珊瑚礁地形中波浪传播变形及增水模拟  

Simulation of wave propagation deformation and water setup in coral reef waters

作　　者：吕幸 季新然 Lv Xing;Ji Xinran(School of Civil Engineering and Architecture,Hainan University,Haikou 570228,China;Hainan Academy of Marine and Fishery Sciences,Haikou 571126,China)

机构地区：[1]海南大学土木建筑工程学院,海南海口570228 [2]海南省海洋与渔业科学院,海南海口571126

出　　处：《海南大学学报（自然科学版）》2023年第3期303-311,共9页Natural Science Journal of Hainan University

基　　金：国家重点研发计划课题(2019YFB1504304);国家自然科学基金(52261043);工信部项目([2019]357号)。

摘　　要：本文基于VRANS方程建立数值模型,将珊瑚礁表层简化为具有恒定孔隙率的多孔介质,模拟分析了在带有潟湖的珊瑚礁地形中不同入射波浪参数对礁坪上及潟湖中波高分布和增水效应的影响.结果表明,规则波浪在珊瑚礁地形上发生破碎后,在礁坪上波高明显降低;同时,在珊瑚礁多孔介质的作用下,增水效应最明显的位置位于礁坪上靠近礁缘处,入射波高和周期越大,在礁坪及潟湖中的波高分布和增水越大.研究结果对多孔礁体上的波浪变形和增水规律作出了解释,同时也为分析礁坪上构筑物出现失效和破坏的原因提供了参考.In the report,a numerical model was established based on the VRANS equation,and the surface lay-er of coral reef was simplified as a porous medium with constant porosity.The effects of the different incident wave periods and wave heights in the coral reef topography with lagoons on the wave height and water level en-hancement on the reef flat and in the lagoon were simulated and analyzed.The results showed that after the regu-lar wave breaks,the wave decreases obviously on the reef flat,and under the action of porous medium,the most obvious position of water enhancement effect is near the reef edge on the reef flat,the larger the wave height and period,the larger the wave and water level in the reef flat and lagoon.The results provide an explanation for the study of wave deformation and water setup on the porous reef,and set a reference for the analysis of the causes of failure and damage of structures on the reef flat.

关 键 词：多孔礁体 波浪传播 礁坪增水 潟湖 

分 类 号：O353.2[理学—流体力学]