A MATHEMATICAL-MODEL FOR PRECIPITATION IN THE BASQUE COUNTRY, SPAIN

Most hydrological phenomena in a specific region are, in general, non- homogeneous processes; such is the case of rainfall in the Basque Coun try of northern Spain. An analysis of precipitation events occurring t here permits identification of different regions according to the mean storm occurrence rate and the mean number of storms per unit volume o f precipitation. In this paper, a model of regional precipitation (Tod orovic, 1967; Llamas, 1986) is applied to the Basque Country using rec orded daily precipitation greater than 1 mm. The precipitation paramet ers mentioned above reveal two distinct pluviometric regions.