20.500.12556/RUL-163685 Analiza sezonske in prostorske spremenljivosti značilnih pretokov rek v Sloveniji Analysis of seasonal and spatial variability of river flow characteristics in Slovenia Nihanja med malimi, srednjimi in velikimi pretoki v Sloveniji so velika, v zadnjih desetletjih pa se kaže še vpliv podnebne spremenljivosti. Zaradi pomanjkanja padavin in njihove neenakomerne časovne in prostorske porazdelitve je suša v Sloveniji vse večji problem, na drugi strani pa opažamo povečanje števila ekstremnih poplavnih dogodkov. V raziskavi je izdelana analiza regionalne raznolikosti in sezonskosti značilnih pretokov, in sicer srednjih malih (sQnp), srednjih (sQs) in velikih pretokov (vQvk) s 50 vodomernih postaj za obdobje 1960–2018 na letni in mesečni časovni skali. Izračunana so razmerja med značilnimi pretoki, rezultati pa so ovrednoteni tako časovno kot prostorsko. Razpon vrednosti razmerja vQvk/sQnp se giblje med približno 20 in 1000, medtem ko je razpon vrednosti razmerja sQs/sQnp med 2 in 20. Enostavno hierarhično razvrščanje vodomernih postaj za srednje male (sQnp) in srednje pretoke (sQs) je dalo podobne rezultate oz. so bile vodomerne postaje v obeh primerih razvrščene v pet enakih skupin. Pri enostavnem hierarhičnem razvrščanju vodomernih postaj glede na vrednosti visokovodnih konic (vQvk) pa so se izoblikovale štiri skupine. V vseh primerih lahko ugotovimo, da je posamezne skupine težko prostorsko opredeliti. The fluctuations between minimum, mean, and high flows in Slovenia are significant, and in recent decades the influence of climate variability is also evident. Due to the lack of precipitation and its uneven temporal and spatial distribution, drought is a growing problem in Slovenia, while on the other hand, the number of extreme flood events is increasing. In the study, the regional diversity and seasonality of characteristic flows, namely mean low (sQnp), mean (sQs), and peak flows (vQvk) from 50 gauging stations are analyzed for the period 1960–2018, applying both an annual and monthly time scale. The ratios between the characteristic flows are calculated, and the results are evaluated both temporally and spatially. The range of values of the ratio vQvk/sQnp varies from about 20 to 1000, while the range of values of the ratio sQs/sQnp is between 2 and 20. Hierarchical clustering of gauging stations for mean low (sQnp) and mean flows (sQs) gave similar results, i.e. gauging stations were clustered into five equal groups in both cases. In the case of hierarchical clustering of gauging stations according to the values of peak flows (vQvk), four groups were formed. However, we can conclude that individual groups are difficult to define spatially in all cases. srednji mali pretoki srednji pretoki veliki pretoki sezonskost prostorska spremenljivost mean low flows mean flows peak flows stability seasonality spatial variability true false true Slovenski jezik Angleški jezik Članek v reviji 2024-10-10 08:24:38 2024-10-10 08:24:42 2024-10-11 04:24:14 0000-00-00 00:00:00 2022 0 0 Str. 57-74 št. 62 Letn. 35 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 556.06"32":556.536(497.4) 0352-3551 10.15292/acta.hydro.2022.05 141419011 RAZ_Kostevc_Lea_2022.pdf RAZ_Kostevc_Lea_2022.pdf 1 8E6F2E07BBDE645F03BE4B71295C49FF d05e6b366d7e554f3fa3c05f1186d3a03215345e35ea18cda85312919910fb01 272fc482-86d0-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193561 https://actahydrotechnica.fgg.uni-lj.si/si/paper/a35lk 0 781591de-86d0-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=193562 Fakulteta za gradbeništvo in geodezijo Acta hydrotechnica 0 0 0