摘要
利用量纲分析原理讨论了黄河中下游河道各种水力要素及边界条件对推移质输沙率的影响,建立了反映河床形态因子的综合无量纲水流强度指标,同时分析了各水流强度指标与推移质泥沙输移强度的相关关系。结果表明:无量纲综合水流切应力指标和无量纲综合水流功率指标均与推移质泥沙输移强度有较好的相关性;在水流强度很低、无量纲水流功率综合指标W*2<600时,水流功率综合指标与推移质输移强度的关联度有一定的波动性;随着水流强度增大,无量纲水流功率综合指标600<W*2<7 000时,水流功率综合指标与推移质输移强度有着较好的关联度。
Based on dimensional analysis principle, the influence on the bed load transport rate had been discussed by several hydraulic elements and boundary conditions. The dimensionless comprehensive flow intensity index, reflecting river bed form factor, had been established, and rela- tionship between flow intensity and bed load transport intensity had been analyzed. Analysis shows that both dimensionless comprehensive flow shear stress index and flow power index have a better correlation with the dimensionless bed load transport intensity. When the flow strength is low, di- mensionless composite flow power index W1＊ 〈 600, the relevance between flow power index and bed load transport intensity have some fluctuating. When the flow strength is increase, dimensionless composite flow power index 600 〈 Wm＊ 〈 7 000, the relevance between flow power index and bed load transport intensity have a good agreement.
出处
《人民黄河》
CAS
北大核心
2013年第12期24-26,共3页
Yellow River
基金
国家自然科学基金资助项目(51039004
51079055)
关键词
无量纲综合因子
水流强度指标
输移特性
推移质泥沙
黄河中下游
dimensionless comprehensive factor
flow intensity index
transportation characteristic
bed load
Middle and Lower Yellow River
