Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162823
Title: Derivation, validation, and numerical implementation of a two-dimensional boulder transport formulation by coastal waves
Authors: Watanabe, Masashi
Yoshii, Takumi
Roeber, Volker
Goto, Kazuhisa
Imamura, Fumihiko
Keywords: Science::Geology
Issue Date: 2023
Source: Watanabe, M., Yoshii, T., Roeber, V., Goto, K. & Imamura, F. (2023). Derivation, validation, and numerical implementation of a two-dimensional boulder transport formulation by coastal waves. Journal of Earthquake and Tsunami, 17(1), 2250018-. https://dx.doi.org/10.1142/S179343112250018X
Journal: Journal of Earthquake and Tsunami 
Abstract: Numerical computations for boulder transport have become a state-of-the-art tool for hindcasting the hydraulic processes associated with past storm wave and tsunami events. Since most previously developed two-dimensional formulations cater to boulders with symmetric outlines, they can consequently reproduce the transport distance and the velocity of boulders of cubic shape or similar structured geometries reasonably well. However, the formulations exhibit limitations when applied to rectangular- and flat-shaped boulders. The presently available formulations have difficulties reproducing the variations of frictional drag force due to the changes of the boulders' contact time with the ground. We have developed an extended boulder transport formulation and derived a new empirical roughness coefficient by considering the shape of boulders that accounts for the changes of the boulders' contact time with the ground. In comparison to other existing transport formulations, the present method provides superior accuracy of block velocity and transport distance in most cases - especially for boulders of rectangular geometry. Even by neglecting the full three-dimensional processes, numerical computations extended with the proposed boulder transport formulation can help explaining historic wave regimes, which were responsible for the transport of a variety of coastal boulders reported around the world.
URI: https://hdl.handle.net/10356/162823
ISSN: 1793-4311
DOI: 10.1142/S179343112250018X
Rights: Electronic version of an article published as Journal of Earthquake and Tsunami, 17(1), 2023, 2250018, https://doi.org/10.1142/S179343112250018X @ copyright World Scientific Publishing Company, https://www.worldscientific.com/doi/10.1142/S179343112250018X.
Fulltext Permission: embargo_20230411
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

Files in This Item:
File Description SizeFormat 
Derivation, Validation, and Numerical Implementation of a Two Dimensional Boulder Transport Formulation by Coastal Waves.pdf
  Until 2023-04-11
2.28 MBAdobe PDFUnder embargo until Apr 11, 2023

Page view(s)

12
Updated on Nov 30, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.