Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026756 |
Application of hydraulic geometry to high gradient rivers in southern Ecuador | |
V. M. Carrillo; J. E. Petrie; F. E. Cisneros; L.M. Timbe | |
2021-02-24 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | Using hydraulic geometry (HG) theory, we investigated three rivers typical of the Ecuadorian mountainous region with longitudinal slopes ranging from 0.8% to 10% and coarse bed material with d50 ranging from 3 to 54 mm and values of d90 up to 908 mm. Extensive field measurements were performed to characterize geometric and hydraulic properties at 33 sites. Using these field data, at‐a‐station HG relationships were obtained for top width, average flow depth, and average flow velocity. Dimensional and dimensionless downstream HG relations were obtained for these parameters as well as the channel bed slope using the bankfull discharge estimated with at‐a‐station HG. The correlation coefficients indicate that the dimensionless equations adequately represent the observed data for all quantities with the exception of slope. In addition to a low correlation coefficient, the exponent on non‐dimensional discharge was small in the downstream HG relation for slope. This small exponent indicates that slope is not dependent on discharge. Based on this finding, the non‐dimensional HG relations were reformulated using both dimensionless discharge and bed slope as independent variables. These new relations show improved correlation coefficients and demonstrate the role of slope in determining channel width, flow depth, and average velocity in high gradient rivers. 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/315864 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | V. M. Carrillo,J. E. Petrie,F. E. Cisneros,et al. Application of hydraulic geometry to high gradient rivers in southern Ecuador[J]. Water Resources Research,2021. |
APA | V. M. Carrillo,J. E. Petrie,F. E. Cisneros,&L.M. Timbe.(2021).Application of hydraulic geometry to high gradient rivers in southern Ecuador.Water Resources Research. |
MLA | V. M. Carrillo,et al."Application of hydraulic geometry to high gradient rivers in southern Ecuador".Water Resources Research (2021). |
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