Th e purpose of this study was to obtain and prove the methods of catchment regionalization in case of annual maximum fl oods. Identifi cation of Polish rivers was hold on the basis of regional frequency analyses including recognition of homogenous regions in their physical properties and river fl ow parameters. Results indicate the division on two regional groups: mountain and lowland catchments. Statistical tests prove the obtained regionalization and allow calculating the regional

more »

... curves for these two catchment groups. Obtained results may be helpful in the analysis of fl oods in ungauged catchments and these where hydrological observations were held in a short period especially when dependency of the maximum probable fl ows in analysed catchments from their physico-geographical features was proved. Słowa kluczowe: przepływy maksymalne roczne prawdopodobne, analiza częstotliwości regionalnej, wezbranie, czas powtarzalności, typologia zlewni Key words: annual probable maximum fl ow, regional frequency analysis, fl ood, return period, typology of a basin WSTĘP Metoda analizy regionalnej częstości wezbrań znajduje zastosowanie wów-czas, gdy brakuje danych hydrologicznych niezbędnych do oszacowania parame-trów wezbrania w zadanym czasie lub informacja, którą dysponujemy jest nie-*