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Tidal Bore Research at the University of Queensland

Description

In an open channel, canal, river or estuary, a sudden increase in flow depth induces a positive surge, also called compression wave or bore. In an estuary, the flood tidal wave may become a tidal bore during the early flood tide in a narrow funneled channel under large tidal ranges. A related geophysical application is the up-river propagation of tsunami. During the 26 December 2004 and 10 March 2011 tsunami disasters, the rapid advances of the tsunami waters caused massive inland damage, when tsunami bores followed rivers and canals. In each situation, after its onset, the bore may be analysed as a hydraulic jump in translation.

Tidal bore research as been very active at the University of Queensland for the past 20 years. Combining field observations, laboratory experiments, CFD modelling and theoretical modelling, major advances have been made.

 

References

CHANSON, H. (2011). "Tidal Bores, Aegir, Eagre, Mascaret, Pororoca: Theory and Observations." World Scientific, Singapore, 220 pages (ISBN 9789814335416).

CHANSON, H. and LUBIN, P. (2013). "Mixing and Sediment Processes induced by Tsunamis propagating Upriver" in "Tsunamis: Economic Impact, Disaster Management and Future Challenges." Nova Science Publishers, Hauppauge NY, USA, T. CAI Editor, Chapter 3, pp. 65-102 (ISBN 978-1-62808-682-9).

LENG, X., and CHANSON, H. (2017). "Upstream Propagation of Surges and Bores: Free-Surface Observations." Coastal Engineering Journal, Vol. 59, No. 1, paper 1750003, 32 pages & 4 videos (DOI: 10.1142/S0578563417500036).