The Impact of Waves and Tides on Residual Sand Transport on a Sediment‐Poor, Energetic, and Macrotidal Continental Shelf
The Impact of Waves and Tides on Residual Sand Transport on a Sediment‐Poor, Energetic, and Macrotidal Continental Shelf
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波浪和潮汐对沉积物贫乏、充满活力和大潮汐大陆架上的残余沙运移的影响
DOI：
10.1029/2018jc014861
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
T. Scott
中科院分区：
文献类型：
--
作者：
E. King;Daniel Conley;G. Masselink;N. Leonardi;R. McCarroll;T. Scott
©2019。作者。充满活力，macrotidate货架关闭西南英格兰被用来调查不同的潮汐和波浪条件和它们之间的相互作用对区域沙输运模式的影响，使用耦合的水动力，波浪和泥沙输运模型。余流和沉积物输运模式对于沿岸的和陆架-海沉积物的输运和分布、海岸和内大陆架区的形态演变以及海岸规划都很重要。波浪严重地影响了在这种大潮汐环境中的泥沙输运。中位（50%波动率）波增强潮汐方向的运输。极端（1%的波动）波可以扭转主导的运输路径，转移的主导运输阶段从涨潮到落潮，并激活沙运输低于120米的深度。波-潮相互作用（包括辐射应力、斯托克漂移、增强的底摩擦和床剪切应力、折射、电流引起的多普勒频移和波阻塞）显著地和非线性地增强沙输运，这由耦合、仅波和仅潮模拟之间的差异输运确定。基于波浪、潮汐和非线性波潮相互作用引起的输沙量，提出了一种新的大陆架分类方案。不同的波/潮条件之间的分类变化有影响的沙输运方向和分布在整个大陆架。非线性相互作用主导的极端波在整个大部分的大潮汐架的春天沙输运。在小潮时，非线性相互作用驱动下的中值和极端波沙运输的显着比例，尽管可以忽略不计的潮汐引起的运输。这强调了迫切需要考虑波潮相互作用时，考虑在全球充满活力的环境中的输沙，以前潮汐单独或非耦合波被认为是。
©2019. The Authors. The energetic, macrotidal shelf off South West England was used to investigate the influence of different tide and wave conditions and their interactions on regional sand transport patterns using a coupled hydrodynamic, wave, and sediment transport model. Residual currents and sediment transport patterns are important for the transport and distribution of littoral and shelf-sea sediments, morphological evolution of the coastal and inner continental shelf zones, and coastal planning. Waves heavily influence sand transport across this macrotidal environment. Median (50% exceedance) waves enhance transport in the tidal direction. Extreme (1% exceedance) waves can reverse the dominant transport path, shift the dominant transport phase from flood to ebb, and activate sand transport below 120-m depth. Wave-tide interactions (encompassing radiation stresses, Stoke's drift, enhanced bottom-friction and bed shear stress, refraction, current-induced Doppler shift, and wave blocking) significantly and nonlinearly enhance sand transport, determined by differencing transport between coupled, wave-only, and tide-only simulations. A new continental shelf classification scheme is presented based on sand transport magnitude due to wave-forcing, tide-forcing, and nonlinear wave-tide interactions. Classification changes between different wave/tide conditions have implications for sand transport direction and distribution across the shelf. Nonlinear interactions dominate sand transport during extreme waves at springs across most of this macrotidal shelf. At neaps, nonlinear interactions drive a significant proportion of sand transport under median and extreme waves despite negligible tide-induced transport. This emphasizes the critical need to consider wave-tide interactions when considering sand transport in energetic environments globally, where previously tides alone or uncoupled waves have been considered.
影响因子：
2.3
作者：
C. Thompson;M. E. Williams;L. Amoudry;T. Hull;S. Reynolds;Anouska Panton;G. Fones
通讯作者：
C. Thompson;M. E. Williams;L. Amoudry;T. Hull;S. Reynolds;Anouska Panton;G. Fones
影响因子：
3.9
作者：
Olivier Burvingt;G. Masselink;P. Russell;T. Scott
通讯作者：
Olivier Burvingt;G. Masselink;P. Russell;T. Scott