E3S Web Conf.
Volume 260, 20212021 International Conference on Advanced Energy, Power and Electrical Engineering (AEPEE2021)
|Number of page(s)
|Electrical Engineering and Automation
|19 May 2021
Error analysis of hydraulic radius evaluation in hydraulic calculation
1 Hubei Key Laboratory of Intelligent Yangtze and Hydroelectric Science, China Yangtze Power Co., Ltd, Yichang, Hubei Province, China
2 State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, China Institute of Water Resources and Hydropower Research, Beijing, China
* Corresponding author: email@example.com
Hydraulic radius is an important parameter in hydraulic calculation. It is often deemed that hydraulic radius can be replaced by the cross-sectional average water depth when the width to depth ratio (B/H) is greater than a certain value in traditional. Based on the various artificial cross-section and natural ones, value-taking errors of hydraulic radius are studied in this paper. The results show that it is feasible to adopt the average water depth as the hydraulic radius when B/H of rectangular section is larger than 40 or B/H of isosceles triangular section is larger than 12. But for natural river, B/H is different when water level changes and there is no single-valued corresponding relationship between relative error and B/H. Therefore, we advise that hydraulic radius could not be replaced by other variables in hydraulic calculation of natural rivers.
© The Authors, published by EDP Sciences, 2021
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