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National IHP-UNESCO Seminar: 2005-2015 United Nations Decade For Action "WATER FOR LIFE"
 

Summary: National IHP-UNESCO Seminar: 2005-2015 United Nations Decade For Action
"WATER FOR LIFE"
24
P.Claps, P.Allamano, F.Laio
Some Considerations on Univariate and Multivariate
Streamflow Simulation Methods
Pierluigi Claps, Paola Allamano, Francesco Laio
Dipartimento di Idraulica, Trasporti e Infrastrutture Civili, Politecnico di Torino,
Corso Duca degli Abruzzi 24, 10129, Torino, Italia
Keywords: Effective Rainfall; Inverse estimation; Daily runoff
Abstract: Streamflow simulation over time intervals much longer than observation periods requires the
evaluation of the quality of the reproduction of observed statistics of time series. Since much of the non linearity of
the rainfall-runoff transformation is in the conversion of rainfall to effective rainfall (ER), two approaches with
fundamental differences in the ER estimation are put under comparison, to highlight pros and cons of univariate
and bivariate methods. We propose a comparison of IHACRES and Shot Noise models, which involve direct and
inverse estimates of ER at the daily time scale. The comparison is carried out in terms of assessment of
inconsistencies in evaluating ER by direct and inverse estimates, both in temperate and in alpine basins. Additional
comparisons regard the reproduction of direct runoff with the two approaches. The results demonstrate that
relatively few improvements are obtained by considering a bivariate streamflow simulation method, i.e. by using
the rainfall time series for streamflow modelling.

  

Source: Allamano, Paola - Dipartimento di Idraulica,Trasporti e Infrastrutture Civili, Politecnico di Torino
Claps, Pierluigi - Dipartimento di Idraulica,Trasporti e Infrastrutture Civili, Politecnico di Torino

 

Collections: Engineering; Geosciences