The shoreface-connected ridges along the central Dutch coast } part 2 : morphological modelling
The shoreface-connected ridges along the central Dutch coast } part 2 : morphological modelling
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荷兰中部海岸沿线的岸面连接的山脊}第 2 部分：形态建模
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Leo C. van Rijna
中科院分区：
文献类型：
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作者：
Jan W. H. van de Meenea;Leo C. van Rijna
长期（几十年，几个世纪）的形态学行为的滨面连接的山脊沿着荷兰中部海岸进行了研究与简化的建模方法，包括一个一维电流模型（Trenchflow），结合2DV形态动力学模型（Sutrench）。分析重点是单个沙洲的横截面，假设水运动和形态的相互作用可以被认为是局部现象。该模型用于相关过程的敏感性分析。本模型揭示了一个正反馈：预测的图式沙银行的增长，而没有阻尼，即使在高波。然而，使用观察到的流量响应，这与本文第1部分中描述的理论流量响应不同，实际增长率接近于零。模型显示，海脊在几年至几十年的时间尺度上是稳定的，而在几千年的时间尺度上则可被视为活跃的。经计算，海脊的迁移速度为1米/年。形态的时间尺度和迁移率对应于从地质重建的结果。# 2000爱思唯尔科技有限公司版权所有。
The long-term (decades, centuries) morphological behaviour of the shoreface-connected ridges along the central Dutch coast was studied with a simplified modelling approach, consisting of a 1D current model (Trenchflow), combined with a 2DV morphodynamic model (Sutrench). The analysis focused on a cross-section of a single sand bank, assuming that the interaction of the water motion and morphology could be considered a local phenomenon. The modelling was used for a sensitivity analysis of the relevant processes. The present model reveals a positive feedback: the schematized sand bank is predicted to grow, while there is no damping, even not during high waves. However, using the observed flow response, which differs from the theoretical flow response as described in Part 1 of this paper, actual growth rates are close to zero. The modelling shows that the ridges are stable on a time scale of years to decades, while they may be considered active on the time scale of thousands of years. Calculated migration rates of the ridges are in the order of 1m/yr. Morphological time scale and migration rate correspond to the results from a geological reconstruction. # 2000 Elsevier Science Ltd. All rights reserved.