Sezony hydrologiczne w czterech wybranych rzekach Polski o zróżnicowanych warunkach kształtowania się reżimu odpływu

Abstract

The article describes an attempt at the delimitation of hydrological seasons in four rivers in Poland. The rivers are located in mountain (Raba), highland (Kamienna), lowland (Bzura) and lakeland (Pisa) areas. The number of hydrological seasons identified in the examined group of rivers equals 11. There are 4 seasons in each of the rivers. Each season may occur more than once a year in the studied river. Therefore, the number of occurrences of seasons varies from 9 to 19. The hydrographs of mountain rivers are more fragmented, while the lowland and lakeland rivers have longer seasons.