Analytical Model of Navigation Channel Infilling by Cross-Channel Transport
Abstract
An analytic model is presented for estimating the time-evolution of bank encroachment, sediment deposition, and bypassing of a channel of specified initial cross section exposed to an active zone of longshore or other known cross-channel sediment transport. It is applicable to channels in estuaries, bays, and lakes by input of the rate of sediment transport "sand to gravel range" approaching normal to the channel. The model can be applied to estimate necessary depth and width of a channel to be newly dredged or the performance of a channel to be deepened and widened. The model is based on the continuity equation governing conservation of sediment volume, together with typically available or estimated input transport rates in engineering applications. An analytical solution of the linearized coupled differential equations has pedagogic value and gives insight into the processes of channel infilling and bypassing. The analytic model can also serve as an engineering screening tool. Numerical solution of the full nonlinear, coupled equations allows extension to more complex situations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2002
- Accession Number
- ADA483133
Entities
People
- Magnus Larson
- Nicholas C. Kraus
Organizations
- Engineer Research and Development Center