Bed morphology in steep open channels
State-of-the-Art and First Results of a Flume Study
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Date
2004
Publication Type
Conference Paper
ETH Bibliography
yes
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Abstract
The present paper outlines first results of a research project currently performed at the Laboratory of Hydraulics, Hydrology and Glaciology (VAW) of the Swiss Federal Institute of Technology (ETH) in Zurich. The purpose of the research project is to investigate the bed morphology and the stability in steep open channels hazard assessment. A better knowledge of bed morphology and stability is also required for the design of stable and nature-orientated man-made structures. First results concerning bed morphology show that within the typical step-pool geometry the predominant structures are steps that are orientated transverse to the direction of flow. The formation of ring-structures, clusters and oblique or curved steps depend on flume width, slope and discharge. The rising frequency of transversely orientated steps with increasing slope can be
attributed to the adaptation towards a more stable structure. The occurrence of macroscale
structures similar to alternate bars can be observed for larger channel widths, however, it is shown that they represent an independent bedform type.
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Publication status
published
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Editor
Book title
Schutz des Lebensraumes vor Hochwasser, Muren, Lawinen und Hangbewegungen: INTERPRAEVENT 2004. Tagungspublikation
Journal / series
Volume
1
Pages / Article No.
343 - 354
Publisher
Internationale Forschungsgesellschaft Interpraevent
Event
10. Internationales Symposion INTERPRAEVENT 2004
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Bed morphology; Torrents; Step-pool; Fume experiments
Organisational unit
03820 - Boes, Robert / Boes, Robert