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Nat. Hazards Earth Syst. Sci., 8, 175185, 2008 www.nat-hazards-earth-syst-sci.net/8/175/2008/

Summary: Nat. Hazards Earth Syst. Sci., 8, 175­185, 2008
© Author(s) 2008. This work is licensed
under a Creative Commons License.
Natural Hazards
and Earth
System Sciences
Near-coast tsunami waveguiding: phenomenon and simulations
E. van Groesen1,2, D. Adytia2, and Andonowati1,2,3
1Department of Applied Mathematics, University of Twente, The Netherlands
2LabMath-Indonesia, Bandung, Indonesia
3Department of Mathematics, Institut Teknologi Bandung, Indonesia
Received: 5 November 2007 ­ Revised: 31 January 2008 ­ Accepted: 3 February 2008 ­ Published: 3 March 2008
Abstract. In this paper we show that shallow, elongated parts
in a sloping bottom toward the coast will act as a waveguide
and lead to large enhanced wave amplification for tsunami
waves. Since this is even the case for narrow shallow regions,
near-coast tsunami waveguiding may contribute to an expla-
nation that tsunami heights and coastal effects as observed in
reality show such high variability along the coastline. For ac-


Source: Al Hanbali, Ahmad - Department of Applied Mathematics, Universiteit Twente
Ecole Polytechnique, Centre de mathématiques


Collections: Engineering; Mathematics