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Wave refraction analysis for a coastal site requires the construction of many refraction diagrams, one for each combination of wave period, height and deepwater direction of interest. The development of techniques for the numerical calculation of wave refraction diagrams in regions with uneven bottoms, as encountered in coastal areas, is a useful tool for Coastal Engineering studies. For this purpose, the mathematical and computation method to calculate the monochromatic wave refraction, proposed a few years ago by Dr. Alberto dos Santos (Franco, 1984), was improved, based on the method presented by Albernethy and Gilbert (1975). More information was added to the original program regarding wave deformations, such as the inclusion of the Theory of the Solitary Wave in the processes of velocity calculation, shoaling effect and breaking waves. The result of this process enables the visualization of the breaking zone for each wave and its characteristic parameters such as nearshore wave height and crest orientation at a given location. Moreover, the association of the wave crests with the orthogonals constitutes an excellent instrument to compare the plans of the theoretical crests with the real crests, for example, in aerial photographs. Quantification of these effects is also important to predict the longshore sediment transport. The development obtained has been applied in a case study describing the undulatory climate of the coastal area of Itanhaém (State of São Paulo), seeking to improve navigation in the Itanhaém River Bar. Key-words: wave; routing; coastal.

Aplicação de Programa de Cálculo de Propagação de Onda nas Praias de Itanhaém, SP