Accession Number : ADA138035

Title :   A Numerical Model for Flow and Sediment Transport in Alluvial-River Bends.

Descriptive Note : Final rept.,


Personal Author(s) : Nakato,T ; Kennedy,J F ; Vadnal,J L

PDF Url : ADA138035

Report Date : Dec 1983

Pagination or Media Count : 147

Abstract : Closed-form mathematical models are formulated for the rate of development and strength of secondary current, and for bed topography in meandering, erodible-bed streams of arbitary plan form. The formulations utilize conservation of flux-of-moment-of momentum as the additional relation required to complete the formulation for the radial bed-shear stress. The secondary-flow-velocity calculation was uncoupled from the calculation of the radial mass-shift velocity and streamwise velocity distributions, which were obtained from the depth-integrated equations expressing conservation of mass and streamwise momentum. Numerical simulations were made for one laboratory flow and two Sacramento River flows with constant centerline curvature. Good agreement was obtained between measured and computed distributions of flow and depth-averaged streamwise velocity. (Author)

Descriptors :   *Water flow, *Sediment transport, Rivers, Curved profiles, Channels(Waterways), Computerized simulation, Computer programs

Subject Categories : Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE