摘要
河床粗化问题是推移质运动研究的重要组成部分,由于河床级配、水流条件、输沙级配、床面形态四者互为反馈,交互制约,该领域一直为研究前沿。本文回顾及评述了河床粗化试验研究中的河床粗化机理、推移质输沙率、输沙级配、粗化层表面形态、粗化层非均匀沙起动条件、粗化层泥沙级配沿径向分布、可动层内床沙垂向交换,以及粗化河床对"人工喂沙"的响应等八个关键科学问题。河床粗化涉及许多不确定未知因素,成体系的理论成果之所以不足,主要在于精密试验资料的匮乏。精密粗化试验是很难突破的瓶颈,跨学科交叉技术的应用和先进量测仪器的研发将是解决这一复杂问题的有力手段。
Riverbed armoring is one of the important topics on bedload motion study,which is the forefront of research because of the mutual feedback and interaction among the riverbed grading,flow condition,bedload gradation,and bed form.Eight key scientific problems were reviewed and commented in detail as riverbed armoring mechanism,bedload discharge,bedload gradation,armoring layer surface form,incipient condition of non-uniform sediment in armoring layer,armoring layer sediment gradation distribution along diameter direction,sediment vertical exchange in the movable layer,response of sediment feeding to armoring bed.The armoring process involves many indeterminate unknown factors,and it is very difficult to be solved completely in theory because of the short of precision test data.Precision river-bed armoring test is a choke point to be broken through in this subject,and it is pointed out that the combined method of application of interdisciplinary technology and development of advanced measurement instruments is a powerful aproach to solve the complicated issue of river-bed armoring.
作者
杨文俊
孟震
朱帅
YANG Wen-jun;MENG Zhen;ZHU Shuai(Key Laboratory of Rivers and Lakes Harnessing and Flood Control,Yangtze River Scientific Research Institute of CWRC,Wuhan 430010,China)
出处
《泥沙研究》
CSCD
北大核心
2019年第3期73-80,共8页
Journal of Sediment Research
基金
国家自然科学基金重大科研仪器研制项目(51527809)
国家重点研发计划项目(2018YFC0407600)
关键词
河床粗化过程输沙率
输沙级配
粗化层表面形态
床沙垂向交换
精密试验
river-bed armoring process
bedload discharge and gradation
surface morphology of armoring layer
bedload vertical exchange
precision experiment
作者简介
杨文俊(1966-),男,湖北应城人,博士,教授级高工,主要从事水力学及河流动力学、环境泥沙及生态水利等方面研究。E-mail:69182200@qq.com
