Assessment of Depth of Closure on a Nourished Beach: Terschelling, The Netherlands
Assessment of Depth of Closure on a Nourished Beach: Terschelling, The Netherlands
复制标题
评估滋养海滩的封闭深度：荷兰泰尔斯海灵岛
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
R. Nicholls
中科院分区：
文献类型：
--
作者：
S. Marsh;R. Nicholls
在长时间和大空间尺度上，根据其自主行为，研究了营养海滩的封闭深度。长期数据显示，沿岸的封闭深度是可变的，向西较浅，向东较深。在海岸中部放置海岸营养物后，封闭深度的空间变化发生了变化。最初，填充物放置处的封闭深度是最浅的。在填充后，随着时间的推移，这种效果逐渐减弱。本研究中观察到的封闭深度受酒吧行为的影响。填充物通过减少近海沙洲的迁移来影响观察到的闭合深度。在本研究中观测到的任何特定时间尺度的最大闭合深度都可以用Hallermeier（1981）的活动剖面深度极限公式很好地预测。总之，填土前的观测和Hallermeier（1981）为观测到的填土后闭合深度提供了一个有用的限制。对其他海滩营养项目的类似分析也会有用。
Depth of closure is studied on a nourished beach in the light of its autonomous behaviour over long temporal and large spatial scales. Long term data show that depth of closure is variable alongshore, being shallower to the west and deeper to the east. Following placement of a shore nourishment along the middle section of the coast, the spatial variation of depth of closure changes. Initially the depth of closure is shallowest where the fill was placed. With time after the placement of the fill, this effect diminishes. Depth of closure observed in this study is influenced by bar behaviour. The fill material affects the observed depths of closure by reducing offshore bar migration. Maximum depths of closure for any particular timescale observed in this study are well predicted by the Hallermeier (1981) formulation for the depth limit to the active profile. In conclusion, pre-flll observations and Hallermeier (1981) provide a useful limit to the observed post-fill depth of closure. Similar analysis of other beach nourishment projects would be useful.