Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
doi:10.5194/nhess-2016-353
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
23 Dec 2016
Review status
This discussion paper is under review for the journal Natural Hazards and Earth System Sciences (NHESS).
Simulations of Moving Effect of Coastal Vegetation on Tsunami Damping
Ching-Piao Tsai, Ying-Chi Chen, Tri Octaviani Sihombing, and Chang Lin Department of Civil Engineering, National Chung Hsing University, Taichung 402, Taiwan
Abstract. A coupled wave-vegetation simulation is presented for the moving effect of the coastal vegetation on tsunami wave height damping. The problem is idealized by solitary wave propagating on a group of emergent cylinders. The numerical model is based on general Reynolds-averaged Navier-Stokes equations associated with renormalization group turbulent closure model by using volume of fluid technique. The general moving object (GMO) model developed in CFD code Flow-3D is applied to simulate the coupled motion of vegetation with wave dynamically. The damping of wave height and the turbulent kinetic energy dissipation as waves passed over both moving and stationary cylinders are discussed. As comparing with the stationary cylinders, it obtains markedly less wave height damping and turbulent kinetic energy dissipation by the moving cylinders. The result implies that the wave decay by the coastal vegetation might be overestimated if the mangrove vegetation was represented as stationary state.

Citation: Tsai, C.-P., Chen, Y.-C., Sihombing, T. O., and Lin, C.: Simulations of Moving Effect of Coastal Vegetation on Tsunami Damping, Nat. Hazards Earth Syst. Sci. Discuss., doi:10.5194/nhess-2016-353, in review, 2016.
Ching-Piao Tsai et al.
Ching-Piao Tsai et al.
Ching-Piao Tsai et al.

Viewed

Total article views: 143 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
125 16 2 143 1 3

Views and downloads (calculated since 23 Dec 2016)

Cumulative views and downloads (calculated since 23 Dec 2016)

Viewed (geographical distribution)

Total article views: 143 (including HTML, PDF, and XML)

Thereof 143 with geography defined and 0 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 25 Feb 2017
Publications Copernicus
Download
Short summary
A huge tsunami in South East Asia in 2004 has stimulated a debate about the role played coastal ecosystems in protecting coastal area. Previous approaches assumed that mangrove is stationary and neglected the plant motion with wave. This may lead to overestimate the effectiveness of coastal vegetation on tsunami daming. This paper presents a coupled wave-vegetation simulation and concludes that the tsunami wave height damping may be much overestimated if neglected vegetation motion with wave.
A huge tsunami in South East Asia in 2004 has stimulated a debate about the role played coastal...
Share