Local scour around submerged angled spur dikes under ice cover

作     者：Guowei Li Jueyi Sui Sanaz Sediqi Mauricio Dziedzic Guowei Li;Jueyi Sui;Sanaz Sediqi;Mauricio Dziedzic

作者机构：School of EngineeringUniversity of Northern British Columbia 

出 版 物：《International Journal of Sediment Research》 (国际泥沙研究(英文版))

年 卷 期：2023年第38卷第6期

页      面：781-793页

核心收录：

学科分类：081504[工学-水利水电工程] 080103[工学-流体力学] 08[工学] 080104[工学-工程力学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financial support from the Natural Sciences and Engineering Research Council of Canada (NSERC) under the Discovery Grant Program RGPIN-2019-04278 

主　　题：Ice cover Local scour Submerged spur dike Alignment angle 

摘      要：Local scour is a phenomenon leading to the localized lowering of the channel bed due to the imbalance of sediment *** spur dikes protrude into the natural channels,local scour could be *** estimation of local scour around spur dikes is crucial for the effectiveness of erosion control and prevention and habitat enhancement *** the current study,the correlations between the maximum scour depth and the overtopping ratio,spur dike dimensions,ice cover roughness,and grain size of the bed material are *** both open channel and ice-covered flow conditions,a variety of experiments were done in a large-scale outdoor flume with different experimental *** results revealed that the scour depths around submerged spur dikes increased with increases in the densimetric Froude number and the decreases in the overtopping ratio and alignment *** maximum scour depth around a submerged angled vertical wall spur dike is significantly affected by the presence of an ice cover on the water surface,namely,the rougher the cover,the deeper the scour *** on data collected from the laboratory experiments,an existing maximum scour depth estimation equation has been modified to consider the influence of the cover condition and the submergence *** calculated results showed high accuracy in estimation of the measured data.