Since most hydrological quantities are regarded as random variables, it is important thattheir distributions of probability be identifi ed. This paper therefore presents the results of a fi tting ofmost frequently-applied probability distributions to a series of minimum yearly fl ows. Specifi cally, theseries of minimal annual discharges derived from 119 stream gauges located throughout Poland and relatingto the period 1971-1990. The main task was to adjust one of the probability distribution functionsapplied most frequently (Fig. 1). Maps generated provide for the identifi cation of several regularities.
Adam Bartnik, Department of Hydrology and Water Management University of Łódź Narutowicza 88, 90-139 Łódź, Poland