Experimental study of near-bed concentration and sediment vertical mixing parameter for vertical concentration distribution in the surf zone |
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| Authors: | Yang Zhang Zhili Zou Wushan Xue Dapeng Sun |
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| Affiliation: | 1. Industry-Academia Collaboration Foundation, Chonbuk National University, 567 Baejedae-ro, Deokjin-gu, Jeonju, 54896, Republic of Korea;2. Center for Jeongeup Industry-Academy Cooperation, Chonbuk National University, 9 Cheomdan-ro, Jeongeup, Jeonbuk, 56212, Republic of Korea;1. Polish Academy of Sciences, Institute of Geography and Spatial Organization, Research Station in Szymbark, 38-311 Szymbark 430, Poland;2. Polish Academy of Sciences, Institute of Geography and Spatial Organization, Department Polish Academy of Sciences, Institute of Geography and Spatial Organization, Department of Geoenvironmental Research, Św. Jana 22, 31-018 Kraków, Poland;3. The Jan Kochanowski University, Institute of Geography and Environmental Sciences, Uniwersytecka 7, 25-406 Kielce, Poland;4. Bar-Ilan University, Department of Geography and Environment, Ramat-Gan, 5290002 Israel;1. School of Engineering, University of Guelph, Guelph, ON N1G 2W1, Canada;2. School of the Built Environment, Heriot-Watt University, Edinburgh, UK;3. Department of Geography and Planning, School of Environmental Sciences, University of Liverpool, Liverpool, UK;4. Department of Geography, University of Lincoln, Lincoln, UK;1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin (SKL-WAC), Beijing, China;2. China Institute of Water Resources and Hydropower Research (IWHR), Beijing, China;3. Surveying Design and Research Institute of Yellow River Henan Province, Zhengzhou, China;4. Jingjiang Bureau of Hydrology and Water Resources Survey, Changjiang Water Resources Commission, Jingzhou, China;1. Faculty of Geology, VNU University of Science, Vietnam National University, Hanoi 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam;2. Faculty of Marine and Coastal Engineering, Thuyloi University, 175 Tay Son, Dong Da, Hanoi, Vietnam;3. SedTrend Analysis Limited, 7236 Peden Lane, Brentwood Bay, BC, Canada V8M1C5;4. Faculty of Meteorology, Hydrology and Oceanography, VNU University of Science, Vietnam National University, Hanoi, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam |
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| Abstract: | Two formulae for the near-bed concentration(C_a) and the sediment vertical mixing parameter(m) are established based on a large scale wave flume experiment.The advantage of the new formulae is that the turbulent kinetic energy induced by wave breaking can be taken into account;the formula for C_a is in terms of the near-bed,time-averaged turbulent kinetic energy,and the formula for m is in terms of depth-and time-averaged turbulent kinetic energy.A new expression for suspended sediment load also is established by depth integration of the vertical distribution of the suspended sediment concentration obtained on basis of the new formulae.Equation validation is done by comparing the predicted C_a and m to measurements for different types of waves(regular wave,wave group,and irregular wave),and good agreement is found.The advantages of the proposed formulae over previous formulae also are discussed. |
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| Keywords: | Near-bed concentration Sediment vertical mixing parameter Turbulent kinetic energy Surf zone Wave type |
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