Tourists trying to escape incoming TsunamiWenny Kristina

 

Department of Applied Mathematics

Faculty of EEMCS

University of Twente

P.O. Box 217

7500 AE Enschede

The Netherlands

 

Room  : CI H344

Email   : w.kristina(at)math.utwente.nl

Phone : +31 53 489 3415

Fax      : +31 53 489 4833                                                                People running for their lives at the devastating tsunami 24 December 2004

                                                                                     (source : www.asiantsunamivideos.com)

 

Educational Background

v      Bachelor degree (January 2007):

Department of Mathematics and Natural Science

Universitas Brawijaya, Malang, Indonesia

Thesis : Numerical Simulation of Tsunami using Discontinuous Galerkin Finite Element Method

Supervisors : Dr. Agus Suryanto and Isnani Darti, M.Si.

 

v      MSc (August 2009) – PhD degree:

Department of Applied Mathematics

Universiteit Twente, Enschede, The Netherlands

Project : Modeling of tsunami’s

Supervisors : Prof. Dr. Ir. E. W. C. van Groesen and Dr. Ir. Onno Bokhove

 

 

Project description

This project aims to increase our understanding of various aspects of nearshore tsunami flows using analytical and simulation tools. In particular, we aim to significantly improve predictions of the large spatial variability of tsunami waveheights along the coast. To that aim, through a detailed theoretical and numerical study of run-up and rundown characteristics of waves in their dependence on land topography and friction parameters, we will derive so-called parameterized effective boundary conditions (EBCs) to be imposed at the shoreline. These boundary conditions are of general relevance and can be implemented in any numerical program to approximate the onshore tsunami flow without the necessity to calculate the detailed flooding and drying flows.

We will implement the EBCs in a newly derived Variational Boussinesq Model and Code and simulate specific cases of tsunami propagation in the Indonesian coastal seas. One case will deal with nearshore tsunami waveguiding which may cause locally large enhancement of wave heights due to transversal  shallower regions.

 

 

Some Numerical Results

As the starting point of the project, these are some numerical results of 2-dimensional Linear Variational Boussinesq Model simulation with Finite Element Method (quadrilateral grid). The first column shows the initial conditions, the rests show the plots after several time. Hard-wall is used as the boundary condition here.

                       

 

                     

                    

 

 

Talks

v      Effective Boundary Condition for Wave Reflection over Slowly Varying Bathymetry, PhD TW Colloquium, Universiteit Twente, 11 February 2010.

v      Inverse Modeling in Geodesy Problem, Jonge-Honden Seminar, MPCM Group, Universiteit Twente, 19 March 2009.

v      One Dimensional Seismic Tomography: A Least Square Approach, Mathematical Physics Seminar, AAMP Group, Universiteit Twente, 21 February 2008.

 

 

Poster Presentations

v      Wave Reflection over Slowly Varying Bathymetry modeled by Effective Boundary Conditions, 34th Woudschoten Conference, Zeist, The Netherlands, 7-9 October 2009 (pdf).

v      Tsunami Waveguiding Simulation above Synthetic and Realistic Bathymetries (second author), EGU General Assembly, Vienna, Austria, 19-24 April 2009 (pdf).

 

 

Links

v      Applied Analysis and Mathematical Physics (AAMP), Universiteit Twente.

v      Numerical Analysis and Computational Mechanics (NACM), Universiteit Twente.

v      LabMath-Indonesia (LMI), Bandung.

 

v      Indonesian Student Association in Enschede (PPIE).

v      University of Twente – Indonesia Support Office (UT-ISO).

 

 

 

 

 

 

 

 

Last update: 25 May 2010