Print Email Facebook Twitter Overtopping of coastal structures by tsunami waves Title Overtopping of coastal structures by tsunami waves Author Esteban, Miguel (University of Tokyo) Glasbergen, Toni Takabatake, Tomoyuki (Waseda University) Hofland, Bas (TU Delft Hydraulic Structures and Flood Risk) Nishizaki, Shinsaku (Waseda University) Nishida, Yuta (Waseda University) Stolle, Jacob (University of Ottawa) Nistor, Ioan (University of Ottawa) Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk) Takagi, Hiroshi (Tokyo Institute of Technology) Shibayama, Tomoya (Waseda University) Date 2017-12-01 Abstract Following the 2011 Tohoku Earthquake and Tsunami, Japanese tsunami protection guidelines stipulate that coastal defences should ensure that settlements are shielded from the coastal inundation that would result from Level 1 tsunami events (with return periods in the order of about 100 years). However, the overtopping mechanism and leeward inundation heights of tsunami bores as they hit coastal structures has received little attention in the past. To ascertain this phenomenon, the authors conducted physical experiments using a dam-break mechanism, which could generate bores that overtopped different types of structures. The results indicate that it is necessary to move away from only considering the tsunami inundation height at the beach, and also consider the bore velocity as it approaches the onshore area. The authors also prepared a simple, conservative method of estimating the inundation height after a structure of a given height, provided that the incident bore velocity and height are known. Subject Coastal dykeDam breakEvacuationOvertoppingTsunami To reference this document use: http://resolver.tudelft.nl/uuid:b0eef0a3-bec3-4ec2-baf7-8843297f09d1 DOI https://doi.org/10.3390/geosciences7040121 Source Geosciences (Switzerland), 7 (4), 1-17 Part of collection Institutional Repository Document type journal article Rights © 2017 Miguel Esteban, Toni Glasbergen, Tomoyuki Takabatake, Bas Hofland, Shinsaku Nishizaki, Yuta Nishida, Jacob Stolle, Ioan Nistor, J.D. Bricker, Hiroshi Takagi, Tomoya Shibayama Files PDF geosciences_07_00121.pdf 2.32 MB Close viewer /islandora/object/uuid:b0eef0a3-bec3-4ec2-baf7-8843297f09d1/datastream/OBJ/view