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A non-Gaussian multicomponent model for river flow

par Vandewiele, Georges ;Dom, A.
Référence Water resources research, 25, 3, page (397-404)
Publication Publié, 1989-03

Article révisé par les pairs

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Résumé :

In order to model satisfactorily sharp rises and slow decreases appearing in any pure runoff time series with a small enough time base, exponentially decaying recession and base flow terms are first subtracted from total runoff. The remaining part is deseasonalized by a truncated Fourier series multiplicator and then modeled as a second-order Markov stationary series. The use of non-Gaussian distributions allows the modeling of zero contributions, which correspond to dry spells. An example has been optimized and simulated and the observed and simulated series have been compared, even on hydrologically interesting properties such as return periods, which are not modeled explicitly. The results were satifactory. -Authors