Crest-length effects in nearshore tsunami run-up around islands

Yong-Sik Cho, Philip L.F. Liu

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The large run-up heights observed on the lee side of a circular island are investigated, using the shallow-water equations, to understand the devastating run-up heights reported in the lees of both Babi and Okushiri Islands during the Flores 1992 and the Hokkaido 1993 tsunamis. Specifically, the effects of the crest length of incident waves are examined both numerically and experimentally. It is found that the run-up heights around a circular island are strongly dependent on the crest length of incident waves when the crest length is less than the base diameter of the island but are almost insensitive if the crest length is greater than twice the base diameter. This observation implies that it may be possible to calculate a worst case scenario of run-up on an island from nearshore events.

Original languageEnglish
Article number1999JC900012
Pages (from-to)7907-7913
Number of pages7
JournalJournal of Geophysical Research: Oceans
Volume104
Issue numberC4
StatePublished - 1999 Apr 15

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Crest-length effects in nearshore tsunami run-up around islands. / Cho, Yong-Sik; Liu, Philip L.F.

In: Journal of Geophysical Research: Oceans, Vol. 104, No. C4, 1999JC900012, 15.04.1999, p. 7907-7913.

Research output: Contribution to journalArticle

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