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A numerical simulation study on the response of tidal asymmetry to estuarine morphologies
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Zeng Zhou1, 2, Luying Chen3, *, Chunhai Jiang2, Ao Chu2, Townend Ian4, Changkuan Zhang2
Haiyang Xuebao | 2022, 44(7) : 37 - 46
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Haiyang Xuebao | 2022, 44(7): 37-46
• Article •
A numerical simulation study on the response of tidal asymmetry to estuarine morphologies
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Zeng Zhou1, 2, Luying Chen3, *, Chunhai Jiang2, Ao Chu2, Townend Ian4, Changkuan Zhang2
Affiliations
  • 1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
  • 2. Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, China
  • 3. Shanghai Engineering Consulting (Group) Co. Ltd., Shanghai 200335, China
  • 4. School of Ocean and Earth Science, University of Southampton, Southampton SO17 1BJ, UK
Published: 2022-07-01 doi: 10.12284/hyxb2022120
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Estuarine morphologies play an important role on tidal asymmetry. A two-dimensional numerical model is established with the Humber Estuary, UK as a reference site. A series of simulations are designed to examine the effects of the estuary cross-section shape, planform and convergence on the development of tidal asymmetry, whilst maintaining the same tidal prism. Model results show that deeper channels result in the lag and enhancement of phase difference whilst shallower channels result in a decline in the maximum ebb-tide velocity and longer period of ebb tide, and the estuary tends to be flood-dominated; narrow tidal flat tends to favour ebb dominance while broad tidal flat tends to favour flood dominance. Flood dominance is strongest in the convergent and long estuary. In addition, narrowing the estuary width will enhance the residual flow velocity of the main channel but weaken the residual flow velocity of the tidal flat. With the increase in estuary convergence, the residual flow velocity of the main channel increases but decreases on the tidal flat, and strengthen the flood dominance of the tidal flat. This paper further improves the research on the influence of estuary landforms on tidal asymmetry, which has certain guiding significance for reclamation and coastal engineering.

tidal asymmetry  /  estuarine morphology  /  stability relationships  /  tidal flats and channels  /  residual velocity  /  harmonic analysis
Zeng Zhou, Luying Chen, Chunhai Jiang, Ao Chu, Townend Ian, Changkuan Zhang. A numerical simulation study on the response of tidal asymmetry to estuarine morphologies[J]. Haiyang Xuebao, 2022 , 44 (7) : 37 -46 . DOI: 10.12284/hyxb2022120
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Article Info
doi: 10.12284/hyxb2022120
  • Receive Date：2021-08-21
  • Online Date：2026-02-01
  • Published：2022-07-01
Article Data
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History
  • Received：2021-08-21
  • Revised：2022-01-11
Funding
Affiliations
    1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
    2. Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, China
    3. Shanghai Engineering Consulting (Group) Co. Ltd., Shanghai 200335, China
    4. School of Ocean and Earth Science, University of Southampton, Southampton SO17 1BJ, UK
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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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