Control of a Single Energetic Event on the Long-term Depth of Closure
Control of a Single Energetic Event on the Long-term Depth of Closure
复制标题
单个能量事件对长期闭合深度的控制
DOI：
10.1142/9789811275135_0262
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Wang, Ping
中科院分区：
文献类型：
--
作者：
Royer, Elizabeth;Wang, Ping
闭合深度（depth of closure， DOC）是指海底高程变化不显著的最靠近陆地的向海深度。本文基于时间序列海滩-近海剖面确定了与近端高能风暴相关的短期DOC，并与佛罗里达海岸5个研究点的长期（20年）DOC进行了比较。在所有剖面位置，时间序列海滩-近海剖面显示明显的辐合，表明在风暴和长期尺度上都存在DOC。长期DOC与风暴DOC之间没有明显的一致关系，说明长期DOC不受单个高能风暴的直接控制。与长期DOC相比，短期风暴DOC在沿岸表现出更大的空间变化。研究地点的沿岸范围并不是影响沿岸变化的决定性因素。对DOC这样的关键参数进行微调，将对许多海岸工程和管理项目产生影响，例如海滩营养物的设计。
The depth of closure (DOC) is defined as the most landward depth seaward of which there is no significant change in bottom elevation. In this paper, the short-term DOC associated with a proximal energetic storm was determined based on time-series beach-offshore profiles and compared to the long-term (20-year) DOC at 5 study sites along Florida coast. At all the profile locations the time-series beach-offshore profiles showed an apparent convergence indicating the presence of a DOC at both the storm and long-term scales. There is no apparent and consistent relationship between the long-term DOC and storm DOC, suggesting that the long-term DOC is not directly controlled by a single energetic storm. The short-term storm DOC demonstrated a higher spatial variation alongshore, as compared to the long-term DOC. Alongshore extent of the study site is not a determining factor for longshore variation. Finetuning a crucial parameter like the DOC would have implications for many coastal engineering and management projects, such as the design of beach nourishment.