| Abstract | Wind characteristics especially the event probability have been more studied in the relation to wind energy availability inàan area. Nevertheless, in the relation to coastal structure, it is still rare to be unveiled in a paper particulary in Indonesia. In thisàarticle, therefore, it is studied probability distribution commonly used to wind energy analysis i.e. Weibull and Rayleigh distribution.àThe distribution is applied to analyze wind data in Cilacap Coast. Wind data analyzed is from Board of Meteorology, Climatologyàand Geophysics, Cilacap branch, along two years (2009 â 2011). Mean, varians and standard deviation are founded to calculate shapeàfactor (k) and scale factor (c) which must be available to arrange distribution function of Weibull and Rayleigh. In the region, it gainsàa result that wind speed probabilities follow Weibull and Rayleigh function fairly. Shape parameter value has been gotten k = 3,26,àwhile scale parameter has been gotten respectively c = 3,64 for Weibull and Cr = 2,44 for Rayleigh. Value of k âÂÂ¥ 3 indicates the regionàhas regular and steady wind. Besides, mean speed of wind is 3,3 m/s. |
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