Numerical simulation of rain-runoff process within the Zalău drainage, at the Sărmăşag gauging point


We use the rainfall-runoff model of Nielsen and Hansen in order to study the daily rates of flow at the hydrologic gauging point Sărmăşag on the Zalău river.

The Romanian national hydrographic data acquisition system enabled us to optimize the thirteen parameters of the model using an objective function.

Thus we have correctly predicted the flowing regime at this point for a period of five consecutive years.


L. Ilie
C.I. Gheorghiu
Tiberiu Popoviciu Institute of Numerical Analysis

Original title (in Romanian)

Simularea numerică a procesului ploaie-debit în bazinul hidrografic Zalău, staţia Sărmăşag


rainfall-runoff model; optimal parameters; hydrographic basin Zalau; Sărmăşag gauging point; rate of flow; forecasting;


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Paper coordinates

L. Ilie, C.I. Gheorghiu, Numerical simulation of rain-runoff process within the Zalău drainage, at the Sărmăşag gauging point, Hidrotehnica, 24 (1979) no. 7, 157-160 (in Romanian).


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[1] Ilie, I.,  Contribuții la simularea numerică a procesului ploaie-debit.In: Hidrotehnica, nr.5, 1978, p.108-110

[2] Nielsen, S. A. și Hansen, E,
 Numerical Simulation of the rainfall-ranoff process on a daily basis. In: Nordic Hydrology, nr. 4, 1973, p. 171-190.

[3] Nash, J. E.,
 The form of the instantaneous unit hydrograph. Intern. Assoc. Sci. Hydrology, Pub. 45, vol. 3, 1957, p. 114-121.

[4] Chow Ven Te,
 Handbook of applied hydrology. Section 14, New York, 1964.

[5] Johnston, P. R. si Piligram, D. A.
 A study of parameter optimization for a rainfall-randoff model.  The University of New South Wales, 1973.

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