Debris damming loads and effect in tsunami-like events

Stolle Jacob, Nistor Loan, Takabatake Tomoyuki, Goseberg Nils, Petriu Emil, Shibayama Tomoya

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

Abstract

Debris loading during extreme flooding events has been documented by many post-tsunami field surveys of disaster-stricken communities and, as such, it is now considered and accounted for as a critical design consideration in building resilient infrastructure. Debris damming is one of the debris loads of concern, occurring when solid objects entrained within the inundating flow accumulate at the face of a structure or a structural element. The presence of the debris dam results in increased drag loads on the structure and can have other associated effects, such as flow runup and flow accelerations, that can cause increased scouring at foundations. The focus of debris damming studies has been within river engineering: Therefore, previous studies have been performed in steady-state conditions. The study presented here is the first to examine debris damming in transient, supercritical flow conditions. The study uses a modified dam-break wave as the hydrodynamic forcing condition and the debris are scaled down debris types common in coastal areas (shipping containers, hydro poles, and boards). The study qualitatively examines the difference in the debris damming mechanisms as a result of distinct flow conditions associated with a dam-break wave interacting with a surface-piercing obstacle. Additionally, the study aimed to determine the influence of the debris dam. It was found that maximum loading condition occurred earlier and of greater magnitude than for the clear water case.

Original languageEnglish
Title of host publication6th International Disaster Mitigation Specialty Conference 2018, Held as Part of the Canadian Society for Civil Engineering Annual Conference 2018
EditorsAlan Lloyd, Ioan Nistor
PublisherCanadian Society for Civil Engineering
Pages70-80
Number of pages11
ISBN (Electronic)9781510889736
Publication statusPublished - 2018
Event6th International Disaster Mitigation Specialty Conference 2018, Held as Part of the Canadian Society for Civil Engineering Annual Conference 2018 - Fredericton, Canada
Duration: 2018 Jun 132018 Jun 16

Publication series

Name6th International Disaster Mitigation Specialty Conference 2018, Held as Part of the Canadian Society for Civil Engineering Annual Conference 2018

Conference

Conference6th International Disaster Mitigation Specialty Conference 2018, Held as Part of the Canadian Society for Civil Engineering Annual Conference 2018
CountryCanada
CityFredericton
Period18/6/1318/6/16

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology

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