Probabilistic-Deterministic Modelling of Swash Zone Morphology
Probabilistic-Deterministic Modelling of Swash Zone Morphology
复制标题
斜流带形态的概率-确定性建模
DOI：
10.1061/40926(239)21
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发表时间：
2007
期刊：
影响因子：
3.5
通讯作者：
J. Alsina
中科院分区：
文献类型：
--
作者：
T. Baldock;P. Son;P. Manoonvoravong;M. Barnes;J. Alsina
提出了一个随机波浪作用下冲淤带泥沙输移的概率-确定性模型，并将其应用于随机波浪作用下跨海岸海滩剖面变化的预测。对于增生的条件，包括一个随机波的方法是必不可少的准确表示护堤建设过程。该模型提供了很好的估计海滩体积的变化，小规模的实验室实验和沉积物过冲量的天然海滩。未来的建模改进进行了讨论，特别是包括前悬浮泥沙，泥沙回升和长波的影响。现场和实验室的数据表明，沉积物平流进入冲带远离岸比预测的经典冲的解决方案，这增加了上冲悬浮泥沙通量。相反，当薄层流层的厚度相对于水流深度变大时，可能发生的阻碍拾取可能会限制悬浮泥沙通量。
A probabilistic‐deterministic model for swash zone sediment transport is presented and applied to predict cross‐shore beach profile change under random waves. For accretionary conditions, inclusion of a random wave approach is essential for accurate representation of berm building processes. The model provides good estimates of beach volume changes for small scale laboratory experiments and sediment overwash volumes on a natural beach. Future modeling improvements are discussed, notably the inclusion of pre‐suspended sediment, sediment pickup and long wave influences. Field and laboratory data show that sediment is advected into the swash zone from much further offshore than predicted by the classical swash solution, which increases uprush suspended sediment flux. Conversely, backwash suspended sediment flux may be limited by hindered pickup which may occur when the thickness of the backwash sheet flow layer becomes large relative to the flow depth.