쓰나미 파형이 수중식생의 에너지소산에 미치는 영향
Effects of Tsunami Waveform on Energy Dissipation of Aquatic Vegetation
2
조회
0
다운로드
5
인용
0
참고문헌
키워드
초록
The present study numerically investigated the influence of the waveform distribution on the tsunami-vegetation interaction using a non-reflected wave generation system for various tsunami waveforms in a two-dimensional numerical wave tank. First, it was possible to determine the wave attenuation mechanism due to the tsunami-vegetation interaction from the spatial waveform, flow field, vorticity field, and wave height distribution. The combination of fluid resistance in the vegetation and a large gap and creates a vortex according to the flow velocity difference in and out of the vegetation zone. Thus, the energy of a tsunami was increasingly reduced, resulting in a gradual reduction in wave height. Compared to existing approximation theories, the double volumetric ratio of the waveform increased the reflection coefficient of the tsunami-vegetation interaction by 34%, while decreasing the transfer coefficient and energy attenuation coefficient by 25% and 13%, respectively. Therefore, the hydraulic characteristics of a tsunami is highly likely to be underestimated if the solitary wave of the approximation theory is applied for the tsunami.
Abstract
The present study numerically investigated the influence of the waveform distribution on the tsunami-vegetation interaction using a non-reflected wave generation system for various tsunami waveforms in a two-dimensional numerical wave tank. First, it was possible to determine the wave attenuation mechanism due to the tsunami-vegetation interaction from the spatial waveform, flow field, vorticity field, and wave height distribution. The combination of fluid resistance in the vegetation and a large gap and creates a vortex according to the flow velocity difference in and out of the vegetation zone. Thus, the energy of a tsunami was increasingly reduced, resulting in a gradual reduction in wave height. Compared to existing approximation theories, the double volumetric ratio of the waveform increased the reflection coefficient of the tsunami-vegetation interaction by 34%, while decreasing the transfer coefficient and energy attenuation coefficient by 25% and 13%, respectively. Therefore, the hydraulic characteristics of a tsunami is highly likely to be underestimated if the solitary wave of the approximation theory is applied for the tsunami.
참고문헌 (46)
- Wave Dissipation by Vegetation, "Anderson, M. E.", U.S. Army Engineer Research and Development Center, 22~, pp.ERDC (2011), CHL CHETN-I-82
- Investigation of the Failure Mechanism of Kamaishi Breakwaters due to Tsunami; Initial Report Focusing on Hydraulic Characteristics, "Arikawa, T.", the Port and Airport Research Institute, 52~, pp.Technical Note of the Port and Airport Research Institute, Japan, 1251 (2012)
- Asano, T., "Interactions between Water Waves and Vegetation", Proceeding of the 23rd International Conference on Coastal Engineering, pp.2710~2723 (1992), ASCE
- Asano, T, "Wave Attenuation and Sediment Deposition due to Coastal Vegetation", Journal of Global Environment Engineering, 11, pp.29~44 (2006)
- Augustin, L. N., "Laboratory and Numerical Studies of Wave Damping by Emergent and Near-Emergent Wetland Vegetation", Coastal Engineering, 56, pp.332~340 (2009)
- Blackmar, P., "Laboratory Observations and Numerical Simulations of Wave Height Attenuation in Heterogeneous Vegetation", Journal of Waterway, Port, Coastal, and Ocean Engineering, 140, pp.56~65 (2014), ASCE
- Brackbill, J. U., "A Continuum Model for Modeling Surface Tension", Journal of Computational Physics, 100, pp.335~354 (1992)
- Brorsen, M., "Source Generation of Nonlinear Gravity Waves with the Boundary Integral Equation Method", Coastal Engineering, 11, pp.93~113 (1987)
- Cheng, N., "Hydraulic Radius for Evaluating Resistance Induced by Simulated Emergent Vegetation in Open-Channel Flows", Journal of Hydraulic Engineering, 137, pp.995~1004 (2011)
- Dean, R. G., "Water Wave Mechanics for Engineers and Scientists", pp.353~ (1984), Prentice-Hall
- Dubi, A., "Wave Damping by Kelp Vegetation", Proceeding of th 24th International Conference on Coastal Engineering, pp.142~156 (1994), ASCE
- Fenton, J., "A Ninth-Order Solution for the Solitary Wave:Part2", Journal of Fluid Mechanics, 53, pp.257~271 (1972)
