著者

寒川 典昭 荒木 正夫 渡辺 輝彦

出版者

Japan Society of Civil Engineers

雑誌

土木学会論文集 (ISSN:02897806)

巻号頁・発行日

vol.1986, no.375, pp.133-141, 1986-11-20 (Released:2010-08-24)

参考文献数

12

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This paper discusses the uncertainty of the estimated population parameters in the hydrologic frequency analysis. Firstly, the changes of the distribution shape and the probable variate of a fixed recurrence interval are investigated using the observed hydrologic data. Next, when the population parameters of the normal distribution are regarded as the random variables, the method of estimation of the decrease degree of the uncertainty, which is measured by the entropy of the distribution in unknown expectation-known variance and unknown expectation-unknown variance, is developed in some detail. Besides, applying this method of estimation to the observed hydrologic data, the validity of this method is investigated. Finally, the possibility of the application of this method to the non-normal population is suggested briefly.