Stratification and Open Channel Flow

by Richard H. French, (A.M.ASCE), Asst. Prof. of Hydr. and Water Resources Engrg.; Dept. of Environmental Engrg. and Policy Management, Vanderbilt Univ., Nashville, Tenn.,

Serial Information: Journal of the Hydraulics Division, 1978, Vol. 104, Issue 1, Pg. 21-31

Document Type: Journal Paper

Discussion: Weisman Richard N. (See full record)
Closure: (See full record)


The effect of density stratification on the vertical velocity profile in turbulent open channel flow is examined. Using the Monin-Obukov length scale and Prandtl mixing length theory, equations reflective of the effect of stratification are derived, and the theory is extended to estimate values of the bottom boundary friction factor. Laboratory data are used to confirm the basic hypotheses. The results indicate that density stratification can significantly modify the shape of the vertical velocity profile and the value of the friction factor.

Subject Headings: Open channel flow | Water stratification | Stratified flow | Density stratification | Friction | Turbulent flow | Velocity profile | Density currents

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