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Near-coast tsunami waveguiding: phenomenon and simulations
1Department of Applied Mathematics, University of Twente, The Netherlands
2LabMath-Indonesia, Bandung, Indonesia
3Department of Mathematics, Institut Teknologi Bandung, Indonesia
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 explanation that tsunami heights and coastal effects as observed in reality show such high variability along the coastline. For accurate simulations, the complicated flow near the waveguide has to be resolved accurately, and grids that are too coarse will greatly underestimate the effects. We will present some results of extensive simulations using shallow water and a linear dispersive Variational Boussinesq model.
Full Article (PDF, 1593 KB)
Citation: van Groesen, E., Adytia, D., and Andonowati, : Near-coast tsunami waveguiding: phenomenon and simulations, Nat. Hazards Earth Syst. Sci., 8, 175-185, 2008. Bibtex EndNote Reference Manager
