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| Titel |
Examination of three practical run-up models for assessing tsunami impact on highly populated areas |
| VerfasserIn |
A. Muhari, F. Imamura, S. Koshimura, J. Post |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 12 ; Nr. 11, no. 12 (2011-12-02), S.3107-3123 |
| Datensatznummer |
250009819
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| Publikation (Nr.) |
 copernicus.org/nhess-11-3107-2011.pdf |
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| Zusammenfassung |
| This paper describes the examination of three practical tsunami run-up
models that can be used to assess the tsunami impact on human beings in
densely populated areas. The first of the examined models applies a uniform
bottom roughness coefficient throughout the study area. The second uses a
very detailed topographic data set that includes the building height
information integrated on a Digital Elevation Model (DEM); and the third
model utilizes different bottom roughness coefficients, depending on the type
of land use and on the percentage of building occupancy on each grid cell.
These models were compared with each other by taking the one with the most
detailed topographic data (which is the second) as reference. The analysis
was performed with the aim of identifying how specific features of high
resolution topographic data can influence the tsunami run-up
characteristics. Further, we promote a method to be used when very detailed
topographic data is unavailable and discuss the related limitations. To this
purpose we demonstrate that the effect of buildings on the tsunami flow can
be well modeled by using an equivalent roughness coefficient if the
topographic data has no information of building height. The results from the
models have been utilized to quantify the tsunami impact by using the
tsunami casualty algorithm. The models have been applied in Padang city,
Indonesia, which is one of the areas with the highest potential of tsunami
risk in the world. |
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