Study on the hydrodynamics of undular tidal bore over the uneven seabed

Li Xiaohan; Qu Ke; Yang Yuanping; Wang Xu

doi:10.12284/hyxb2023080

Volume 45 Issue 7

Jul. 2023

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Li Xiaohan，Qu Ke，Yang Yuanping, et al. Study on the hydrodynamics of undular tidal bore over the uneven seabed[J]. Haiyang Xuebao，2023, 45(7)：90–101 doi: 10.12284/hyxb2023080

Citation:

Li Xiaohan，Qu Ke，Yang Yuanping, et al. Study on the hydrodynamics of undular tidal bore over the uneven seabed[J]. Haiyang Xuebao，2023, 45(7)：90–101 doi: 10.12284/hyxb2023080

Citation:

Li Xiaohan，Qu Ke，Yang Yuanping, et al. Study on the hydrodynamics of undular tidal bore over the uneven seabed[J]. Haiyang Xuebao，2023, 45(7)：90–101 doi: 10.12284/hyxb2023080

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Study on the hydrodynamics of undular tidal bore over the uneven seabed

doi: 10.12284/hyxb2023080

Li Xiaohan^1
,,
Qu Ke^{1, 3, 4
,
,},
Yang Yuanping²,
Wang Xu¹

1.
School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410114, China
2.
Zhejiang Institute of Hydraulics & Estuary, Hangzhou 310017, China
3.
Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
4.
Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China

Received Date: 2022-05-03
Rev Recd Date: 2023-02-03

Available Online: 2023-08-03

Publish Date: 2023-07-01

Abstract

Abstract

In this study, hydrodynamic characteristics of transformation and breaking processes of the undular tidal bore on the uneven seabed have been numerically investigated by applying a nonhydrostatic numerical wave model (NHWAVE). Effects of tidal bore height, initial water depth and bed slope on the hydrodynamics of tidal bore are discussed in detail. Research findings indicates that the tidal bore height and initial water depth have significant effects on the transformation and breaking processes of the undular tidal bore on the uneven seabed. However, different bed slope on the undular tidal bore hydrodynamic characteristics of the influence of less. The existence of bed slope can lead to a significant increase in the height of the undular tidal bore, causing dramatic changes in the maximum water level along the range, and make the tidal bore propagation speed is reduced. The average speed of water depth tends to increase with the tidal bore height, as well as the height difference between the upstream and downstream tidal bore height. When increasing the water depth, the tidal difference between the upstream and downstream tidal bore height decreases, and the surface velocity decreases monotonically with the average velocity of water depth. The research findings drawn from this study can have certain reference significances for the accurate understanding of the hydrodynamics of tidal bore on the uneven seabed. It provides a scientific basis for the engineering design and safety assessment of wading buildings in the tidal river section.
- undular tidal bore,
- uneven seabed,
- nonhydrostatic wave model,
- numerical simulation

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References(33)

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