Options
Discharge assessment in mobile-bed compound meandering channels
Date Issued
2003-12-01
Date Available
2013-01-21T16:54:27Z
Abstract
Many discharge prediction methods have been developed for compound meandering channels. Most of these methods have been found to produce reasonable results for fixed-bed channels, but the effects of the presence of a mobile main channel bed on discharge assessment have yet to be assessed. Sediment movement increases the complexity of experiments by facilitating the creation of bedforms, which alter flow resistance. The shape characteristics of these bedforms and their associated roughness are known to depend on channel stage and geometry, and to vary with flow conditions. This paper seeks to assess the performance of six discharge assessment methods using the Phase C mobile-bed meandering UK Flood Channel Facility (FCF) overbank flow data. The results show that the accuracy of the different methods depends heavily on the boundary roughness, and the James and Wark (1992) method performed most consistently for the range of floodplain configurations tested. A modification to this method is also presented that is shown to improve the accuracy of the predicted discharges.
Type of Material
Journal Article
Publisher
Institution of Civil Engineers
Journal
Proceedings of the ICE - Water and Maritime Engineering
Volume
156
Issue
4
Start Page
313
End Page
323
Copyright (Published Version)
2003, ICE Publishing Ltd
Language
English
Status of Item
Peer reviewed
ISSN
1472-4561
1753-7800
This item is made available under a Creative Commons License
File(s)
Owning collection
Scopus© citations
2
Acquisition Date
Mar 28, 2024
Mar 28, 2024
Views
1515
Acquisition Date
Mar 28, 2024
Mar 28, 2024
Downloads
569
Last Month
6
6
Acquisition Date
Mar 28, 2024
Mar 28, 2024