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dc.contributor.authorPowell, D. Marken_GB
dc.contributor.authorBrazier, Richard E.en_GB
dc.contributor.authorWainwright, Johnen_GB
dc.contributor.authorParsons, Anthonyen_GB
dc.contributor.authorNichols, Maryen_GB
dc.date.accessioned2010-04-30T11:55:16Zen_GB
dc.date.accessioned2011-01-25T10:38:54Zen_GB
dc.date.accessioned2013-03-20T14:29:50Z
dc.date.issued2006-08en_GB
dc.description.abstractSpatial patterns of scour and fill in two dryland ephemeral stream channels with sandy bed material have been measured with dense arrays of scour chains. Although the depth and areal extent of bed activity increased with discharge, active bed reworking at particular locations within the reaches resulted in downstream patterns of alternate shallower and deeper areas of scour. The variation was such that mean scour depths for individual cross sections varied about the mean for the reach by a factor of 2–4 while the locus of maximum scour traced a sinuous path about the channel centerline. The wavelength of the pattern of scour was about seven times the channel width. During each event, compensating fill returned the streambeds to preflow elevations, indicating that the streams were in approximate steady state over the period of study. Although the patterns of periodically enhanced scour along alternate sides of the channels are consistent with models of periodically reversing helical flow, further work is required to identify the causal relationships between patterns of flow and sediment transport in dryland sand bed channels.en_GB
dc.identifier.citationWater Resources Research, 2006, 42, W08412en_GB
dc.identifier.doi10.1029/2005WR004516en_GB
dc.identifier.urihttp://hdl.handle.net/10036/97753en_GB
dc.language.isoenen_GB
dc.publisherAmerican Geophysical Unionen_GB
dc.relation.urlhttp://www.agu.org/pubs/crossref/2006/2005WR004516.shtmlen_GB
dc.subjectdryland riversen_GB
dc.subjectsand bed streamsen_GB
dc.subjectscour and fillen_GB
dc.subjectsediment transporten_GB
dc.titleSpatial patterns of scour and fill in dryland sand bed streamsen_GB
dc.typeArticleen_GB
dc.date.available2010-04-30T11:55:16Zen_GB
dc.date.available2011-01-25T10:38:54Zen_GB
dc.date.available2013-03-20T14:29:50Z
dc.identifier.issn0043-1397en_GB
dc.descriptionReproduced with permission of the publisher. © 2006 American Geophysical Unionen_GB
dc.identifier.journalWater Resources Researchen_GB


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