Validation of the Semi-Empirical Longshore Current Model.
NAVAL RESEARCH LAB STENNIS SPACE CENTER MS MARINE GEOSCIENCES DIV
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A previously developed semi-empirical longshore current model that does not rely upon bathymetry was tested to determine the validity of the model on both planar Santa Barbara, CA and barred beaches DUCK94 experiment. The only inputs are wave breaker height, wave breaker angle, and surf zone width. The model was further evaluated to determine conditions under which it failed. The results indicate that the model can be generally applied without a detailed knowledge of the bathymetry. Under most environmental circumstances, the percent error was 14-22. Based on the DUCK94 data set, the model did not perform as well when wind forcing or alongshore pressure gradients appeared to be forcing the longshore current. Nevertheless, 84 of the predictions had a normalized average error of 50 or less, indicating the model is reasonably robust.
- Physical and Dynamic Oceanography