灌溉排水学报2017，Vol.36Issue(9)：102-107,6.DOI:10.13522/j.cnki.ggps.2017.09.018
基于三维Copula函数的沙颍河流域水文干旱频率分析
Analyzing the Drought Frequency in Shaying River Basin Using the Three-dimensional Copula Function
摘要
Abstract
This paper analyzed the drought characteristics based on data measured in 1951-2008 from two hydrological stations in the Shaying River Basin.We took standardized runoff index as an indicator of the hydrological drought,calculating the hydrological drought characteristics including drought duration,drought severity,and peak of the drought severity,using the theory of run test.The joint distributions of the drought characteristic variables were analyzed using four types of symmetric and asymmetric Archimedean Copulas functions;the goodness of the fitting of the functions was evaluated using the Kolmogorov-Smimov test method.The results showed that the Frank Copula function gave the best fitting for two-dimensional joint distributions of two characteristic drought variables,while the M3 copula function worked better for fitting three-dimensional joint distributions of three characteristic drought variables.It was also found that the return period calculated from single variable was greater than that calculated from the two-and three-dimensional distribution for the joint return periods,but less than that from the two-and three-dimensional distributions for the co-occurrence return periods.Thus,the Copula functions are able to describe the multivariate joint distributions of hydrological drought variables in the Shaying River Basin.关键词
沙颍河流域/标准化径流指数/游程理论/Copula函数/重现期Key words
Shaying River Basin/Standardized Runoff Index/theory of run/Copulas function/return period分类
农业科技引用本文复制引用
马建琴,和鹏飞,彭高辉,崔弼峰,刘蕾..基于三维Copula函数的沙颍河流域水文干旱频率分析[J].灌溉排水学报,2017,36(9):102-107,6.基金项目
河南省高校科技创新人才支持计划项目(15HASTIT046) （15HASTIT046）
河南省科技攻关项目(152102110095) （152102110095）
河南省高等学校重点科研项目(15A570008) （15A570008）
国家自然科学基金项目(41601019) （41601019）
