IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : An Analysis of the Morphology of River Meanders in Equilibrium with a Variational Approach
An Analysis of the Morphology of River Meanders in Equilibrium with a Variational Approach
Author : Mingwu Zhang and Heqing Huang
Rivers are self-adjusting systems and reach stable equilibrium when the condition of maximum flow efficiency (MFE), defined as the maximum sediment transporting capacity per unit available stream power, is satisfied. This is a true principle because MFE is inherent in basic flow relationships governing flow in alluvial channels. However, previous justifications on the existence of MFE are mainly made for flow in a straight alluvial channel and this study is an attempt to examine if MFE also controls flow in a meandering alluvial channel. By introducing a curved channel form factor (ratio of the radius of curvature to channel width, or r \B) into basic flow relationships for meandering c channel flow, a complex relationship between bed load sediment transport capacity and r \B is identified. c By performing a variational analysis of the relationship, primary results show that bedload transport capacity reaches a maximum when r \B takes a definite value. A further detailed analysis is under way to c uncover the general flow condition and the relevant stable channel morphology of meandering river channels.
File Size : 202,341 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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