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Analiza sezonske in prostorske spremenljivosti značilnih pretokov rek v Sloveniji
ID Kostevc, Lea (Author), ID Kobold, Mira (Author), ID Šraj, Mojca (Author)

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Abstract
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.

Language:Slovenian
Keywords:srednji mali pretoki, srednji pretoki, veliki pretoki, sezonskost, prostorska spremenljivost
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Publication status:Published
Publication version:Version of Record
Year:2022
Number of pages:Str. 57-74
Numbering:Letn. 35, št. 62
PID:20.500.12556/RUL-163685 This link opens in a new window
UDC:556.06"32":556.536(497.4)
ISSN on article:0352-3551
DOI:10.15292/acta.hydro.2022.05 This link opens in a new window
COBISS.SI-ID:141419011 This link opens in a new window
Publication date in RUL:10.10.2024
Views:82
Downloads:21
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Record is a part of a journal

Title:Acta hydrotechnica
Publisher:Fakulteta za gradbeništvo in geodezijo
ISSN:0352-3551
COBISS.SI-ID:3664386 This link opens in a new window

Licences

License:CC BY-NC-SA 4.0, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International
Link:http://creativecommons.org/licenses/by-nc-sa/4.0/
Description:A Creative Commons license that bans commercial use and requires the user to release any modified works under this license.

Secondary language

Language:English
Title:Analysis of seasonal and spatial variability of river flow characteristics in Slovenia
Abstract:
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.

Keywords:mean low flows, mean flows, peak flows, stability, seasonality, spatial variability

Projects

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P2-0180
Name:Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij

Funder:Other - Other funder or multiple funders
Funding programme:Slovenska nacionalna komisija za UNESCO
Project number:UNESCO IHP C3330-20-456010

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