An improved method of parameter range selection and its application to WEP2L model

There ar e many par amet ers in a distributed hydrolog ical mo del and the parameters ar e no t completely independent from each other. During model calibr atio n, there is mut ual restrain o f t he selectio n o f some par ameters. T he WEP2L, a distribu2 ted hydro log ical model, w as taken as an example to v alidate the efficacy of the GLUE method fo r parameter calibratio n. T he So bo l method and the parameter range selectio n method of co ncept ual hydro log ical models w ere combined to pro vide a scheme of parameter calibratio n fo r WEP2L. The scheme w as applied to the Baihe basin. Results showed t hat the par ameters of WEP2L model could be auto2calibrated w ith the help of GLUE method, Sobol analy sis, and par ameter range selection. The simulatio n pr ecision w as 01 633. The Sobol ana lysis can o ptimize the principle of par ameter rang e selectio n and im pr ove the simulation pre2 cisio n. The results can pr ov ide useful refer ence for the par ameter calibar ation of distributed hydro log ical models.

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