Investigation of spatial and temporal variability of hydrological drought in Slovenia using the Standardised Streamflow Index (SSI)

Zalokar, Lenka (avtor), Kobold, Mira (avtor), Šraj, Mojca (avtor)

Drought is a complex phenomenon with high spatial and temporal variability. Water scarcity has become a growing problem in Slovenia in recent decades. Therefore, the spatial and temporal variability of hydrological drought was investigated in this study by analysing the Standardized Streamflow Index (SSI). Monthly discharge data series from 46 gauging stations for the period 1961–2016 were used to calculate SSI values at five different time scales (1, 3, 6, 12, and 24 months). The results indicate that the frequency and intensity of droughts in Slovenia has increased in recent decades at most of the analysed gauging stations and at all time scales considered. Spring and summer periods were identified as critical in terms of water deficit. SSI values vary independently from the location of the gauging station, confirming that drought is a regional phenomenon, even in a small country such as Slovenia. However, SSI values vary considerably depending on the time scale chosen. This was also confirmed by the results of the hierarchical clustering of the number of extreme droughts, as various time scales resulted in a different distribution of gauging stations by individual groups.

• Jezik: Angleški jezik
• Ključne besede: hydrological drought, Standardised Streamflow Index, SSI, hierarchical clustering, seasonality
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 15 str.
• Številčenje: Vol. 13, iss. 22, art. 3197
• PID: 20.500.12556/RUL-133437
• UDK: 556
• ISSN pri članku: 2073-4441
• DOI: 10.3390/w13223197
• COBISS.SI-ID: 85603331
• Datum objave v RUL: 26.11.2021

Gradivo je del revije

• Naslov: Water
• Skrajšan naslov: Water
• Založnik: Molecular Diversity Preservation International - MDPI
• ISSN: 2073-4441
• COBISS.SI-ID: 36731653

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 11.11.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: hidrološka suša, standardizirani indeks pretoka, SSI, hierarhično razvrščanje, sezonskost

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P2-0180
• Naslov: Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij

• Financer: Drugi - Drug financer ali več financerjev
• Program financ.: UNESCO, IHP, Slovenian National Committee
• Številka projekta: C3330-20-456010