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Experiments on flow velocity profiles in mountain river channels

文献类型：期刊论文

作者Peng, Jia2,3; Chen, Dong2,3; Liang, Shizhengxiong2,3; Tang, Rongcai1; Hu, Hong1; Wang, Hang1
刊名JOURNAL OF HYDROINFORMATICS
出版日期2024-06-06
卷号N/A
关键词flow resistance mountainous river channels subsurface flow velocity vertical profiles
DOI10.2166/hydro.2024.137
产权排序1
文献子类Article ; Early Access
英文摘要Research on the vertical profiles of flow velocity in mountainous river channels is limited, particularly in scenarios where complex bed geometries are absent. Due to the coarse roughness and seepage flow on streambeds composed of gravel, the conventional formulae for flow velocity profiles derived from fluvial river channels do not apply to mountainous river channels. Based on flume experiments with a bed packed with natural gravel and a slope ranging from 0.006 to 0.16, we derived a theoretical formula for flow velocity profiles. This new formula integrates the influence of the subsurface flow and velocity reduction near the water surface, demonstrating a strong alignment with measurements. Our findings indicate that for shallow water flow over rough bed surfaces, the turbulence intensity diminishes along the vertical direction in the near-bed region while remaining relatively constant in the upper water body. Contrary to conventional theories which attribute the increase in flow resistance and the decrease in sediment transport rates in mountainous river channels to form drag, our study emphasizes that the subsurface flow plays a significant role in the overall flow resistance of mountainous river channels and should not be overlooked.
WOS关键词STEEP STREAMS ; BED ROUGHNESS ; RESISTANCE ; TRANSPORT ; EVOLUTION
WOS研究方向Computer Science ; Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS记录号WOS:001240167200001
出版者IWA PUBLISHING
源URL[http://ir.igsnrr.ac.cn/handle/311030/205317]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者Chen, Dong
作者单位1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Peng, Jia,Chen, Dong,Liang, Shizhengxiong,et al. Experiments on flow velocity profiles in mountain river channels[J]. JOURNAL OF HYDROINFORMATICS,2024,N/A.
APA Peng, Jia,Chen, Dong,Liang, Shizhengxiong,Tang, Rongcai,Hu, Hong,&Wang, Hang.(2024).Experiments on flow velocity profiles in mountain river channels.JOURNAL OF HYDROINFORMATICS,N/A.
MLA Peng, Jia,et al."Experiments on flow velocity profiles in mountain river channels".JOURNAL OF HYDROINFORMATICS N/A(2024).

入库方式： OAI收割

来源：地理科学与资源研究所

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