Two-Dimensional Numerical Modeling for Long-Term Sedimentation

by W. H. McAnally, USAE Waterways Experiment Station, United States,
J. V. Letter, USAE Waterways Experiment Station, United States,
B. P. Donnell, USAE Waterways Experiment Station, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: Numerical modeling of long-term sedimentation processes in multi-dimensional models is computationally intensive and thus often uneconomical. A statistical superposition technique has been used to overcome this problem under ordinary circumstances where depth changes due to deposition or erosion over the period modeled can be assumed to be small with respect to the water depth. In the case of Atchafalaya Bay, the small depth change assumption was not valid and an iterative superposition method has been employed to model 50 years of sedimentation.

Subject Headings: Numerical models | Two-dimensional models | Hydrologic models | Mathematical models | Sediment transport | Computer models | Statistics

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