基于Copula函数的洞庭湖流域水沙丰枯遭遇频率分析

周念清, 赵露, 沈新平

Copula-based Probability Evaluation of Rich-Poor Runoff and Sediment Encounter in Dongting Lake Basin

Nian-qing ZHOU, Lu ZHAO, Xin-ping SHEN

表3 各Copula函数拟合优度检验

Table 3 Goodness-of-fit test of each copula joint distribution

检验方法 Clayton Copulas Gumbel-Hougaard Copulas Frank Copulas 城陵矶 OLS 0.024 0.024 0.021 AIC -391.828 -391.754 -407.144 三口 OLS 0.028 0.030 0.027 AIC -375.270 -370.788 -381.026 四水 OLS 0.040 0.030 0.034 AIC -339.196 -368.649 -355.372