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Multivariate Flood Frequency Analysis Using Bivariate Copula Functions
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DOI：10.1007/s11269-021-03055-3.png)
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Abstract
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Multivariate analysis of flood frequency was used extensively in water resources research. Often the only flood peak or volume is analyzed with statistical distributions, but for a perfect and exact result, the four main characteristics of a flood event, as well as peak, volume, duration, and time-to-peak, are needed. For this reason, multivariate statistical approaches like copula functions developed. This research aims to define and use the bivariate copula (2-copula) probability distribution functions (PDF) for flood characteristics multivariate analysis. When the joint distribution of characteristics such as volume and peak is known, it is possible to define the probability of simultaneous occurrence of design volume and peak flow values.
Keywords:
Flood characteristic
Bivariate frequency analysis
Copula
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