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タイトル: | Parameterization of time-averaged suspended sediment concentration in the nearshore |
著者: | Yoon, Hyun Doug Cox, Daniel Mori, Nobuhito https://orcid.org/0000-0001-9082-3235 (unconfirmed) |
著者名の別形: | 森, 信人 |
キーワード: | turbulence suspended sediment concentration surf zone wave breaking |
発行日: | 6-Nov-2015 |
出版者: | MDPI AG |
誌名: | Water |
巻: | 7 |
号: | 11 |
開始ページ: | 6228 |
終了ページ: | 6243 |
抄録: | To quantify the effect of wave breaking turbulence on sediment transport in the nearshore, the vertical distribution of time-averaged suspended sediment concentration (SSC) in the surf zone was parameterized in terms of the turbulent kinetic energy (TKE) at different cross-shore locations, including the bar crest, bar trough, and inner surf zone. Using data from a large-scale laboratory experiment, a simple relationship was developed between the time-averaged SSC and the time-averaged TKE. The vertical variation of the time-averaged SSC was fitted to an equation analogous to the turbulent dissipation rate term. At the bar crest, the proposed equation was slightly modified to incorporate the effect of near-bed sediment processes and yielded reasonable agreement. This parameterization yielded the best agreement at the bar trough, with a coefficient of determination R2 ≥ 0.72 above the bottom boundary layer. The time-averaged SSC in the inner surf zone showed good agreement near the bed but poor agreement near the water surface, suggesting that there is a different sedimentation mechanism that controls the SSC in the inner surf zone. |
著作権等: | © 2015 by the authors. This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
URI: | http://hdl.handle.net/2433/214453 |
DOI(出版社版): | 10.3390/w7116228 |
出現コレクション: | 学術雑誌掲載論文等 |
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