Finite Difference Numerical Model for Long-Period Wave Behavior: With Emphasis on Storm Surge Modeling,
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB
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A two-dimensional numerical hydrodynamic model is presented including its applications to a variety of problems for which long-wave theory is valid. To achieve a solution of the governing equations, finite difference techniques are employed on a stretched rectilinear grid system. The most recent version of the model permits a selection of solution schemes. Choices include both implicit and explicit formulations written in terms of velocity or transport dependent variables. The model predicts vertically integrated flow patterns as well as the distribution of water surface elevations. Code features include the treatment of regions which are inundated during a part of the computational cycle, subgrid barrier effects, variable grid, and a variety of permissible boundary conditions and external forcing functions. Applicability of the model is demonstrated through a presentation of various ocean-estuarine system problems for which the model was applied. Emphasis is placed on storm surge modeling.