沙波与刚性非淹没植物复合床面推移质泥沙输移特性研究  

Study on Sediment Transport Characteristics of Compound Bed Form Combined of Unsubmerged Rigid Vegetation and Sand Dunes

作　　者：叶志恒 唐立模[2] 倪培桐[1] 苗青[1] YE Zhi-heng;TANG Li-mo;NI Pei-tong;MIAO Qing(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510610 [2]河海大学水利水电学院,江苏南京210098

出　　处：《水电能源科学》2023年第5期43-47,共5页Water Resources and Power

基　　金：广东省水利科技创新项目(2021-07)。

摘　　要：鉴于复合床面条件下刚性非淹没植物改变推移质输沙特性的相关研究成果较少,为此采用水槽试验和理论分析方法,研究了平行排列的刚性非淹没植物对泥沙起动谢尔兹数和推移质输沙强度的影响。结果表明,平行排列的刚性非淹没植物使得泥沙起动谢尔兹数增大了97.2%,推移质输沙率降低了80%以上。通过理论分析提出了适用于刚性非淹没植物平行排列条件下恩格隆推移质输沙率公式,经验证该公式具有较高的精确度。The bedload sediment transport in the compound channel is affected by the presence of emergent rigid vegetation,and there were few studies available on this topic.The laboratory experiments and theoretical analysis were used to investigate the effect of emergent rigid vegetation in parallel arrangement on the threshold Shields number and the bedload transport intensity.The results show that the presence of emergent rigid vegetation in parallel arrangement increased the threshold Shields Number by 97.2%,and the bedload transport intensity reduced by more than 80%.The modified Engelund Formula that was applicable to the emergent rigid vegetation in parallel arrangement conditions was developed to calculate the bedload transport intensity.The formula was shown to have a high accuracy by applying it to the other studies.

关 键 词：沙波 刚性非淹没植物 复合床面 推移质泥沙 输移特性 

分 类 号：TV143[水利工程—水力学及河流动力学]