Qiantang River tidal bore at Laoyanchang on 23 October 2024

The Qiantang River is affected by a large tidal bore, developing from the Hangzhou Bay and propagating upstream for more than 100 km.
On 23 October 2024, the propagation of the tidal bore was observed at Laoyanchang. The approaching bore extend over nearly 2.2 km and is subjected to a relatively sharp turn to the left as it propagates upstream. At the outer bend, an embankment structure was built to reflect safely the bore.
This video shows the approaching bore and its reflection on the Laoyanchang embankment dam.
Acknowledgements
Prof. Dongzi PAN (ZIHE)
Zheijiang Institute of Hydraulics and Estuaries
References
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DAI, Z. and ZHOU, C. (1987). "The Qiantang bore." International Journal of Sediment Research, Vol. 1, pp. 21-26.
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REUNGOAT, D., LUBIN, P., LENG, X., and CHANSON, H. (2018). "Tidal Bore Hydrodynamics and Sediment Processes: 2010-2016 Field Observations in France." Coastal Engineering Journal, Vol. 60, No. 4, pp. 484-498 (DOI: 10.1080/21664250.2018.1529265) (ISSN 0578-5634).
/ @hubert_chanson
Keywords
Tidal bore, Qiantang River, Hangzhou, China, Laoyanchang, Dam, Breaking bore, Fluid-structure interactions, Impact forces, Bore reflection, Embankment dam, 23 October 2024