Inter-model analysis of tsunami-induced coastal currents


Lynett P. J. , Gately K., Wilson R., Montoya L., Arcas D., Aytore B., ...Daha Fazla

OCEAN MODELLING, cilt.114, ss.14-32, 2017 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 114
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1016/j.ocemod.2017.04.003
  • Dergi Adı: OCEAN MODELLING
  • Sayfa Sayıları: ss.14-32

Özet

To help produce accurate and consistent maritime hazard products, the National Tsunami Hazard Mitigation Program organized a benchmarking workshop to evaluate the numerical modeling of tsunami currents. Thirteen teams of international researchers, using a set of tsunami models currently utilized for hazard mitigation studies, presented results for a series of benchmarking problems; these results are summarized in this paper. Comparisons focus on physical situations where the currents are shear and separation driven, and are thus de-coupled from the incident tsunami waveform. In general, we find that models of increasing physical complexity provide better accuracy, and that low-order three-dimensional models are superior to high-order two-dimensional models. Inside separation zones and in areas strongly affected by eddies, the magnitude of both model-data errors and inter-model differences can be the same as the magnitude of the mean flow. Thus, we make arguments for the need of an ensemble modeling approach for areas affected by large-scale turbulent eddies, where deterministic simulation may be misleading. As a result of the analyses presented herein, we expect that tsunami modelers now have a better awareness of their ability to accurately capture the physics of tsunami currents, and therefore a better understanding of how to use these simulation tools for hazard assessment and mitigation efforts. (C) 2017 Elsevier Ltd. All rights reserved.