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Effectiveness of Small Onshore Seawall in Reducing Forces Induced by Tsunami Bore: Large Scale Experimental Study

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https://ir.library.oregonstate.edu/concern/articles/kh04dq23w

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  • Tsunami force and pressure distributions on a rigid wall fronted by a small seawall were determined experimentally in a large-scale wave flume. Six different seawall heights were examined, two of which were exposed to a range of solitary wave heights. The same experiment was done without a seawall for comparison. The measured wave profile contained incident offshore, incident broken, reflected broken, and transmitted wave heights measured using wire resistance and ultrasonic wave gauges. Small individual seawalls increased reflection of the incoming broken bore front and reduced force on the rigid landward wall. These findings agree well with published field reconnaissance on small seawalls in Thailand that showed a correlation between seawalls and reduced damage on landward structures.
  • This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Fuji Technology Press. The published article can be found at: http://www.fujipress.jp/JDR/.
  • Keywords: tsunami inundation, tsunami defense strategy, tsunami hazard mitigation, tsunami risk reduction, wave forces
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  • Oshnack, M.E., Aguíñiga, F., Cox, D, Gupta, R., van de Lindt, J. 2009 Effectiveness of Small Onshore Seawalls in Reducing Tsunami Forces Induced by Tsunami Bore: Large Scale Experimental Study. Journal of Disaster Research, 4(6):382-390.
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  • 4
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  • 6
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  • This research was supported by the National Science Foundation under Grant No. CMMI-0830378. The tsunami facility is supported in part by the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) Program of the United States National Science Foundation under Award Number CMMI-0402490.
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