Scilab Function
Last update : 16/9/2006

GR4J_CAL_LM - Function to calibrate GR4J model with a split sample test using lsqrsolve

Calling Sequence

[X,CALC,CR,[S,R]]=GR4J_CAL_LM(Q,P,E,TS,[ICAL,TSini,FOBJ,Xini,RSini])

Parameters

Description

The function performs the following actions:

(1) The dataset is split into 2 equal parts, P1 and P2. P3 represents the whole dataset.

(2) On each sub-period, GR4J is calibrated with the lsqrsolve function (see lsqrsolve function and c_GR4J).

(3) The calibration quality on P1 and P2 is assessed by calculating quality criteria (see CRIT function).

(4) The model quality in validation mode is assessed by calculating quality criteria on a simulation made on P1 with parameters from P2 and vice-versa.

See Also

c_GR4J ,   lsqrsolve ,   CRIT ,  

Authors

Julien Lerat CEMAGREF Antony, HBAN Unit, julien.lerat@cemagref.fr

Bibliography

Klemes, V. (1986). "Operational testing of hydrological simulation models." Hydrological Sciences Journal/Journal des Sciences Hydrologiques 31(1): 13-24. Perrin, C., C. Michel, et al. (2003). "Improvement of a parsimonious model for streamflow simulation." Journal of Hydrology 279(1-4): 275-289. Edijatno and C. Michel (1989). "Un modèle pluie-débit journalier à trois paramètres." La Houille Blanche 2: 113–121.