Spatial and temporal variability in rainfall erosivity under Alpine climate - a Slovenian case study using optical disdrometer data

Bezak, Nejc (avtor), Petan, Sašo (avtor), Mikoš, Matjaž (avtor)

Rainfall erosivity is one of the most important parameters that influence soil erosion rates. It is characterized by a large spatial and temporal variability. For example, in Slovenia, which covers around 20,000 km2, the annual rainfall erosivity ranges from less than 1,000 MJ mm ha1 h1 to more than 10,000 MJ mm ha1 h1. Drop size distribution (DSD) data are needed to investigate rainfall erosivity characteristics. More than 2 years of DSD measurements using optical disdrometers located at six stations in Slovenia were used to investigate the spatial and temporal variability in rainfall erosivity in Slovenia. Experimental results have indicated that elevation is a poor predictor of rainfall erosivity and that erosivity is more strongly correlated to the mean annual precipitation. Approximately 90% of the total kinetic energy (KE) was accounted for in about 35% of 1 min disdrometer data. The highest 1 min intensities (I) and consequently also KE values were measured in summer followed by autumn and spring. The local KE-I equation yielded an acceptable fit to the measured data in case of all six stations. The relatively large percentage of 1 min rainfall intensities above 5 mm/h can at least partially explain some very high annual rainfall erosivity values (i.e., near or above 10,000 MJ mm ha1 h 1). Convective and large-scale precipitation events also result in various rainfall erosivity characteristics. The station microlocation and wind impacts in case of some stations yielded relatively large differences between the data measured using the optical disdrometer and the pluviograph. Preliminary conclusions have been gathered, but further measurements are needed to get even better insight into spatial and temporal variability in rainfall erosivity under Alpine climate in Slovenia.

• Jezik: Angleški jezik
• Ključne besede: rainfall erosivity, kinetic energy, disdrometer, altitude, climate, hydrology, Slovenia
• Vrsta gradiva: Znanstveno delo
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FGG - Fakulteta za gradbeništvo in geodezijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Poslano v recenzijo: 02.07.2021
• Datum sprejetja članka: 10.09.2021
• Datum objave: 13.10.2021
• Leto izida: 2021
• Št. strani: [16] str.
• Številčenje: Letn. XX, št. 13. okt.
• PID: 20.500.12556/RUL-132161
• UDK: 556(497.4)
• ISSN pri članku: 2296-665X
• DOI: 10.3389/fenvs.2021.735492
• COBISS.SI-ID: 80414467
• Datum objave v RUL: 14.10.2021

Gradivo je del revije

• Naslov: Frontiers in environmental science
• Skrajšan naslov: Front. environ. sci.
• Založnik: Frontiers Media S.A.
• ISSN: 2296-665X
• COBISS.SI-ID: 523094297

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: 13.10.2021

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: erozivnost padavin, kinetična energija, disdrometer, nadmorska višina, klima, hidrologija, Slovenija

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