BIVARIATE ANALYSIS OF PRECIPITATION AND RUNOFF IN THE HIRFANLI DAM BASIN, TURKEY, USING COPULAS

Abstract

A bivariate analysis of precipitation and runoff in the Hirfanli dam basin, Turkey, using copulasis performed in this study. Two elliptical (Gaussian and Student-t) and three Archimedean family copulas(Clayton, Frank and Gumbel) are tested in modeling of the dependence structure between these hydrologicalvariables. The regionally averaged annual precipitation depths and runoff volumes measured at the entranceof the Hirfanli dam reservoir between 1954 and 2003 are utilized for the parameter estimation and modeling. Different graphical tools and numerical techniques are employed for the appropriate model selection,parameter estimation and goodness-of-Şt tests

Keywords

• Bivariate analysis
• Copulas
• Goodness-of-fit
• Precipitation
• Runoff
• Kizilirmak
• the Hirfanli reservoir

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