The Investigation of Morphology Change Effects on Runup based on 2D Wave Flume Experiment
The Investigation of Morphology Change Effects on Runup based on 2D Wave Flume Experiment
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基于二维波水槽实验的形态变化对助跑影响的研究
DOI：
10.2112/si85-205.1
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发表时间：
2018
影响因子：
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通讯作者：
Lee Dong Young
中科院分区：
文献类型：
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作者：
Xu Zhaoyan;Li Huajun;Liang Bingchen;Lee Dong Young
摘要徐Z.；李，H。梁 B. 和 Lee, D.Y., 2018. 基于二维波槽实验的形态变化对助跑影响的研究。载于：Shim，J.-S.； Chun, I. 和 Lim, H.S. （编辑），2018 年国际海岸研讨会 (ICS) 论文集（韩国釜山）。沿海研究杂志，特刊第 85 号，第 1021–1025 页。椰子溪（佛罗里达），ISSN 0749-0208。冲刷区的高速冲刷运动和波浪爬升引起了海滩的高度形态动态变化，这与沙丘侵蚀密切相关。在目前的工作中，通过对二维波水槽的室内实验分析来研究波浪爬升过程。使用侧视摄像机记录旋转盘形状随时间的变化。从视频图像分析获得助跑高度。波浪解析模型（XBeach 模型）还用于通过使用海上实验室水动力数据准备输入边界条件来模拟波浪爬升高度。与实验室实验获得的波浪爬升结果相比，XBeach 的性能是可以接受的，但 Rmax 和设置 η 随底部变化的变化趋势表现出一些差异。通过分析不同时刻的助跑成分（波浪起位 η 和冲浪 S）和入射波高度，讨论了底部坡度变化（不同的前岸坡度和沙坝发育）对波浪助跑的影响，结果表明形态变化通过影响入射水动力对波浪助跑高度有着不可忽视的影响，并且波浪助跑高度和波浪助起高度 η 随着沙坝顶的增大而减小。
ABSTRACT Xu, Z.; Li, H.; Liang, B., and Lee, D.Y., 2018. The investigation of morphology change effects on run-up based on 2D wave flume experiment. In: Shim, J.-S.; Chun, I., and Lim, H.S. (eds.), Proceedings from the International Coastal Symposium (ICS) 2018 (Busan, Republic of Korea). Journal of Coastal Research, Special Issue No. 85, pp. 1021–1025. Coconut Creek (Florida), ISSN 0749-0208. The high speed swash motion and wave runup in swash zone induce high morphology dynamic change at the beach, which is closely related to dune erosion. In the present work, the process of wave runup was investigated through the analysis of laboratory experiment at 2D wave flume. The time variations of swash shape were recorded by using side-looking camera camera. Runup heights were obtained from the video image analysis. The wave resolving model, XBeach model, is also used to simulate wave runup height by preparing the input boundary conditions using the laboratory hydrodynamic data at offshore. Compared to the wave run-up results obtained from laboratory experiment, the performance of XBeach is acceptable but shows some difference on the trends of Rmax and setup η changing with bottom change. The effects of bottom slope change (different forshore slope and sand bar developement) on the wave runup are discussed through analysing runup components (wave setup η and swash S) and incident wave height at different time, which shows the morphology change has unneglected effects on wave runup height by affecting the incident hydrodynamics, and the wave runup height and setup η decrease with the increasement of sandbar crest.