Characterizing ship-induced hydrodynamics in a heavy shipping traffic waterway via intensified field measurements  

作　　者：Li-lei Mao Yi-mei Chen Xin Li 

机构地区：[1]Department of Port,Waterway and Coastal Engineering,Southeast University,Nanjing 211189,China

出　　处：《Water Science and Engineering》2020年第4期329-338,共10页水科学与水工程（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.51479035);the Scientific Research Foundation of the Graduate School of Southeast University(Grant No.YBPY1883).

摘　　要：Ship-induced hydrodynamics play an important role in shaping the cross-sectional profile of inland waterways and produce a large amount of pressure on the fluvial environment.This study aimed at quantifying the characteristics of ship-induced waves and currents in a heavy shipping traffic waterway via intensified field measurements conducted in the Changzhou segment of the Grand Canal,in Jiangsu Province,China.Based on the processed hydrodynamic data,waves and currents caused by single ships and multiple ships were investigated.For single ships,the shipinduced wave heights estimated with empirical formulas were not consistent with the observations.Categorized by the loading conditions of barges,the drawdown height was characterized by the ratio of ship speed to its limit speed.The maximum non-dimensional ship-induced wave height was parameterized by a nonlinear combination of the depth Froude number and a blockage coefficient.For multiple ships,when ships closely followed each other or interlaced each other's paths,it was difficult to characterize the superposition of several ship wakes.The magnitudes of current velocities induced by single ships and multiple ships were respectively nine and six times as large as those of natural flow.This may result in more severe sediment(re)suspension than natural flows.©2020 Hohai University.Production and hosting by Elsevier B.V.This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/).

关 键 词：Ship-induced waves DRAWDOWN Field measurements Current velocity Sediment(re)suspension Grand Canal 

分 类 号：U612[交通运输工程—船舶及航道工程]