Precipitation analysis of the wider area of the Triglav national park for the period 1961-2009 | Analiza padavin na širšem območju Triglavskega narodnega parka za obdobje 1961-2009

anglais. The annual rainfall series were analyzed for the 18 meteorological stations in the wider area of the Triglav National Park for the period 1961-2009: the amount of annual rainfall, the number of days with 24-h rainfall totals exceeding 5, 10, 20, 50, 100, 150 mm and the number of 48-h rainfall totals exceeding 50, 100 and 150 mm. For snow cover, duration and the trend of days with snow cover were analyzed. The maximum annual precipitation over the entire period has been in Žaga by Bovec (2972 mm) and the minimum in Rateće (1532 mm). High interannual rainfall variability was noticed during period observed, more than twice as much rain has fallen in the wettest periods as in the driest periods. There were some significant differences between the decadal precipitation amounts. At most stations, the wettest period was 1961-1969 and the driest were 1980-1989 and 2000-2009. Heavy 24-h and 48-h rainfalls were measured at all stations, variability in the number of extreme rainfall events has increased with the amount of rainfall. The maximum number of days with day-rainfall above 5 mm was measured in Vogel (90), and above 10 mm (69) and 20 mm (44) in Kneške Ravne. Žaga had the highest number with rainfall above 50, 100 and 150 mm and Rateče the lowest one. The snow season has shortened in recent years, negative trends were observed at all stations in the number of days with snow cover. The significant trend rates ranged from -4.3 days/decade in Žaga to -14.9 days/decade in Stara Fužina.

slovène. Za 18 meteoroloških postaj na širšem območju Triglavskega narodnega parka smo za obdobje 1961-2009 analizirali letne višine padavin, število dni z dnevno višino padavin nad 5, 10, 20, 50, 100 in 150 mm ter število dvodnevnih nalivov z višino padavin nad 50, 100 in 150 mm. Za snežno odejo smo analizirali število dni po letnih časih in za snežno sezono ter trende v številu dni s snežno odejo. Največ padavin je imela v letnem povprečju Žaga pri Bovcu (2972 mm), najmanj Rateče (1532 mm). Medletna variabilnost višine padavin je na vseh postajah velika, v izrazito mokrih letih je višina padavin več kot dvakratna višina tiste v najbolj sušnih letih. Povprečne letne višine padavin, izračunane za dekade, se statistično značilno razlikujejo. Na večini postaj je bila najbolj mokra dekada 1961-1969, najbolj sušni dekadi pa 1980-1989 in 2000-2009. Na vseh postajah se pojavljajo močni enodnevni in dvodnevni nalivi, variabilnost števila izjemnih padavinskih dogodkov se povečuje z višino padavin. Največje število dni z višino padavin >5 mm ima Vogel (90), >10 mm in >20 mm Kneške Ravne (69 oz. 44). Dvodnevnih nalivov >50, >100 in >150 mm je največ na Žagi, najmanj pa v Ratečah. Na vseh postajah lahko vsako leto pričakujemo vsaj en dan, ko višina padavin presega 150 mm. Dolžina snežne sezone se v zadnjih letih zmanjšuje. Trend v številu dni s snežno odejo je na vseh postajah negativen. Velikost statistično značilnih sprememb je od -4,3 dni/10 let na Žagi do -14,9 dni/10 let v Stari Fužini.