Study on the transport of suspended sediment in an open channel flow with permeable spur dikes

作     者：Ryosuke AKAHORI Syunsuke IKEDA 

作者机构：Civil Engineering Research Institute for Cold RegionPublic Works Research InstituteJapan CTI Engineering Co.Ltd.JapanTokyo Institute of TechnologyJapan 

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

年 卷 期：2011年第26卷第1期

页      面：96-111页

核心收录：

学科分类：08[工学] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 

基　　金：supported by the Ministry of Education Science Sports and Culture’s Grant-in-Aid for Young Scientists (B) 21760383 2009 

主　　题：Suspended sediment Permeable spur dike Eddy structure Velocity distribution Power spectrum 

摘      要：The transport of suspended sediment in rivers with spur dikes is an important issue for bank protection and environmental *** experiments were performed to study the characteristics of the flow and the transport of suspended sediment in an open channel with permeable ***,the essentials of these characteristics were studied by comparing results of flume experiments on permeable and impermeable *** influence of the aspect ratio(d/l) of the interval between dikes(d) to the length of dikes(l) on these characteristics was then *** these experiments,the properties of horizontal eddies,turbulence structures,and suspended sediment concentrations were *** results show that the development of large-scale horizontal eddies requires some distance in a shear layer for permeable dikes,although they are periodically generated from the first dike in the case of impermeable *** basic structures of horizontal eddies are independent of the aspect ratio in the equilibrium region for permeable *** suspended sediment concentrations for cases of permeable dikes gradually decrease between the several upstream dikes and they approach a uniform distribution in the downstream region,although those in the case of the impermeable dikes are relatively uniform in the downstream direction.