VERTICAL STRUCTURE OF WAVE INDUCED CURRENTS, ORBITAL VELOCITY AND TURBULENCE OBSERVED IN NATURAL VEGETATION

Hyun-Doug Yoon; Daniel Cox; Dennis Albert; Heather Smith; Nobuhito Mori; Philip Blackmar

doi:10.9753/icce.v34.waves.61

No. 34 (2014), Waves

No. 34 (2014)

VERTICAL STRUCTURE OF WAVE INDUCED CURRENTS, ORBITAL VELOCITY AND TURBULENCE OBSERVED IN NATURAL VEGETATION

Waves

https://doi.org/10.9753/icce.v34.waves.61

Published 2014-12-09

Hyun-Doug Yoon⁺⁻
Daniel Cox⁺⁻
Dennis Albert
Heather Smith
Nobuhito Mori
Philip Blackmar

Hyun-Doug Yoon

Myongji University

Daniel Cox

Oregon State University

Dennis Albert

Heather Smith

Nobuhito Mori

Philip Blackmar

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Keywords

nearshore processses
coastal vegetation
currents
wave-induced velocity
turbulence
large-scale laboratory experiment

How to Cite

Yoon, H.-D., Cox, D., Albert, D., Smith, H., Mori, N., & Blackmar, P. (2014). VERTICAL STRUCTURE OF WAVE INDUCED CURRENTS, ORBITAL VELOCITY AND TURBULENCE OBSERVED IN NATURAL VEGETATION. Coastal Engineering Proceedings, 1(34), waves.61. https://doi.org/10.9753/icce.v34.waves.61

Abstract

Vertical structures of hydrodynamics under wave conditions were investigated using live plants in a large-scale wave flume. The effect of vegetation on hydrodynamics were analyzed for regular wave cases. The interaction of waves and emergent vegetation under regular waves significantly affect wave-induced motion and turbulence intensity. Coastal vegetation motion affected the water particle kinematics so that the vertical distribution of water particle velocity showed a large deviation from linear wave theory. Also, the vegetation motion increased turbulence intensity in the middle of water column and this caused a different vertical distribution of turbulent kinetic energy compard to the control case with no vegetation. In addition to the turbulence kinetic energy level, the vegetation changed the anisotropy characteristics of turbulence, decreasing vertical turbulent component.

https://doi.org/10.9753/icce.v34.waves.61

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References

Albert , D. A., D. T. Cox, T. Lemein and H.-D Yoon, 2013, Characterization of Schoenoplectus pungens in a Great Lakes Coastal Wetland and a Pacific Northwestern Estuary, Wetlands, doi 10.1007/s13157-013-0402-4.

Blackmar, P., D. T. Cox, and W.-C Wu, 2014, Laboratory observations and numerical simulations of wave height attenuation in heterogeneous vegetation, Journal of Waterway, Ports, Coastal and Ocean Engr., Am. Soc. Civil. Eng., 140(1), 56-65.

Kobayashi, N., Raichle, A.W., and Asano, T., 1993, Wave attenuation by vegetation, J. Wtrwy., Port, Coast., and Oc. Engrg., ASCE, 119 (1), 30-48.

Mori, N., T. Suzuki, and S. Kakuno. 2007. Noise of acoustic Doppler velocimeter data in bubbly flows, J. of Engrg Mech., 133, 122-125

Yoon. H.-D, D. T. Cox, D. A. Albert, N. Mori, H. Smith and J. Zarnetske, 2011, Ecological Modeling of emergent vegetation for sustaining wetlands in high wave energy coastal environments. Proceedings of Coastal Structures, Yokohama

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VERTICAL STRUCTURE OF WAVE INDUCED CURRENTS, ORBITAL VELOCITY AND TURBULENCE OBSERVED IN NATURAL VEGETATION

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