A numerical model for far-field tsunamis and its application to predict damages done to aquaculture

Osami Nagano, Fumihiko Imamura, Nobuo Shuto

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The 1960 Chilean tsunami which traveled the Pacific Ocean and caused much damages to Japan is simulated from its generation to the terminal effects on coastal areas. In the computation of ocean propagation by the linear longwave theory, a new technique is introduced to keep the same accuracy as the linear Boussinesq equation and reduce the CPU time as well as the computer memory. In the coastal transformation computation, the energy dissipation due to sea-bottom scouring is suggested to be included, particularly in the case of long bays. To obtain accurate results, the current velocity requires finer spatial grids than the water surface elevation. Damage done to pearl culture rafts are explained in terms of the computed current velocity.

Original languageEnglish
Pages (from-to)235-255
Number of pages21
JournalNatural Hazards
Volume4
Issue number2-3
DOIs
Publication statusPublished - 1991 Jun 1

Keywords

  • Imamura number
  • The 1960 Chilean tsunami
  • damage to aquaculture
  • difference between farand near-field tsunamis
  • numerical simulation
  • sea-bottom scouring

ASJC Scopus subject areas

  • Water Science and Technology
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)

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