Bed Armoring Procedures in IALLUVIAL and Application to the Missouri River,
Abstract
The Conceptual model of bed 'armoring' employed in the IALLUVIAL numerical model for simulation of bed evolution in alluvial rivers has been critically assessed and refined. The approach involves use of the bed surface covered by immobile particles as a correction factor for reducing theoretical sediment transport capacity, reducing theoretical dune heights, and allocating energy losses between bed form resistance and surface roughness resistance. Computation of the armoring factor takes into account persistence in time, moving dune effects, and the stochastic nature of incipient particle motion. The report includes a review of current literature on armoring, describes the implementation of various armoring procedures in the IALLUVIAL computer program, and presents detailed results and analyses of all test performed, including several on the Missouri River between Omaha and Sioux City. Originator-supplied descriptors include: Sediment transport and Computational hydraulics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1983
- Accession Number
- ADA147413
Entities
People
- F. M. Holly
- J. F. Kennedy
- M. F. Karim
Organizations
- University of Iowa