05 Sep 2023
 | 05 Sep 2023
Status: this preprint is open for discussion.

Brief communication: A first hydrological investigation of extreme August 2023 floods in Slovenia, Europe

Nejc Bezak, Panos Panagos, Leonidas Liakos, and Matjaž Mikoš

Abstract. Extreme floods occurred from 4th to 6th of August 2023 in Slovenia claiming 3 casualties and causing economic damage of a few billions EUR. The weather situation not typical for summer period in combination with high temperatures of the Mediterranean Sea and high antecedent soil moisture lead to the most extreme flood event in the last several decades. The return period of precipitation extremes and peak discharges exceeded 250–500 years return period, and runoff coefficient of typical torrential and mostly forested meso-scale catchments was around 0.5. Additionally, intense soil erosion, mass movements and sediment transport processes caused large damages on housing and infrastructure.

Nejc Bezak et al.

Status: open (until 27 Oct 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2023-1979', Anonymous Referee #1, 11 Sep 2023 reply
  • CC1: 'Comment on egusphere-2023-1979', Lorenzo Marchi, 12 Sep 2023 reply
  • CC2: 'Comment on egusphere-2023-1979', Ognjen Bonacci, 18 Sep 2023 reply

Nejc Bezak et al.


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Short summary
Extreme floods occurred in August 2023 in Slovenia. This brief communication investigates the main drivers, mechanisms and impacts of this event. The August 2023 flood disaster can be regarded as relatively extreme and it was probably the most extreme flood event in Slovenia in the last several decades. The economic damage was large and could reach well over 5 % of the annual Slovenia Gross Domestic Product, the event caused also three fatalities.