Journal of Tropical Oceanography >
Study on wave transformation and run-up around the three-dimensional barrier reef under the action of solitary waves
Copy editor: YIN Bo
Received date: 2024-05-23
Revised date: 2024-07-02
Online published: 2024-07-08
Supported by
National Key Research and Development Program of China(2021YFC3100500)
Science and Technology Innovation Program of Hunan Province, China(2022RC3034)
In this paper, the FUNWAVE-TVD (fully nonlinear wave model with total variation diminishing) numerical model based on the two-dimensional horizontal Boussinesq equations was used to simulate the wave propagation and run-up near a three-dimensional barrier reef. Firstly, the model was verified by existing physical experiments. Subsequently, the effects of different reef widths, gap widths and gap locations on wave transformation and run-up around the three-dimensional barrier reef were analyzed. The results show that the existence of reefs can effectively reduce the impact of solitary waves. As the width of the reef increases, wave height decreases more rapidly, and wave run-up around the whole island drops continuously. The values of run-up near the leeward side are very small and exhibit some variability. The run-up decline due to reefs around the central island coastline decreases as the reef width increases. As the gap width increases, the extend of wave height increase in the lagoon near the gap increases. The influence of the gap width on the run-up is evident within a certain range on the windward side of the central island. As the gap width increases, the run-up on the windward side of the central island increases in this area, and the maximum run-up shifts from bimodal to unimodal. Outside this range, wave run-up is almost unaffected by the gap width. As the angle between the direction of the incident wave and the gap increases, the extent of wave height increase in the lagoon near the gap decreases. Moreover, the change of the gap location only affects the run-up in the region close to the gap of the central island, and this affected region shifts towards the back of the gap as the angle between the direction of the incident wave and the gap increases.
Key words: Boussinesq equation; solitary waves; wave run-up; barrier reef
ZHONG Danni , YAO Yu , ZHOU Ting . Study on wave transformation and run-up around the three-dimensional barrier reef under the action of solitary waves[J]. Journal of Tropical Oceanography, 2025 , 44(2) : 39 -47 . DOI: 10.11978/2024107
图2 Briggs等(1995)试验中有代表性的测量位置自由液面高程随时间的变化a1—a4. H0 = 0.014m时4根浪高仪位置处自由液面高程的变化; b1—b4. H0 = 0.029m时4根浪高仪位置处自由液面高程的变化; c1—c4. H0 = 0.058m时4根浪高仪位置处自由液面高程的变化 Fig. 2 Time series of surface elevations at representative measurement positions in Briggs’ experiments (left column: H0 = 0.014 m; middle column: H0 = 0.029 m; right column: H0 = 0.058 m) |
[1] |
刘林平, 刘维杰, 孙志林, 2021. 珊瑚岛礁孤立波爬坡的平面二维数值模拟研究[J]. 海洋工程, 39(4): 96-103.
|
[2] |
杨笑笑, 姚宇, 郭辉群, 等, 2021. 礁面大糙率存在下孤立波传播变形及爬高实验研究[J]. 海洋学报, 43(3): 24-30.
|
[3] |
姚宇, 2019. 珊瑚礁海岸水动力学问题研究综述[J]. 水科学进展, 30(1): 139-152.
|
[4] |
姚宇, 蒋昌波, 2023. 珊瑚礁海岸水沙动力学[M]. 北京: 科学出版社 (in Chinese).
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
|
[15] |
|
[16] |
|
/
〈 |
|
〉 |