Vol. 3, No. 10, 2008

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ISSN: 1559-3959
Numerical simulation of tsunami propagation using the characteristic-based split method

Gunawan Budi Wijaya, Tam Thanh Bui and Worsak Kanok-Nukulchai

Vol. 3 (2008), No. 10, 1939–1962
Abstract

A disastrous tsunami struck North Sumatra, Indonesia and many other countries on December 26, 2004. In response to this disaster, we develop a two-dimensional numerical model to simulate tsunami propagation on the open sea. Tsunami propagation — a process during which the wave has a relatively small height compared to its breadth — is modeled using the shallow water equations. To solve these equations, our model employs the characteristic-based split method first introduced by Zienkiewicz. Four case studies are proposed to verify the numerical model, and our results show that the present numerical model is both accurate and efficient. The numerical model is then used to model the propagation of the tsunami of December 26, 2004, and gives a relatively close result.

Keywords
tsunami propagation, shallow water equations, finite element method, characteristic-based split method
Milestones
Received: 15 June 2007
Revised: 19 February 2008
Accepted: 21 February 2008
Published: 1 December 2008
Authors
Gunawan Budi Wijaya
School of Engineering and Technology
Asian Institute of Technology
P.O. Box 4 Klong Luang, Pathumthani 12120
Thailand
Tam Thanh Bui
School of Engineering and Technology
Asian Institute of Technology
P.O. Box 4 Klong Luang, Pathumthani 12120
Thailand
Worsak Kanok-Nukulchai
School of Engineering and Technology
Asian Institute of Technology
P.O. Box 4 Klong Luang, Pathumthani 12120
Thailand