A Numerical Model for Flow and Sediment Transport in Alluvial-River Bends.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1983
- Accession Number
- ADA138035
Entities
People
- J. F. Kennedy
- J. L. Vadnal
- T. Nakato
Organizations
- University of Iowa