Title: ON THE INFLUENCE OF NEARSHORE BATHYMETRY DATA QUALITY ON TSUNAMI RUNUP MODELLING, PART II: MODELLING
Abstract: Asian and Pacific Coasts 2009, pp. 157-163 (2009) No AccessON THE INFLUENCE OF NEARSHORE BATHYMETRY DATA QUALITY ON TSUNAMI RUNUP MODELLING, PART II: MODELLINGSTEFAN LESCHKA, WIDJO KONGKO and OLE LARSENSTEFAN LESCHKADHI-NTU Water & Environment Research Centre and Education Hub, 200 Pandan Loop #08-03, Singapore 128388, Singapore, WIDJO KONGKOInstitute of Environment & Human Security, United Nations University, Herrmann-Ehlers-Str. 10, Bonn, 53113, Germany and OLE LARSENDHI-NTU Water & Environment Research Centre and Education Hub, 200 Pandan Loop #08-03, Singapore 128388, Singaporehttps://doi.org/10.1142/9789814287951_0017Cited by:2 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail Abstract: Hazard and risk mapping plays an increasing role to prepare population and local authorities for tsunami events. They base on inundation modeling results. Recently, non-linear shallow water type models are the preferred choice to predict runup and inundation of tsunamis on real bathymetries. A validation of model results is very difficult due to complex phenomena occurring during the tsunamigenic earthquake and wave propagation nearshore and onshore, which are not taken into account completely by the models. Apart from consideration of such phenomena, the quality of bathymetrical data influences model results also (Kongko et al., 2008). In this paper, consisting of two parts, the influence of deviations from exact nearshore data has been investigated. Part I has been related to the discussion on different data sets. In part II the model setup and results are presented and discussed. The non-linear shallow water model MIKE 21 FM has been used to calculate runup and inundation of the 2006 Java Earthquake tsunami in the region of Cilacap (Indonesia). The source has been modeled using a time variable bathymetry from Okada's (1985) model. An inverse solution of the fault parameters from tide gauge records lead to the possibility to validate the results using post tsunami field survey data. Bathymetries have been interpolated on a mesh of 20 to 30 m resolution nearshore and onshore from multi-beam measurements, tide corrected single-beam data, single beam data without tidal correction, C-Map data and from multi-beam data, where an artificial reef has been added. Finally, a bathymetry of much finer resolution has been compared with field survey data. The study shows that even big local differences between the data do not have noteworthy effects on runup. In recent model applications using a mesh resolution of 20 to 30 m nearshore and onshore to capture local current fields, however, bathymetry variation at this scale show little influence on the results. FiguresReferencesRelatedDetailsCited By 221 May 2003 Boumerdès Earthquake: Numerical Investigations of the Rupture Mechanism Effects on the Induced Tsunami and Its Impact in HarborsMarinella Masina, Renata Archetti and Alberto Lamberti17 November 2020 | Journal of Marine Science and Engineering, Vol. 8, No. 11Influence of Nearshore Bathymetry Changes on the Numerical Modelling of Dune ErosionConstantin Schweiger, Nils Koldrack, Christian Kaehler and Holger Schuettrumpf1 May 2020 | Journal of Coastal Research, Vol. 36, No. 3 Asian and Pacific Coasts 2009Metrics History PDF download
Publication Year: 2009
Publication Date: 2009-09-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 2
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