A V, Voegel K R, Slingerland R L, Brige J S. Routing of heterogeneous sediment over movement bed: Model Development[J]. J. Hydraulic Engineering, 1992,118: 246～262
[17]	秦蕴珊,赵一阳等主编. 渤海地质[M]. 北京:科学出版社, 1985[Qin Yunshan,Zhao Yiyang,Chen Lirong,Zhao Songling.Geology of Bohai Sea[M].Beijing:China Ocean Press,1990.98～105]
[18]	Liu J P, Milliman J D, Gao S. The Shandong mud wedge and post-glacial sediment accumulation in the Yellow Sea[J]. Geo-Marine Letters, 2002,21: 212～218
[19]	程鹏, 高抒. 北黄海西部海底沉积物粒度特征和净输运趋势[J]. 海洋与湖沼, 2000, 31(6):604～615[Cheng Peng,Gao Shu.Net sediment transport patterns over the northwestern Yellow sea,based upon grain size trend analysis[J].Oceanologia Et Limnologia Sinica,2000,31(6):604～615]

Relationship between the Tidally-induced Near-bed Shear Stress and the Distribution of Surficial Sediments in the Bohai Strait

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