Estimation of Sea Wave Height in Toaya Coastal Waters, Central Sulawesi

Abstract

Introduction: Toaya is one of the villages located in Sindue District, Donggala Regency, which along the village is located in the coastal area of the high seas. Donggala Regency is the oldest port city in Central Sulawesi Province whose territory has a long coastal area of 400 km. The waves that occur in the ocean are mainly caused by the influence of the wind.  Method:  This study aims to obtain wave heights that occur at Toaya Beach and can predict waves that occur with a return period of the next few years period (2, 5, 10, 25, 50, 100) years using the Gumbel Method and Fisher Typpet-Type 1 Method. Results and Disscussion:  Based on the results of the analysis, it was found that the significant wave height (Hs) = 1.65 m and the significant wave period (Ts) = 7.05 seconds in 2013 in the northwest direction. For the analysis of the frequency distribution using the Gumbel method at a return period of 2 years = 1.45 m, at a return period of 5 years = 1.59 m, at a return period of 10 years = 1.69 m, at a return period of 25 years = 1.80 m , at the return period of 50 years = 1.89 m and at the return period of 100 years = 1.98 m while the frequency distribution analysis using the Fisher Tippet Type-1 method at the return period of 2 years = 1.45 m, at the return period of 5 years = 1.56 m, at a return period of 10 years = 1.63 m, at a return period of 25 years = 1.72 m, at a return period of 50 years = 1.79 m and at a return period of 100 years = 1.86 m