Tsunami Bore Overtopping Of Coastal Structures

Tsunami Bore Overtopping Of Coastal Structures

Esteban, Miguel (University of Tokyo)
Takabatake, Tomoyuki (Waseda University)
Glasbergen, Toni
Hofland, B. (TU Delft Hydraulic Structures and Flood Risk; Deltares)
Nishida, Yuta (Waseda University)
Nishiazaki, Shinsaku (Waseda University)
Stolle, Jacob (University of Ottawa, Canada)
Nistor, Ioan (University of Ottawa, Canada)
Takagi, Hiroshi (Tokyo Institute of Technology)
Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk)
Shibayama, Tomoya (Waseda University)

2018

In the aftermath of the 2011 Tohoku Earthquake and Tsunami Japanese tsunami protection philosophy now dictates that coastal defences should prevent the land that they protect from being flooded under a Level 1 event (with a return period in the order of about 100 years). To ascertain the overtopping mechanism and leeward inundation heights of tsunamis as they hit coastal structures, the authors conducted physical experiments using a dam-break mechanism, which could generate bores that overtopped different types of structures. Three different types of structures were considered, namely a wall of “infinite” height, a coastal dyke, and a vertical tsunami wall. The results show that the velocity of the tsunami bore is crucial in determining whether the structure will be overtopped or not, and thus it is imperative to move away from only considering
the tsunami inundation height at the beach.

tsunami bores
overtopping
dam break
coastal dykes
laboratory experiments

http://resolver.tudelft.nl/uuid:458c254b-3709-4f22-b7ee-dc2e30673612

Proceedings of the 7th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science (Coastlab18): Santander, Spain, May 22-26, 2018

Institutional Repository

conference paper

© 2018 Miguel Esteban, Tomoyuki Takabatake, Toni Glasbergen, B. Hofland, Yuta Nishida, Shinsaku Nishiazaki, Jacob Stolle, Ioan Nistor, Hiroshi Takagi, J.D. Bricker, Tomoya Shibayama