Abstract
A quasi one-dimensional numerical-hydrodynamic model of storm surge in the Cape Fear River, North Carolina is formulated as an aid in determining storm tide frequencies. Separate momentum balances are maintained for the main channel and the adjacent shallows. Input at the ocean is specified from a hydrograph computed from Jelesnianski’s storm surge model, SPLASH, linearly combined with the astronomical tide. Verification was made for the astronomical tide and hurricanes Hazel, Diane, and Helene. Significant interaction between the hurricane surge and the astronomical tide is indicated. Storm data indicate that wind speeds over the upper portion of the estuary should be reduced to 0.7 of the open ocean values. Estimation of storm tide frequencies using this model is presented in a forthcoming paper by the writers.
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