Statistical Properties of Missouri River Bed Forms

by V.S. Shastri Annambhotla, Supervisor, Water Resources and Soil Mechanics Section; Sargent & Lundy Engrs., Chicago, IL,
William W. Sayre, Res. Engr.; Inst. of Hydr. Res., and Prof., Dept. of Mech. and Hydr., Univ. of Iowa, Iowa City, IA,
Robert H. Livesey, Supervisory Hydr. Engr.; Corps of Engrs., Omaha, NE,

Serial Information: Journal of the Waterways, Harbors and Coastal Engineering Division, 1972, Vol. 98, Issue 4, Pg. 489-510

Document Type: Journal Paper


A logarithmic resistance relationship for flow near rough boundaries was formulated which relates bed form dimensions to flow resistance in large alluvial channels with dune beds. Bed profile data, obtained from a reach of the Missouri River at Omaha, NE, were analyzed statistically to obtain characteristic bed form dimensions. Different statistical techniques were explored and the zero-crossing distances and amplitudes analysis is shown to be the one best suited for this investigation. Estimates of bed form dimensions obtained form the preceding analyses together with frequency distributions of bed elevations, wave lengths, amplitudes and heights of the dune bed forms are presented. A plot of the bed form friction factor versus a modified relative roughness parameter incorporating statistical estimates of bed form dimensions is presented and is shown to be roughly consistent with the Karman-Prandtl logarithmic law.

Subject Headings: Alluvial channels | Flow resistance | Statistics | Bed forms | Load and resistance factor design | Channel flow | Dunes | Frequency distribution | Missouri River | Nebraska | United States

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