Flume Experiment Investigation on Propagation Characteristics of Tidal Bore in A Curved Channel  

作　　者：FAN Jun TAO Ai-feng SHI Mo-quan LI Ying PENG Ji 

机构地区：[1]Key Laboratory of Ministry of Education for Coastal Disaster and Protection,Hohai University,Nanjing 210098,China [2]College of Harbour,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China [3]The Adminstrative Committee of Nantong Haimen Sanchang Industrial Park,Nantong 226121,China [4]Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China [5]China Renewable Energy Engineering Institute,Beijing 100120,China

出　　处：《China Ocean Engineering》2023年第1期131-144,共14页中国海洋工程（英文版）

基　　金：supported by the National Key Research and Development Program of China (Grant No.2022YFE0104500);the National Natural Science Foundation of China (Grant No. 52271271);the National Natural Science Foundation of China (Grant No. 41906183);the National Natural Science Foundation of China (Grant No.52101308);the Fundamental Research Funds for the Central Universities (Grant No.B220202080)。

摘　　要：Tidal bore is a special and intensive form of flow movement induced by tidal effect in estuary areas, which has complex characteristics of profile, propagation and flow velocity. Although it has been widely studied for the generation mechanism, propagation features and influencing factors, the curved channel will complicate the characteristics of tidal bore propagation, which need further investigation compared with straight channel. In this study, the flume experiments for both undular and breaking bores’ propagation in curved channel are performed to measure the freesurface elevation and flow velocity by ultrasonic sensors and ADV respectively. The propagation characteristics,including tidal bore height, cross-section surface gradient, tidal bore propagation celerity, and flow velocity are obtained for both sides of the curved channel. And three bore intensities are set for each type of tidal bores. The freesurface gradients are consistently enlarged in high-curvature section for undular and breaking bores, but have distinct behaviors in low-curvature section. The spatial distributions of tidal bore propagation celerity and flow velocity are compared between concave and convex banks. This work will provide experimental reference for engineering design of beach and seawall protection, erosion reduction and siltation promotion in estuary areas with the existence of tidal bores.

关 键 词：tidal bore curved channel flume experiment propagation celerity bore intensity 

分 类 号：P75[天文地球—海洋科学]