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publications > water resources investigations > report 03-4287 > description of model structure

Description of Model Structure

>Model Structure
- Equations
- Numerical Solution
- Model Input
- Enhancements
Flow and Transport Model
Appendix I
Appendix II
The two-dimensional, vertically integrated, unsteady flow and transport model SWIFT2D (Leendertse, 1987) was applied to the study area. The model was first developed for applications in Jamaica Bay, N.Y. (Leendertse and Gritton, 1971). Since that time, the model has undergone numerous revisions and updates, including enhancements described in this report for the SICS area application.

The SWIFT2D model was originally designed to simulate flow and transport in vertically well-mixed estuaries, coastal embayments, lakes, rivers, and inland waterways. Westerink and Gray (1991) describe the model as "a very comprehensive modeling package which is based on a staggered alternating-direction implicit solution." SWIFT2D also includes many features such as time-stepping options, advective term discretization options, transport of passive tracers, coupled salinity transport, flooding and drying, the ability to include hydraulic structures, two alternative bottom friction terms including a form based on the subgrid scale energy level, a parametric expression for turbulence effects, various formulations for horizontal dispersion, and reactions and local inputs for transport. This section describes the governing equations, the numerical procedures to solve the model equations, model input requirements, and enhancements made to the model for this study.

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Last updated: 04 September, 2013 @ 02:04 PM(KP)