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首页> 外文期刊>Geophysical Research Letters >Influence of 'defects'' on sorted bedform dynamics
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Influence of 'defects'' on sorted bedform dynamics

机译：“缺陷”对分类床形动力学的影响

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Bedforms with plan-view patterns consisting of long crests interrupted by defects occur ubiquitously in subaqueous and subaerial environments where they strongly influence flows and sediment transport. We explore how such patterns adjust to changes in the external forcing. We utilize a numerical model of a wide-spread, largescale seabed pattern, 'sorted bedforms,' examining their response to changes in wave forcing. Numerical experiments show that the pattern adjustment progresses through two stages characterized by defect propagation and defect creation, respectively, and that the rates of the initial stage, and therefore overall pattern adjustment, are determined by the initial defect density. All characteristics of the sorted bedforms are similarly influenced by the presence of defects. Although the processes of growth are likely to be different for other types of bedforms, it is reasonable to expect they will be similarly influenced by defects in pre-existing patterns.
机译：在水下和空中环境中，随处可见的平面图模式由缺陷造成的长波峰中断而形成，它们广泛地影响水流和沉积物的输送。我们探索了这种模式如何适应外部强迫的变化。我们利用一个广泛的大型海床模式“分类床形”的数值模型，研究它们对波浪强迫变化的响应。数值实验表明，图案调整分别经历了以缺陷传播和缺陷产生为特征的两个阶段，并且初始阶段的速率以及整个图案的调整取决于初始缺陷密度。缺陷的存在同样会影响分选床型的所有特性。尽管对于其他类型的床型而言，生长过程可能会有所不同，但可以合理预期它们也会受到现有模式缺陷的类似影响。

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