Validation of 2D flood models with insurance claims

Zischg, Andreas Paul; Mosimann, Markus; Bernet, Daniel Benjamin; Röthlisberger, Veronika (2018). Validation of 2D flood models with insurance claims. Journal of hydrology, 557, pp. 350-361. Elsevier 10.1016/j.jhydrol.2017.12.042

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Flood impact modelling requires reliable models for the simulation of flood processes. In recent years, flood inundation models have been remarkably improved and widely used for flood hazard simulation, flood exposure and loss analyses. In this study, we validate a 2D inundation model for the purpose of flood exposure analysis at the river reach scale. We validate the BASEMENT simulation model with insurance claims using conventional validation metrics. The flood model is established on the basis of available topographic data in a high spatial resolution for four test cases. The validation metrics were calculated with two different datasets; a dataset of event documentations reporting flooded areas and a dataset of insurance claims. The model fit relating to insurance claims is in three out of four test cases slightly lower than the model fit computed on the basis of the observed inundation areas. This comparison between two independent validation data sets suggests that validation metrics using insurance claims can be compared to conventional validation data, such as the flooded area. However, a validation on the basis of insurance claims might be more conservative in cases where model errors are more pronounced in areas with a high density of values at risk.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Zischg, Andreas Paul; Mosimann, Markus; Bernet, Daniel Benjamin and Röthlisberger, Veronika Eva

ISSN:

0022-1694

Publisher:

Elsevier

Projects:

[245] Mobiliar Lab für Naturrisiken Official URL

Language:

English

Submitter:

Hélène Christine Louise Barras

Date Deposited:

01 May 2018 14:35

Last Modified:

01 May 2018 14:35

Publisher DOI:

10.1016/j.jhydrol.2017.12.042

Uncontrolled Keywords:

2D flood model, Validation, Insurance claims, Model performance

BORIS DOI:

10.7892/boris.110704

URI:

https://boris.unibe.ch/id/eprint/110704

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