Summary:

The study was aimed assessment of seasonal occurrence of minimum flow (MF) for Kamienica Nawojowska river in cross-section Łabowa - right side tributary of Dunajec, by Colwell indices. Input data obtained from Institute of Meteorology and Water Management, the National Research Institute in Warsaw, were observation series of daily flows for the years 1983 - 2012. Based on obtained data it was computed the basic indices of minimum flow and the following Colwell's indices: predictability (P), constancy (C) and contingency (M). Moreover it was determined of impact of length record and number of classes discharge on values of P.
Based on calculations it was concluded that determined for MF of Kamienica river in cross-section Łabowa, value of P at 43% shows predictability below average level. The contingency determines value of P only in 18%, hence that flows are characterized by insignificant seasonality. Moreover it was conclude that length of record has significant impact on values of predictability. But for larger numbers of classes discharges, this dependency was not found.