A Numerical Study on the Responses of Wave-Driven Circulation to Varying Incident Wave Forcing and Reef Morphology in A Reef-Lagoon-Channel System  

作　　者：YAO Yu WU Ji LI Jiang-xia CHEN Long 

机构地区：[1]School of Hydraulic and Environmental Engineering,Changsha University of Science and Technology,Changsha 410114,China [2]Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province,Changsha 410114,China

出　　处：《China Ocean Engineering》2022年第6期933-946,共14页中国海洋工程（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.51979013 and 51909013);the National Key Research and Development Program of China(Grant Nos.2021YFC3100502 and 2021YFB2601104).

摘　　要：Wave-driven circulation in a reef-lagoon-channel system has significant ecological,geomorphological,and environmental implications.However,there is still research gap in fully understanding the responses of wave-driven circulation in the system to varying incident wave forcing and reef morphology.To better interpret the wave-current process inside an idealized reef-lagoon-channel configuration,a numerical model based on the horizontally two-dimensional(2DH)fully nonlinear Boussinesq equations is presented in this study.The adopted model is firstly validated by a published laboratory dataset for wave height,wave setup and mean current in the system.Subsequently,the impacts of wave forcing(incident wave height,incident wave period,reef-flat wave level)and reef morphological(fore-reef slope,cross-shore reef-flat width,channel width,reef roughness)factors that are not fully considered in the previous laboratory studies are reported through the numerical simulations in this study.Finally,the model is applied to analyze the wave pump efficiency parameter in the system,and an empirical equation to predict this parameter is also proposed.

关 键 词：wave-induced setup circulation cell coral reef wave pump efficiency Boussinesq equations 

分 类 号：TV139.2[水利工程—水力学及河流动力学] P75[天文地球—海洋科学]