Characterizing precipitation events leading to surface water flood damage over large regions of complex terrain

Bernet, Daniel Benjamin; Trefalt, Simona; Martius, Olivia; Weingartner, Rolf; Mosimann, Markus; Röthlisberger, Veronika Eva; Zischg, Andreas Paul (2019). Characterizing precipitation events leading to surface water flood damage over large regions of complex terrain. Environmental Research Letters, 14(6), 064010. IOP Publishing 10.1088/1748-9326/ab127c

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Surface water floods (SWFs) that lead to household losses are mainly localized phenomena. Research on describing the associated precipitation characteristics has previously been based on case studies and on the derivation of local rainfall thresholds, but no approaches have yet been presented on the national scale. Here, we propose a new way to overcome this scaling problem.Welinked a gridded precipitation dataset based on both rainfall gauges and radar data with geolocated insurance claims for all of Switzerland.Weshow that the absolute thresholds vary markedly over complex terrain, and we thus propose basing early warning systems for predicting damage-relevant SWFevents on local quantiles of maximum intensity and the total sum of event precipitation. A threshold model based on these two parameters is able to classify rainfall events potentially leading to damage-relevant SWF events over large areas of complex terrain, including high mountains and lowland areas, and a variety of geological conditions. Our approach is an important step towards the development of impact-based early warning systems. Weather warning agencies or insurance companies can build upon These findings to find workarounds for issuing user-targeted warnings at national scale or for nowcasting purposes.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geography
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Hydrology
08 Faculty of Science > Institute of Geography > Physical Geography > Unit Impact
08 Faculty of Science > Institute of Geography > Physical Geography

UniBE Contributor:

Bernet, Daniel Benjamin; Trefalt, Simona Esther; Romppainen-Martius, Olivia; Weingartner, Rolf; Mosimann, Markus; Röthlisberger, Veronika Eva and Zischg, Andreas Paul

Subjects:

500 Science > 550 Earth sciences & geology
900 History > 910 Geography & travel

ISSN:

1748-9326

Publisher:

IOP Publishing

Projects:

[245] Mobiliar Lab für Naturrisiken Official URL

Language:

English

Submitter:

Hélène Christine Louise Barras

Date Deposited:

18 Sep 2019 14:41

Last Modified:

26 Oct 2019 11:12

Publisher DOI:

10.1088/1748-9326/ab127c

Uncontrolled Keywords:

surface water floods, insurance damage claim data, precipitation, impact-oriented early warning systems

BORIS DOI:

10.7892/boris.133243

URI:

https://boris.unibe.ch/id/eprint/133243

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