Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR029979 |
Roughness calibration to improve flow predictions in coarse-bed streams | |
Robert I. Ferguson | |
2021-06-03 | |
发表期刊 | Water Resources Research
![]() |
出版年 | 2021 |
英文摘要 | Logarithmic and variable-power equations that use the bed D84 grain size as a roughness metric reproduce the general trend of flow resistance in streams with coarse beds, but they are unreliable for predictions in individual reaches. For site-specific application of these equations I propose that an effective roughness height can be calibrated by making a single flow measurement. I test this idea using published velocity-depth data for eight coarse-bed reaches of varied character. In 52 trials (8 reaches x 2 equations x 3 or 4 alternative calibration measurements) single-measurement calibration reduced the root-mean-square error in predicting velocity at all depths by up to 79% (median 66%) compared to using D84. This approach may be useful when prescribing environmental flows, estimating bankfull discharge, or predicting bedload transport in coarse-bed channels in which Manning's n is likely to vary considerably with discharge.. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/329735 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Robert I. Ferguson. Roughness calibration to improve flow predictions in coarse-bed streams[J]. Water Resources Research,2021. |
APA | Robert I. Ferguson.(2021).Roughness calibration to improve flow predictions in coarse-bed streams.Water Resources Research. |
MLA | Robert I. Ferguson."Roughness calibration to improve flow predictions in coarse-bed streams".Water Resources Research (2021). |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
查看访问统计 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Robert I. Ferguson]的文章 |
百度学术 |
百度学术中相似的文章 |
[Robert I. Ferguson]的文章 |
必应学术 |
必应学术中相似的文章 |
[Robert I. Ferguson]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论