- Tsunamis-The Propagation of Long Waves onto a Shelf, "Goring, D. G.", California Institute of Technology, 314~, pp.Report KH-R-38 (1978)
- Grimshaw, R., "The Solitary Wave in Water of Variable Depth:Part 2", Journal of Fluid Mechanics, 46, pp.611~622 (1971)
- Huang, Z., "Interaction of Solitary Waves with Emergent, Rigid Vegetation", Ocean Engineering, 38, pp.1080~1088 (2011)
- Iimura, K., "Numerical Simulation Estimating the Effects of Tree Density Distribution in Coastal Forest on Tsunami Mitigation", Ocean Engineering, 54, pp.223~232 (2012)
- Kim, W. G., "An Experimental Study for Wave Energy Attenuation by Vegetation Density", Master, pp.2008
- Kobayashi, N., "Wave Attenuation by Vegetation", Journal of Waterway, Port, Coastal, and Ocean Engineering, 119, pp.30~48 (1993), ASCE
- Lara, J. L., "Large-Scale 3-D Experiments of Wave and Current Interaction with Real Vegetation. Part 1:Guidelines for Physical Modeling", Coastal Engineering, 107, pp.70~83 (2016)
- 이성대, "연안식생에 의한 표사이동 특성에 관한 수치해석", 한국해양공학회지, 21(5), pp.18~24 (2007), 한국해양공학회
- 이성대, "파랑의 감쇠 특성을 고려한 해안림의 방재효과", 한국방재학회논문집, 14(5), pp.381~388 (2014), 한국방재학회
- 이성대, "식생모형에 의한 항로매몰 저감 특성", 한국항해항만학회지, 36(8), pp.659~664 (2012), 한국항해항만학회
- 이성대, "연성 식생모형에 의한 해빈침식방지 특성에 관한 실험적 연구", 한국해양공학회지, 23(1), pp.31~37 (2009), 한국해양공학회
- 이성대, "연안 습지식생에 의한 파랑감쇠 특성", 한국습지학회지, 18(1), pp.84~93 (2016), 한국습지학회
- Lee, W. D., "A Numerical Model Study on the Wave and Current Control by Coastal Vegetation", Journal of Coastal Research, 79, pp.219~223 (2017)
- 이우동, "쓰나미-식생 비선형 상호작용의 동적해석을 위한 3차원 수치파동수조의 적용", 대한토목학회논문집(국문), 36(5), pp.831~838 (2016), 대한토목학회[DOI]
- 이우동, "수리", 수치파동수조에서 안정적인 쓰나미 조파를 위한 고찰, 2016, pp.36(5), 805~817[DOI]
- Liu, H., "An Experimental Study on the Tsunami Boulder Movement", Proceedings of the 34th International Conference on Coastal Engineering (2014), ASCE
- Ma, G., "Numerical Study of Turbulence and Wave Damping Induced by Vegetation Canopies", Coastal Engineering, 80, pp.68~78 (2013)
- Maza, M., "Tsunami Wave Interaction with Mangrove Forests: A 3-D Numerical Approach", Coastal Engineering, 98, pp.33~54 (2015)
- Maza, M., "Large-Scale 3-D Experiments of Wave and Current Interaction with Real Vegetation. Part 2: Experimental Analysis", Coastal Engineering, 106, pp.73~86 (2015)
- Mendez, F. M., "An Empirical Model to Estimate the Propagation of Random Breaking and Nonbreaking Waves over Vegetation Fields", Coastal Engineering, 51, pp.103~118 (2004)
- Nouri, Y., "Experimental Investigation of Tsunami Impact on Free Standing Structures", Coastal Engineering Journal, 52(1), pp.43~70 (2010), JSCE
- Ohyama, T., "Development of a Numerical Wave Tank for Analysis of Non-linear and Irregular Wave Field", Fluid Dynamics Research, 8, pp.231~251 (1991)
- Park, H. S., "Tsunami Inundation Modeling in Constructed Environments:A Physical and Numerical Comparison of Free-Surface Elevation, Velocity, and Momentum Flux", Coastal Engineering, 79, pp.9~21 (2013)
- Park, J. R., "Numerical Analysis on Energy Dissipation of Tsunami through Vegetation Zone", Journal of Coastal Research, Special Issue, 79, pp.194~198 (2017)
- Qu, K., "Numerical Investigation of Tsunami-Like Wave Hydrodynamic Characteristics and Its Comparison with Solitary Wave", Applied Ocean Research, 63, pp.36~48 (2017)
- Raffel, M., "Particle Image Velocimetry: A Practical Guide", pp.253~ (1998), Springer Verlag
- Raffel, M., "Particle Image Velocimetry", pp.448~ (2007), Springer Verlag
- Rossetto, T., "Physical Modelling of Tsunami using a New Pneumatic Wave Generator", Coastal Engineering, 58, pp.517~527 (2011)
- Sakakiyama, T., "Numerical Simulation of Nonlinear Wave Interacting with Permeable Breakwater", Proceeding of the 23rd International Conference Coastal Engineering, pp.1517~1530 (1992), ASCE
- Hydraulic Model Experiment on the Artificial Seaweed against Scouring and Beach Erosion, "Sugahara, K.", Port and Airport Research Institute, 39~, pp.Technical Note of the Port and Airport Research Institute(PARI), 771 (1994)
- Suzuki, T., "Wave Dissipation over Vegetation Fields", Ph.D., pp.2011
- Tanino, Y., "Laboratory Investigation of Mean Drag in a Random Array of Rigid, Emergent Cylinders", Journal of Hydraulic Engineering, 134, pp.34~41 (2008)
- Yang, J. Y., "Wave Propagation with Vegetated Coastal Area", Master, pp.2008
- Wu, W. C., "Effects of Wave Steepness and Relative Water Depth on Wave Attenuation by Emergent Vegetation", Estuarine, Coastal and Shelf Science, 164, pp.443~450 (2015)
