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Technical Report of LabMath-Indonesia No: LMI-GeoMath-07/02

Summary: Technical Report of LabMath-Indonesia
No: LMI-GeoMath-07/02
Date: 15 October 2007
Near coast tsunami waveguiding: simulations for various wave
E. van Groesen a,b,
D. Adytia b
Andonowati a,b,c
G. Klopman a
aApplied Mathematics, University of Twente, The Netherlands
bLabMath-Indonesia, Bandung, Indonesia
cMathematics, Institut Teknologi Bandung, Indonesia
Received 15 October 2007
Shallow parts in a sloping bottom toward the coast can be expected to act as a waveguide, in partial analogy with optical
waveguiding. We will present numerical simulations that convincingly show that large enhanced wave amplification
happens for tsunami waves in certain geometries and bathymetries. Since this is even the case for shallow regions that
have cross sections of the order of badly resolved numerical scales, this phenomenon may at least partly explain that
tsunami heights and coastal effects as observed in reality show such high variability along the coastline.
This report, following [1], supports a more concise publication that will be published soon [2]. In this report we will


Source: Al Hanbali, Ahmad - Department of Applied Mathematics, Universiteit Twente


Collections: Engineering