Study on the accuracy of the tsunami numerical model around obstacles

Sung Jin Hong, Fumihiko Imamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Equivalent Roughness Model (ER-model) based on shallow water theory is applied to investigate an interacted resistance force between wave and an obstacle. The model is modified to obtain an appropriate friction coefficient with an obstacle at the bottom by means of the ratio of area occupied by it on the grid area. Through a comparison with measured data, the quantitative verification about ER-model is carried out to discuss its applicability. From those results, it is indicated that the numerical error obtained around obstacles is affected by the physical modeling error such as vertical acceleration or local velocity that occurred due to the effect of obstacles rather than the truncation error. Furthermore, the relationship between friction coefficient and ratio of area occupied is discussed, and we could give the criterion for grid size selection for appropriate representation of the effect of obstacle in ER-model.

Original languageEnglish
Title of host publicationAsian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference
EditorsYoshimi Goda, Kazuo Nadaolta, Wataru Kiolta
Publisher[publishername] World Scientific
ISBN (Print)9789812703040
DOIs
Publication statusPublished - 2004
Event2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003 - Chiba, Japan
Duration: 2004 Feb 292004 Mar 4

Publication series

NameAsian and Pacific Coasts, 2003 - Proceedings of the 2nd International Conference

Conference

Conference2nd International Conference on Asian and Pacific Coasts, APAC (WITH CD-ROM) 2003
CountryJapan
CityChiba
Period04/2/2904/3/4

Keywords

  • ER-model
  • Equivalent roughness
  • Numerical error
  • Numerical model
  • Tsunami

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

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