Guy Morin

UTILISATION D'UN MODÈLE DE FONTE DE NEIGE À MAILLES PHYSIOGRAPHIQUES

ABSTRACT The authors first describe a parametric model, based on spatial subdivisions of a watershed. This model makes it possible for daily flows to be derived at any number of arbitrarily chosen points on the basin from the knowledge of the distribution of rain or snowmelt water over the basin. The presentation goes on with a discussion on some applications in hydrological analyses and research with particular reference to snowmelt; this subject is particularly concerned with this technique of division in time and space.

Approximate confidence intervals for verification criteria of the WMO intercomparison of snowmelt runoff models

Abstract The comparison of the performances of hydrological models is usually based on the values of criteria which are functions of the differences between estimated and observed flows. In comparing models we have to consider whether the differences between performance criterion values may be due to sampling variation. To deal with this problem, the comparison of approximate confidence intervals of criterion values using the jackknife statistic is proposed. The method is applied to the results of the recent WMO project for the intercomparison of conceptual models of snowmelt runoff.