Journal of Fluid Mechanics



Runup of solitary waves on a circular Island


Philip L. -F.  Liu a1, Yong-Sik  Cho a1, Michael J.  Briggs a2, Utku  Kanoglu a3 and Costas Emmanuel  Synolakis a3
a1 School of Civil and Environmental Engineering Cornell University, Ithaca. NY 14853, USA
a2 Coastal Engineering Research Center, USAE Waterways Experiment Station, Vicksburg, MS 39180, USA
a3 Department of Civil Engineering, University of Southern California, Los Angeles, CA 90089-2531, USA

Article author query
liu pl   [Google Scholar] 
cho ys   [Google Scholar] 
briggs mj   [Google Scholar] 
kanoglu u   [Google Scholar] 
synolakis ce   [Google Scholar] 
 

Abstract

This is a study of the interactions of solitary waves climbing up a circular island. A series of large-scale laboratory experiments with waves of different incident height-to-depth ratios and different crest lengths is described. Detailed two-dimensional run-up height measurements and time histories of surface elevations around the island are presented. A numerical model based on the two-dimensional shallow-water wave equations including runup calculations was developed. Numerical model predictions agreed very well with the laboratory data and the model was used to study wave trapping and the effect of slope. Under certain conditions, enhanced runup and wave trapping on the lee side of the island were observed, suggesting a possible explanation for the devastation reported by field surveys in Babi Island off Flores, Indonesia, and in Okushiri Island, Japan.

(Published Online April 26 2006)
(Received August 22 1994)
(Revised June 5 1995)



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