THE MAXIMUM AMOUNTS OF RAINFALL FALLEN IN SHORT PERIODS OF TIME IN THE HILLY AREA OF CLUJ COUNTY - GENESIS, DISTRIBUTION AND PROBABILITY OF OCCURRENCE
BLAGA IRINA, DRAGOTĂ CARMEN-SOFIA, IRIMUŞ I., A.
ABSTRACT. The maximum amounts of rainfall fallen in short periods of time in the hilly area of Cluj County - genesis, distribution and probability of occurrence. The maximum amounts of rainfall are usually characterized by high intensity, and their effects on the substrate are revealed, at slope level, by the deepening of the existing forms of torrential erosion and also by the formation of new ones, and by landslide processes. For the 1971-2000 period, for the weather stations in the hilly area of Cluj County: Cluj- Napoca, Dej, Huedin and Turda the highest values of rainfall amounts fallen in 24, 48 and 72 hours were analyzed and extracted, based on which the variation and the spatial and temporal distribution of the precipitation were analyzed. The annual probability of exceedance of maximum rainfall amounts fallen in short time intervals (24, 48 and 72 hours), based on thresholds and class values was determined, using climatological practices and the Hyfran program facilities.
Keywords: precipitation, short periods of time, geomorphological effects, probability of occurrence