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| Titel |
Numerical Simulation of the 2004 Indian Ocean Tsunami: Accurate Flooding and drying in Banda Aceh |
| VerfasserIn |
Haiyang Cui, Julie Pietrzak, Guus Stelling, Alexey Androsov, Sven Harig |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250040701
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| Zusammenfassung |
| The Indian Ocean Tsunami on December 26, 2004 caused one of the largest tsunamis in
recent times and led to widespread devastation and loss of life. One of the worst hit regions
was Banda Aceh, which is the capital of the Aceh province, located in the northern part of
Sumatra, 150km from the source of the earthquake. A German-Indonesian Tsunami Early
Warning System (GITEWS) (www.gitews.de) is currently under active development. The
work presented here is carried out within the GITEWS framework. One of the aims of this
project is the development of accurate models with which to simulate the propagation,
flooding and drying, and run-up of a tsunami. In this context, TsunAWI has been
developed by the Alfred Wegener Institute; it is an explicit, () finite element model.
However, the accurate numerical simulation of flooding and drying requires the
conservation of mass and momentum. This is not possible in the current version of
TsunAWi. The P1NC - P1element guarantees mass conservation in a global sense, yet
as we show here it is important to guarantee mass conservation at the local level,
that is within each individual cell. Here an unstructured grid, finite volume ocean
model is presented. It is derived from the P1NC - P1 element, and is shown to be
mass and momentum conserving. Then a number of simulations are presented,
including dam break problems flooding over both a wet and a dry bed. Excellent
agreement is found. Then we present simulations for Banda Aceh, and compare the
results to on-site survey data, as well as to results from the original TsunAWI code. |
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