文章基本信息

标题：Error analysis of hydraulic radius evaluation in hydraulic calculation
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作者：Ye Yin ; Dangwei Wang ; Hantao Wang 等
期刊名称：E3S Web of Conferences
印刷版ISSN：2267-1242
电子版ISSN：2267-1242
出版年度：2021
卷号：260
页码：1-8
DOI：10.1051/e3sconf/202126003016
语种：English
出版社：EDP Sciences
摘要：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 whenB/Hof rectangular section is larger than 40 orB/Hof isosceles triangular section is larger than 12. But for natural river,B/His different when water level changes and there is no single-valued corresponding relationship between relative error andB/H. Therefore, we advise that hydraulic radius could not be replaced by other variables in hydraulic calculation of natural rivers.