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Discharge Formula and Hydraulics of Rectangular Side Weirs in the Small Channel and Field Inlet

文献类型： 外文期刊

作者： Wang, Yingying 1 ; Lv, Mouchao 1 ; Wang, Wen'e 3 ; Meng, Ming 4 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Farmland Irrigat, Xinxiang 453002, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Water Saving Irrigat Engn, Xinxiang 453002, Peoples R China

3.Northwest A&F Univ, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Area, Xianyang 712100, Peoples R China

4.Yellow River Engn Consulting Co Ltd, Zhengzhou 450003, Peoples R China

关键词： rectangular side weir; discharge coefficient; Froude number; flow velocity; flow pressure

期刊名称：WATER （ 影响因子：3.4； 五年影响因子：3.5 ）

ISSN：

年卷期： 2024 年 16 卷 5 期

页码：

收录情况： SCI

摘要： In this study, experimental investigations were conducted on rectangular side weirs with different widths and heights. Corresponding simulations were also performed to analyze hydraulic characteristics including the water surface profile, flow velocity, and pressure. The relationship between the discharge coefficient and the Froude number, as well as the ratios of the side weir height and width to upstream water depth, was determined. A discharge formula was derived based on a dimensional analysis. The results demonstrated good agreement between simulated and experimental data, indicating the reliability of numerical simulations using FLOW-3D software (version 11.1). Notably, significant fluctuations in water surface profiles near the side weir were observed compared to those along the center line or away from the side weir in the main channel, suggesting that the entrance effect of the side weir did not propagate towards the center line of the main channel. The proposed discharge formula exhibited relative errors within 10%, thereby satisfying the flow measurement requirements for small channels and field inlets.

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