淡江大學機構典藏:Item 987654321/44578
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    题名: Bivariate frequency analysis of floods using copulas
    作者: 蕭政宗;Shiau, Jenq-tzong;Wang, Hsin-yi;Tsai, Chang-tai
    贡献者: 淡江大學水資源及環境工程學系
    日期: 2006-12
    上传时间: 2010-03-26 16:26:17 (UTC+8)
    出版者: Wiley-Blackwell
    摘要: Bivariate flood frequency analysis offers improved understanding of the complex flood process and useful information in preparing flood mitigation measures. However, difficulties arise from limited bivariate distribution functions available to jointly model the correlated flood peak and volume that have different univariate marginal distributions. Copulas are functions that link univariate distribution functions to form bivariate distribution functions, which can overcome such difficulties. The objective of this study was to analyze bivariate frequency of flood peak and volume using copulas. Separate univariate distributions of flood peak and volume are first fitted from observed data. Copulas are then employed to model the dependence between flood peak and volume and join the predetermined univariate marginal distributions to construct the bivariate distribution. The bivariate probabilities and associated return periods are calculated in terms of univariate marginal distributions and copulas. The advantage of using copulas is that they can separate the effect of dependence from the effects of the marginal distributions. In addition, explicit relationships between joint and univariate return periods are made possible when copulas are employed to construct bivariate distribution of floods. The annual floods of Tongtou flow gauge station in the Jhuoshuei River, Taiwan, are used to illustrate bivariate flood frequency analysis.
    關聯: Journal of the American Water Resources Association 42(6), pp.1549-1564
    DOI: 10.1111/j.1752-1688.2006.tb06020.x
    显示于类别:[水資源及環境工程學系暨研究所] 期刊論文

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