摘要
引水渠是一种常见的河道分流形式,由于主河道与引水渠之间往往有一定的夹角,水流从分汊前主河道流入引水渠时必然在一定的范围内发生一定程度的弯曲,其结果是有利于较多较粗的泥沙分入引水渠,导致渠道口门产生较为严重的淤积现象,而渠道口门淤积问题是决定引水工程是否成败的主要因素之一。通过一维非恒定流水沙数学模型,研究了不同水沙条件下引江济汉工程引水渠道口门泥沙淤积厚度变化规律,并分析了糙率对口门淤积厚度的影响情况,模型的计算结果与水流运动规律相吻合,可以为渠道引水防沙设计提供技术支持。
Sediment accumulation in water diversion canal is the main factor to determine whether water transfer project is successful. One dimensional flow and sediment mathematics model of river unsteady flow is used to study the change rule of the sediment depth at the gate of the water diversion canal of the Yangtze River to Hart River water transfer project in different water sediment conditions; the influences of different roughness coefficients on the sediment accumulation depth are also analyzed. The calculation results of the model accord with data observed, .so it can provide technical support for water diversion and sediment control design of the project.
出处
《中国农村水利水电》
北大核心
2007年第12期79-81,84,共4页
China Rural Water and Hydropower
基金
国家重点基础研究项目("973"项目)资助(2003CB415200)
国家自然科学基金项目资助(50579054)
关键词
引水渠道
泥沙淤积
防沙
water diversion canal
sediment accumulation
sediment control
