Vegetated foredunes are widespread aeolian landforms along wave‐dominated sandy coasts. In contrast to previous advances in dune erosion during storm surges, there is a little empirical data and understanding of aeolian processes during foredune recovery and growth. Based on a comprehensive data set (airflow, sand transport, topography change, and vegetation cover) collected across a steep (1:2.5, 21.8°), high (20 m) foredune during a windy 5‐week period at Egmond aan Zee, the Netherlands, we demonstrate in agreement with previous studies that shore‐perpendicular winds accelerate by a factor of 3 from dune foot to crest but result in low aeolian mass fluxes that are maximum at the dunefoot, favoring local deposition. In contrast, oblique and alongshore winds up the foredune are accelerated less (or even decelerate) but are important in bringing sand from the dunefoot on to the foredune slope, where it is deposited when vegetation cover exceeds about 50% of the maximum density measured on the dune crest. Moreover, our data suggest that sediment flux at the dune foot is limited by fetch‐induced sediment availability, whereas sediment flux at the dune crest is limited by transport capacity, which depends on the wind velocity and the distance traveled over vegetation. Our study thus highlights the importance of wind direction and vegetation cover to foredune growth and recovery.

中文翻译：

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穿越植被的Foredune斜坡的风沙运输

植被的禁区是波浪主导的沙​​质海岸上广泛分布的风沙地貌。与风暴潮期间沙丘侵蚀的先前进展相比，在前缘恢复和生长期间有一些经验数据和对风沙过程的了解。根据在有风的5周时间内从Egmond aan Zee的陡峭（1：2.5，21.8°），高（20 m）的山丘上收集的综合数据集（气流，沙粒运输，地形变化和植被覆盖），在荷兰，我们与先前的研究一致表明，从沙丘脚到波峰，海岸垂直风的风速增加了3倍，但导致风沙质量通量较低，在沙丘脚处最大，有利于局部沉积。相反，向前倾斜倾斜和沿岸的风的加速度较小（甚至减速），但对于将沙土从沙丘脚带到前沙丘坡上非常重要，当植被覆盖度超过沙丘顶上测得的最大密度的50％时，沙丘会沉积在沙丘上。 。此外，我们的数据表明，沙丘脚底的泥沙通量受获取的沉积物可利用性的限制，而沙丘顶峰的沙土通量则受运输能力的限制，运输能力取决于风速和在植被上的传播距离。因此，我们的研究凸显了风向和植被覆盖对甲虫生长和恢复的重要性。我们的数据表明，沙丘脚底的泥沙通量受取水诱导的泥沙供应量的限制，而沙丘顶峰上的沙尘通量则受运输能力的限制，运输能力取决于风速和在植被上的传播距离。因此，我们的研究凸显了风向和植被覆盖对甲虫生长和恢复的重要性。我们的数据表明，沙丘脚底的泥沙通量受取水诱导的泥沙供应量的限制，而沙丘顶峰上的沙尘通量则受运输能力的限制，运输能力取决于风速和在植被上的传播距离。因此，我们的研究凸显了风向和植被覆盖对甲虫生长和恢复的重要性。