JDR Vol.4 No.6 pp. 382-390
doi: 10.20965/jdr.2009.p0382


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

Mary Elizabeth Oshnack*, Francisco Aguíñiga**, Daniel Cox*, Rakesh Gupta*, and John van de Lindt***

*Oregon State University, Corvallis, Oregon 97331-3212, USA

**Texas A&M University-Kingsville, Kingsville, Texas 78363-8203, USA

***Colorado State University, Fort Collins, CO 80523-1372, USA

August 15, 2009
October 29, 2009
December 1, 2009
tsunami hazard mitigation, tsunami inundation, tsunami risk reduction, tsunami defense strategy, wave forces

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.

Cite this article as:
M. Oshnack, F. Aguíñiga, D. Cox, R. Gupta, and J. Lindt, “Effectiveness of Small Onshore Seawall in Reducing Forces Induced by Tsunami Bore: Large Scale Experimental Study,” J. Disaster Res., Vol.4, No.6, pp. 382-390, 2009.
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Last updated on Aug. 16, 2018