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Flume Experiment Investigation on Propagation Characteristics of Tidal Bore in A Curved Channel

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Abstract

Tidal bore is a special and intensive form of flow movement induced by tidal effect in estuary areas, which has complex characteristics of profile, propagation and flow velocity. Although it has been widely studied for the generation mechanism, propagation features and influencing factors, the curved channel will complicate the characteristics of tidal bore propagation, which need further investigation compared with straight channel. In this study, the flume experiments for both undular and breaking bores’ propagation in curved channel are performed to measure the free-surface elevation and flow velocity by ultrasonic sensors and ADV respectively. The propagation characteristics, including tidal bore height, cross-section surface gradient, tidal bore propagation celerity, and flow velocity are obtained for both sides of the curved channel. And three bore intensities are set for each type of tidal bores. The free-surface gradients are consistently enlarged in high-curvature section for undular and breaking bores, but have distinct behaviors in low-curvature section. The spatial distributions of tidal bore propagation celerity and flow velocity are compared between concave and convex banks. This work will provide experimental reference for engineering design of beach and seawall protection, erosion reduction and siltation promotion in estuary areas with the existence of tidal bores.

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Funding

This research was supported by the National Key Research and Development Program of China (Grant No. 2022YFE0104500), the National Natural Science Foundation of China (Grant No. 52271271), the Fundamental Research Funds for the Central Universities (Grant No. B220202080), the National Natural Science Foundation of China (Grant No. 41906183), and the National Natural Science Foundation of China (Grant No. 52101308).

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Authors and Affiliations

  1. Key Laboratory of Ministry of Education for Coastal Disaster and Protection, Hohai University, Nanjing, 210098, China

    Jun Fan & Ai-feng Tao

  2. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing, 210098, China

    Jun Fan & Ai-feng Tao

  3. The Adminstrative Committee of Nantong Haimen Sanchang Industrial Park, Nantong, 226121, China

    Mo-quan Shi

  4. Zhejiang University of Water Resources and Electric Power, Hangzhou, 310018, China

    Ying Li

  5. China Renewable Energy Engineering Institute, Beijing, 100120, China

    Ji Peng

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  1. Jun Fan
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  2. Ai-feng Tao
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  5. Ji Peng
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Correspondence to Ai-feng Tao.

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Fan, J., Tao, Af., Shi, Mq. et al. Flume Experiment Investigation on Propagation Characteristics of Tidal Bore in A Curved Channel. China Ocean Eng 37, 131–144 (2023). https://doi.org/10.1007/s13344-023-0011-9

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  • DOI: https://doi.org/10.1007/s13344-023-0011-9

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