Professional paper

A contribution to the analysis of urban flash floods in the city of Zagreb

Ognjen Bonacci orcid.org/0000-0002-7123-3421 ; Sveučilište u Splitu, Fakultet građevinarstva, arhitekture i geodezije, Split, Hrvatska *
Tanja Roje-Bonacci ; Sveučilište u Splitu, Fakultet građevinarstva, arhitekture i geodezije, Split, Hrvatska
Tatjana Vujnović ; Državni hidrometeorološki zavod, Zagreb, Hrvatska

* Corresponding author.

Abstract

Like many other cities in the world, the City of Zagreb faces increasingly destructive urban flash floods. The aim of this paper is a more accurate determination of their characteristics to enable more effective protection measures against them. Zo this end, a detailed analysis of two flash floods that occurred on 3/4 July 1989 and 24/25 July 2020 was used. The formation of flash floods in Zagreb is specific, since they are partly a result of torrential flooding by mountain streams flowing down from Mt. Medvednica into the urban area. Based on a small number of available data, an attempt was made to define the effectiveness of the retention storage built on the Črnomerec
watercourse in mitigating floods downstream of the dam. It was determined that flash floods in Zagreb mostly occur in the warm period of the year, from June to August, during the night, from 9 pm to 1 am.

Keywords

urban flash floods, Zagreb, torrential streams on Mt. Medvednica, floods in July 1989 and 2020

Hrčak ID:

339873

URI

https://hrcak.srce.hr/339873

Publication date:

2.4.2025.

Article data in other languages: croatian german

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