Show simple item record Brewer, Paul A. Lewin, John 2008-12-17T11:14:27Z 2008-12-17T11:14:27Z 2001-10-01
dc.identifier.citation Brewer , P A & Lewin , J 2001 , ' Predicting channel patterns ' Geomorphology , vol 40 , no. 3-4 , pp. 329-339 . DOI: 10.1016/S0169-555X(01)00061-7 en
dc.identifier.issn 0169-555X
dc.identifier.other PURE: 96479
dc.identifier.other PURE UUID: e335b658-0d96-4338-88ba-f675c7ee48d1
dc.identifier.other dspace: 2160/1749
dc.identifier.other DSpace_20121128.csv: row: 1422
dc.identifier.other Scopus: 0034792140
dc.description Brewer, Paul, Lewin, J., (2001) 'Predicting channel patterns ', Geomorphology 40 pp.329-339 RAE2008 en
dc.description.abstract The proposed distinction between meandering and braided river channel patterns, on the basis of bankfull specific stream power and bed material size, is analysed and rejected. Only by using regime-based estimates of channel widths (rather than actual widths) has discrimination been achieved, and it is argued that this procedure is unacceptable. An alternative is to explore the patterning processes underlying the marked pattern scatter on bankfull stream power/bed material size plots. Of the five sets of patterning processes, large-scale bedform development and stability is seen as especially important for meandering and braiding. For gravel-bed rivers, bedforms developed at around or above bankfull stage appear important for pattern generation, with braiding relating to higher excess shear stress and Froude number. There seems to be an upper threshold to both meandering and braiding which is achieved at extreme discharges and steep gradients, as on steep alluvial fans, rather than for the rivers with available flow data here considered. For sand-bed rivers with greater excess shear stress, the equivalent upper plane bed threshold may occur below bankfull, with bed material mobility and bedform modification occurring over a wider range of sub-bankfull discharges. Sand-bed channel margin outlines appear to be less perturbed by bedform effects than gravel bed planforms, and they may have naturally straight or sinuous planforms. Bedform relief may nevertheless lead to some being designated as braided when viewed at low flows. It is concluded that the use of a single-stage stream power measure and bed material size alone is unlikely to achieve meandering/braiding discrimination. en
dc.format.extent 11 en
dc.language.iso eng
dc.relation.ispartof Geomorphology en
dc.rights en
dc.subject channel pattern en
dc.subject stream power en
dc.subject meandering en
dc.subject braiding en
dc.subject bedforms en
dc.subject grain size en
dc.title Predicting channel patterns en
dc.type /dk/atira/pure/researchoutput/researchoutputtypes/contributiontojournal/article en
dc.contributor.institution River Basin Dynamics and Hydrology en
dc.contributor.institution Department of Geography and Earth Sciences en
dc.description.status Peer reviewed en

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