Tidal Bore Dynamics Around the Similar Right-Angle Shoreline in the Qiantang Estuary,China  

作　　者：WANG Qiu-shun PAN Cun-hong CHEN Fu-yuan 

机构地区：[1]Zhejiang Institute of Hydraulics and Estuary,Hangzhou 310020,China [2]Zhejiang Provincial Key Laboratory of Estuary and Coast,Hangzhou 310020,China

出　　处：《China Ocean Engineering》2022年第5期827-838,共12页中国海洋工程（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Grant Nos.42276176,51779228,and 41706099);the Zhejiang Province Public Welfare Technology Application Research Project(Grant No.LGF20E090003);the Science and Technology Project of Zhejiang Water Conservancy(Grant No.RB2001 and RB2121).

摘　　要：Tidal bores are a unique hydrodynamic phenomenon during flood tide in the Qiantang Estuary.The tidal bore propagation around the similar right-angle shoreline is rarely documented in tidal estuaries.To investigate tidal bores around this shoreline,a hydrodynamic model combined with a theoretical method is employed to reveal the characteristics of the bore propagation.The theoretical solution of the tidal bore intensity is deduced to illustrate the relationship of the incident tidal bores and the back-flow bores during the propagation.The hydrodynamic model based on shallow water equation is employed to perform the simulation of tidal bores in the estuary.Model results with respect to the bore height and the propagation speed of tidal bores have a favourable agreement with field data.The tidal bore dynamics in the neighborhood of the similar right-angle shoreline are elucidated.The characteristics of tidal bores in terms of water surface,velocity,bore steepness and the intensity are illustrated and the back-flow bore is analyzed by numerical and theoretical methods around the similar right-angle shoreline.The height of the back-flow bore relative to the incident tidal bore ranges from 1.05 to 1.77.Model result reveals that the ambient water depth and the shape of the similar right-angle shoreline are contributed to the back-flow bore formation.

关 键 词：back-flow bore numerical model shallow water equation Qiantang Estuary tidal bores 

分 类 号：P731.2[天文地球—海洋科学]