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dc.contributor.authorRouhipour, H
dc.contributor.authorRose, CW
dc.contributor.authorYu, B
dc.contributor.authorGhadiri, H
dc.date.accessioned2019-05-17T00:31:50Z
dc.date.available2019-05-17T00:31:50Z
dc.date.issued1999
dc.identifier.issn0197-9337
dc.identifier.doi10.1002/(SICI)1096-9837(199903)24:3<233::AID-ESP949>3.0.CO;2-T
dc.identifier.urihttp://hdl.handle.net/10072/122402
dc.description.abstractEven with the flow of water over a soil surface in which roughness elements are well inundated, and in less erosive situations where erosional bed forms are not pronounced, the magnitude of resistance coefficients in equations such as those of Darcy–Weisbach, Chezy or Manning vary with flow velocity (at least). Using both original laboratory and field data, and data from the literature, the paper examines this question of the apparent variation of resistance coefficients in relation to flow velocity, even in the absence of interaction between hydraulics and resulting erosional bed forms. Resistance equations are first assessed as to their ability to describe overland flow velocity when tested against these data sources. The result is that Manning's equation received stronger support than the Darcy–Weisbach or Chezy equations, though all equations were useful. The second question addressed is how best to estimate velocity of overland flow from measurements of slope and unit discharge, recognizing that the apparent flow velocity variation in resistance coefficients is probably a result of shortcomings in all of the listed resistance equations. A new methodology is illustrated which gives good agreement between estimated and measured flow velocity for both well‐inundated sheet and rill flow. Comments are given on the predictive use of this methodology.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherWiley Europe
dc.publisher.placeUK
dc.relation.ispartofpagefrom233
dc.relation.ispartofpageto245
dc.relation.ispartofissue3
dc.relation.ispartofjournalEarth Surface Processes and Landforms
dc.relation.ispartofvolume24
dc.subject.fieldofresearchGeology
dc.subject.fieldofresearchPhysical geography and environmental geoscience
dc.subject.fieldofresearchHydrology
dc.subject.fieldofresearchcode3705
dc.subject.fieldofresearchcode3709
dc.subject.fieldofresearchcode3707
dc.titleRoughness Coefficients and Velocity Estimation in Well-inundated Sheet and Rilled Overland Flow without Strongly Eroding Bed Forms
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith Institute for Drug Discovery
gro.hasfulltextNo Full Text
gro.griffith.authorRose, Calvin W.
gro.griffith.authorYu, Jimmy J.
gro.griffith.authorYu, Bofu


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