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Sediment resuspension of bottom boundary layer under waves and currents
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Mingzheng Wen1, 2, Tian Chen1, Yunzhuang Hu2, Yong Li2, Hongxian Shan1, 3, Yonggang Jia1, 3, *
Haiyang Xuebao | 2020, 42(3) : 97 - 106
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Haiyang Xuebao | 2020, 42(3): 97-106
• Marine Geology •
Sediment resuspension of bottom boundary layer under waves and currents
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Mingzheng Wen1, 2, Tian Chen1, Yunzhuang Hu2, Yong Li2, Hongxian Shan1, 3, Yonggang Jia1, 3, *
Affiliations
  • 1 Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China
  • 2 Tianjin Center, China Geological Survey, Tianjin 300170, China
  • 3 Function Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
Published: 2020-03-25 doi: 10.3969/j.issn.0253-4193.2020.03.009
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Resuspension and its distribution of sediment depend upon three interacting components namely the characteristics of the mobile sediment, the bed forms and the forcing hydrodynamics. A good understanding of the process of sediment resuspension is important in sediment transport. In this paper, in-situ measurements of wave, current, and suspended sediment concentration profiles in the marine ranching of Xiangyun Bay were carried out. The vertical distribution characteristics of suspended sediment in the bottom boundary layer under the wave-current action were analyzed. The results show that the resuspension of seabed sediments in the study area is controlled by storm-waves. The bottom shear stress under storm wave is 10−15 times of the critical shear stress of sediment, resuspension of sediment lags behind storm-wave for 2−3 hours. The type of vertical distribution of suspended sediment is "I" under small wave load, the vertical distribution of suspended sediment in the bottom boundary layer presents a power exponential function, which is "L" type under storm-wave. Bedforms evolved with wave and current action, and which affected the resuspension process of sediments. ${u_{*w}}{\rm{/}}{u_{*c}} = 1.00$ can be used as a criterion to distinguish the bedfroms under the dominant control of wave or current. The value of ${u_{*w}}{\rm{/}}{u_{*c}}$ under wave load is higher than that under the dominant control of wave, and the cutoff value between them increased with the increase of wave load.

bottom boundary layer  /  suspended sediment  /  waves  /  bedform  /  Xiangyun Bay
Mingzheng Wen, Tian Chen, Yunzhuang Hu, Yong Li, Hongxian Shan, Yonggang Jia. Sediment resuspension of bottom boundary layer under waves and currents[J]. Haiyang Xuebao, 2020 , 42 (3) : 97 -106 . DOI: 10.3969/j.issn.0253-4193.2020.03.009
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Year 2020 volume 42 Issue 3
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Article Info
doi: 10.3969/j.issn.0253-4193.2020.03.009
  • Receive Date：2019-01-14
  • Online Date：2026-03-26
  • Published：2020-03-25
Article Data
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History
  • Received：2019-01-14
  • Revised：2019-05-26
Funding
Affiliations
    1 Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China, Qingdao 266100, China
    2 Tianjin Center, China Geological Survey, Tianjin 300170, China
    3 Function Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266061, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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