Search results for " Friction factors"

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Flow Resistance in Step-Pool Rills

2017

Rills evolve morphologically, and the adjustment of rill channel geometry to flow affects the relationships among velocity, discharge, and slope. The resistance to flow in step-pool rills is mainly due to form-induced mechanisms and, in comparison, grain resistance is of minor significance. Previous studies on rill flow resistance have been performed exclusively for grainresistance conditions and use a stream flow equation. In this study, a new flow resistance equation, deduced by applying dimensional analysis and self-similarity theory, was applied to rill flow in step-pool channels. First, the incomplete self-similarity hypothesis was used for establishing a power flow velocity profile wh…

Flow resistanceMorphology (linguistics)010504 meteorology & atmospheric sciences0208 environmental biotechnologySoil Science02 engineering and technologySTREAMSMechanics01 natural sciences020801 environmental engineeringFlow (mathematics)Dimensional analysis Flow resistance equations Friction factors Resistance equations Self-similarities Theoretical approach Theoretical expression Velocity profilesStream flowSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliGeology0105 earth and related environmental sciencesVadose Zone Journal

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