WIT Press


A Comparison Of The Performance Of Coupled/uncoupled And Linear/non-linear Solutions Of The One-dimensional Sediment Routing Equations

Price

Free (open access)

Paper DOI

10.2495/HY940122

Volume

8

Pages

8

Published

1994

Size

807 kb

Author(s)

P.R. Wormleaton & A.R. Ghumman

Abstract

Movement of sediment in rivers can be described in terms of three one- dimensional equations. Two are the well-known St.Venant flow continuity and dynamic equations, the third is a mass continuity equation for sediment. Although there are many different methods of solution of these equations, they can usually be generically classified as either coupled or uncoupled and linear or non-linear. The sediment continuity equation is only explicitly coupled to the two St.Venant equations by one term, representing the rate of deposition. If this is ignored, then the equations can be solved in an uncoupled manner. The finite-difference solution of the above equations, leads to a non-linear set of simultaneous equations. These may

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