【摘要】 本文对处于淤交替 (粗化细化 )过程下的宽级配非均匀沙起动特点进行了分析 ,文中首先探讨了均匀沙起动流速的表达方式 ,然后引入非均匀沙暴露高度和泥沙粒径的关系和研究成果 ,导出了宽级配非均匀沙分级起动流速的计算公式 ,通过实验资料检验符合良好。更多还原

【Abstract】 In this paper, the incipient motion characteristics of sediment with a wide distribution under the condition of armoring process of bed material are discussed. The formula of critical velocity is derived. The relationship of exposure degree and bed material diameter and equivalent diameter of non-uniform sediment are introduced to determine critical velocity of sediment with a wide size distribution, which agrees with the experimental data well.更多还原