COMPARISON OF WAVE HINDCAST METHODS FOR LOWER GULF OF THAILAND

Sutat Weesakul, Supot Charulakana

Abstract


The practical wave hindcast methods namely, SMB (Sverndrup- Munk-Bretchneider), PM (Pierson-Moskowitz) and SPM 1984 (Shore Protection Manual) were evaluated and aceesed for their accuracy using the one year recorded of the available oceanographic data at the lower gulf of Thailand in 1987. It was found that all models show the comparable accuracies of significant wave height (H ) and significant wave period (T ) but SPM (1984) rather gave the lowest root mean square error when H exceeds 1 m. The empirical formulae of land-wind velocity relationship was simply established in a exponential form. The value of constants in the expression between the 5 meteorological stations on land in the southern part of Thailand and the offshore platform were obtained as well. Using the land-wind velocity empirical formulae and a selected wave hindcast method to predict H and T , the better result was obtained by the low RMSE value.

Keywords


Gulf of Thailand; wave hindcasting; hindcast model

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