類別化手法に基づくわが国沿岸での風速および波高の極値の推定

概要

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This paper discusses the availability of a categorized data sampling technique in the extreme analysis. According to the class or meteorological disturbance and the class of some period in a year such as the season or month, four kinds of categorized maximum wind speed data sets are made from daily maximum wind speed data gathered over 16 to 34 years at 23 lighthouses around the coasts of Japan. The optimum distribution and the return wind speed with the standard deviation are estimated for each of categorized data sets by use of a modified version of Goda's extreme analysis model based on the least square method. Comparison among the results estimated from annual maximum data and those estimated from categorized data reveals that the data categorization method is not so advantageous over the usual method except for the cases where typhoon-generated winds are dominant. A similar conclusion is obtained from the investigation using the wave height data around the coasts of Japan.
1998-05-30