Integration of coastal inundation modeling from storm tides to individual waves

Ning Li, Volker Roeber, Yoshiki Yamazaki, Troy W. Heitmann, Yefei Bai, Kwok Fai Cheung

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Modeling of storm-induced coastal inundation has primarily focused on the surge generated by atmospheric pressure and surface winds with phase-averaged effects of the waves as setup. Through an interoperable model package, we investigate the role of phase-resolving wave processes in simulation of coastal flood hazards. A spectral ocean wave model describes generation and propagation of storm waves from deep to intermediate water, while a non-hydrostatic storm-tide model has the option to couple with a spectral coastal wave model for computation of phase-averaged processes in a near-shore region. The ocean wave and storm-tide models can alternatively provide the wave spectrum and the surface elevation as the boundary and initial conditions for a nested Boussinesq model. Additional surface-gradient terms in the Boussinesq equations maintain the quasi-steady, non-uniform storm tide for modeling of phase-resolving surf and swash-zone processes as well as combined tide, surge, and wave inundation. The two nesting schemes are demonstrated through a case study of Hurricane Iniki, which made landfall on the Hawaiian Island of Kauai in 1992. With input from a parametric hurricane model and global reanalysis and tidal datasets, the two approaches produce comparable significant wave heights and phase-averaged surface elevations in the surf zone. The nesting of the Boussinesq model provides a seamless approach to augment the inundation due to the individual waves in matching the recorded debris line along the coast.

Original languageEnglish
Pages (from-to)26-42
Number of pages17
JournalOcean Modelling
Volume83
DOIs
Publication statusPublished - 2014 Nov 1

Keywords

  • Boussinesq model
  • Circulation model
  • Coastal inundation
  • Spectral wave model
  • Storm tides
  • Wave setup

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Oceanography
  • Geotechnical Engineering and Engineering Geology
  • Atmospheric Science

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