https://scholars.lib.ntu.edu.tw/handle/123456789/638490
標題: | Rainfall frequency analysis using event-maximum rainfalls – An event-based mixture distribution modeling approach | 作者: | KE-SHENG CHENG Chen, Bo Yu Lin, Teng Wei Nakamura, Kimihito Ruangrassamee, Piyatida Chikamori, Hidetaka |
關鍵字: | Annual maxima | Event-maximum rainfalls | Frequency analysis | Mixture distribution | Negative binomial distribution | Poisson distribution | 公開日期: | 1-三月-2024 | 卷: | 43 | 來源出版物: | Weather and Climate Extremes | 摘要: | Rainfall frequency analysis, an essential work for water resources management, is often conducted by using the annual maximum rainfall series. For rainfall stations with short record lengths and outliers presence, the use of annual maximum series for rainfall frequency analysis may yield design rainfall estimates of higher uncertainties. Moreover, for regions with cyclostationary climate patterns, the annual maximum rainfalls may be caused by different prevalent storm types, which differ in terms of their occurrence frequency and storm rainfall characteristics. In this study, we propose a novel event-maximum-rainfall-based mixture distribution modeling approach for rainfall frequency analysis. By considering the event-maximum rainfalls of individual storm events, the sample size for parameter estimation increases, and the uncertainty of design rainfall estimates reduces. Mixture distribution modeling enables a thorough investigation of the contributing probabilities of different storm types to the annual maximum rainfall. Through rigorous stochastic simulation, we demonstrated the superiority of the proposed approach over the conventional annual maximum rainfall approach. The proposed approach was applied to four representative rainfall stations in Taiwan, and the results revealed that the proposed approach is more robust than the conventional annual maximum rainfall approach. The results provide insights into the contributions of individual storm types to the annual maximum rainfall. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/638490 | ISSN: | 22120947 | DOI: | 10.1016/j.wace.2023.100634 |
顯示於: | 生物環境系統工程學系 |
檔案 | 描述 | 大小 | 格式 | |
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@2024_WACE_RFA_Event-based Mixture Dist Modeling.pdf | 15.79 MB | Adobe PDF | 檢視/開啟 |
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