Direct solution for discharge in circular free overfall

被引：16

作者：

Ahmad, Z. ^{[2
]}

Azamathulla, H. Md ^{[1
]}

机构：

[1] Univ Sains Malaysia, River Engn & Urban Drainage Res Ctr REDAC, Nibong Tebal 14300, Pulau Pinang, Malaysia

[2] Indian Inst Technol, Dept Civil Engn, Roorkee 247667, Uttar Pradesh, India

来源：

JOURNAL OF HYDROLOGY | 2012年 / 446卷

关键词：

Open channel flow; Flow measurement; Circular channel; Steady flow; Weirs; Pressure distribution; END-DEPTH;

D O I：

10.1016/j.jhydrol.2012.04.025

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Free overfall at the end of a circular channel is simulated as sharp-crested weir with zero height to get end-depth-discharge relationship. A closed-form equation for discharge in terms of end depth for subcritical flows is proposed and verified with the experimental data. Computed discharges show excellent matching with the observed data. Direct solution for discharge for known end depth, channel bed slope, and Manning's coefficient is provided in the graphical form for supercritical flow. Verification of this solution with the available experimental data revealed that computed discharges are within +/- 12% of the observed discharges. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：116 / 120

页数：5

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