Global-to-local scale storm surge modelling on tropical cyclone affected coasts

Simone De Kleermaeker, Martin Verlaan, Thomas Mortlock, Joao Lima Rego, Maialen Irazoqui Apecechea, Kun Yan, Daniel Twigt

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

1 Citation (Scopus)

Abstract

The physics of extreme high-water during coastal storms covers a wide range of scales, from tides and storms propagating over long distances to the shape of local bays, reefs and islands all contributing to what is potentially extreme high-water. Traditionally, modelling of storm-surges is mostly performed at a regional scale, sometimes extended with nested more detailed models to account for local effects. With the development of more and more accurate global tide and surge models this division may shift. In this study we show the recent advances of the Global Tide Surge Model, since our previous report [9] of version 1, including Self-Attraction and Loading (SAL) representation, dissipation of internal waves, grid refinements near the coast and bathymetry at the South Pole. An open question is now, how to incorporate local effects with a global model. One option is to mimic the traditional approach and use the global model as a template for a regional model. Another option is to bypass the regional model and directly nest a detailed model in the global one. We will show an example of the first in this paper. An example of the second is planned as a collaborative initiative between Deltares and Risk Frontiers. An important question is what level is needed at the various scales needed to obtain accurate results. We will present both cases at the conference.

Original languageEnglish
Title of host publicationAustralasian Coasts & Ports 2017
Subtitle of host publicationworking with nature
Place of PublicationBarton, ACT
PublisherEngineers Australia
Pages358-364
Number of pages7
ISBN (Print)9781922107916
Publication statusPublished - 1 Jan 2017
Externally publishedYes
EventAustralasian Coasts and Ports 2017 Conference - Cairns, Australia
Duration: 21 Jun 201723 Jun 2017

Conference

ConferenceAustralasian Coasts and Ports 2017 Conference
CountryAustralia
CityCairns
Period21/06/1723/06/17

Keywords

  • Cyclones
  • Risk assessment
  • Sensitivity analysis
  • Storm surge

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  • Cite this

    De Kleermaeker, S., Verlaan, M., Mortlock, T., Rego, J. L., Apecechea, M. I., Yan, K., & Twigt, D. (2017). Global-to-local scale storm surge modelling on tropical cyclone affected coasts. In Australasian Coasts & Ports 2017: working with nature (pp. 358-364). Barton, ACT: Engineers Australia.