Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Nederbördsintensitet och andra faktorer som påverkar skyfallsskador
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Centre for Climate and Safety (from 2013).
2018 (Swedish)Licentiate thesis, comprehensive summary (Other academic)Alternative title
Rainfall intensity and other flood damage affecting factors (English)
Abstract [sv]

I Sverige inträffar många skyfall och intensiva regn under sommarmånaderna. Det finns inga uppenbara geografiska mönster, vilket är en skillnad gentemot älv- eller sjööversvämningar där det vanligtvis är känt vilka områden som kan komma att översvämmas vid en viss vattennivå eller ett visst vattenflöde. För individer och samhällsaktörer innebär en skyfallshändelse i många fall en stor överraskning då skyfall utvecklas snabbt och dagens meteorologiska prognossystem i stort inte lyckas att prognosticera extrema regn korrekt med avseende på mängd, tid och plats. Vädervarningar kommer med kort varsel eller uteblir helt. Konsekvenserna av intensiv nederbörd och skyfall är främst översvämningar och erosionsskador på byggnader och infrastruktur, men även störningar och avbrott i olika samhällsfunktioner som kan påverka samhället och individer utanför det drabbade området.

I denna avhandling har 15 år av försäkringsskadedata använts för att undersöka samband mellan nederbördsintensitet och skyfallsskador. Även påverkan av andra faktorer som topografi, bebyggelse och socioekonomiska aspekter har undersökts. Resultaten visar att regnintensitet under ett 60 minuters intervall i kombination med korta perioder av extrem intensitet, tillsammans med topografiska faktorer spelar en betydande roll vid uppkomsten av skador.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2018. , p. 49
Series
Karlstad University Studies, ISSN 1403-8099 ; 2018:56
Keywords [en]
urban flood, rainfall intensity, insured flood loss, flood damage function, GIS
Keywords [sv]
urban översvämning, nederbördsintensitet, försäkringsskador, skadefunktion, GIS
National Category
Other Earth and Related Environmental Sciences
Research subject
Risk and Environmental Studies
Identifiers
URN: urn:nbn:se:kau:diva-70173ISBN: 978-91-7063-897-8 (print)ISBN: 978-91-7063-992-0 (electronic)OAI: oai:DiVA.org:kau-70173DiVA, id: diva2:1264233
Presentation
2019-01-11, 21A347, Karlstads universitet, Karlstad, 10:00 (Swedish)
Opponent
Supervisors
Funder
Länsförsäkringar ABAvailable from: 2018-12-11 Created: 2018-11-19 Last updated: 2018-12-11Bibliographically approved
List of papers
1. The impact of intense rainfall on insurance losses in two Swedish cities
Open this publication in new window or tab >>The impact of intense rainfall on insurance losses in two Swedish cities
2018 (English)In: Journal of Flood Risk Management, ISSN 1753-318X, E-ISSN 1753-318X, Vol. 12, no S2, p. 1-13, article id e12504Article in journal (Refereed) Published
Abstract [en]

While a major part of previous research in the field of flood damage has focused on water depth as the most important causal factor, little attention has been paid to the role of rainfall intensity. As a test, this paper used correlation and regression analyses to investigate rainfall intensity as a factor affecting flood damage. For a time period of 15 years, the relationship between insurance losses caused by floods and rainfall intensity data from rain gauges were examined in two Swedish cities. Another objective was to find an approach for damage functions based on rainfall intensity as explanatory variable. Using linear regression, two approaches with considerable high degrees of explanation were found – one based on an exponential function and one on a power function. Using a lower limit for rainfall intensity, the approaches reached degrees of explanation between 30 and 78 %. From this study it was concluded that rainfall intensity during the summer months and the occurrence of insurance damages per day caused by floods were correlated and further that rainfall intensity has a great potential to explain urban flood damages. In the future, additional studies are needed to validate the proposed methods and integrate other flood damage affecting factors in the approach.

Place, publisher, year, edition, pages
Hoboken: Wiley-Blackwell, 2018
Keywords
flash flood, flood damage, flood damage function, insured flood loss, rainfallintensity, urban flood, skyfall, översvämningar, regnintensitet, försäkringsskador
National Category
Other Earth and Related Environmental Sciences
Research subject
Risk and Environmental Studies
Identifiers
urn:nbn:se:kau:diva-70169 (URN)10.1111/jfr3.12504 (DOI)
Funder
Länsförsäkringar AB
Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2019-11-14Bibliographically approved
2. A GIS-based multivariate approach to identify flood damage affecting factors
Open this publication in new window or tab >>A GIS-based multivariate approach to identify flood damage affecting factors
(English)Manuscript (preprint) (Other academic)
Abstract [en]

This paper investigates causal factors leading to pluvial flood damages, beside rainfall amount and intensity, in two Swedish cities. Observed flood damage data from a Swedish insurance database, collected under 13 years, and a set of spatial data, describing topography, demography, land cover and building type were analyzed through principal component analysis (PCA). The topographic wetness index (TWI) is the only investigated variable that indicates a significant relationship with to the number and amount of insurance damage. The Pearson correlation coefficient is 0.68 for the number of insurance damages and 0.63 for amount of insurance damages. With a linear regression model TWI explained 41% of the variance of the number of insurance flood damages and 34% of variance of amount of insurance flood damage.

Future studies on this topic should consider implementing TWI as a potential measure in urban flood risk analyses.

National Category
Other Earth and Related Environmental Sciences
Research subject
Risk and Environmental Studies
Identifiers
urn:nbn:se:kau:diva-70171 (URN)10.5194/nhess-2018-286 (DOI)
Funder
Länsförsäkringar AB
Note

This discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). The manuscript was not accepted for further review after discussion.

Available from: 2018-11-19 Created: 2018-11-19 Last updated: 2019-04-29Bibliographically approved

Open Access in DiVA

fulltext(3627 kB)83 downloads
File information
File name FULLTEXT02.pdfFile size 3627 kBChecksum SHA-512
95eaf02faff55e8cbef1d11904eed5e5dec8c397b6711d7927dfdeccc4d81896f23281e1daac41c6d76f0b0cc5639ff4cab9c742e3f0ee2c08f926aceb091e74
Type fulltextMimetype application/pdf

Authority records BETA

Blumenthal, Barbara

Search in DiVA

By author/editor
Blumenthal, Barbara
By organisation
Centre for Climate and Safety (from 2013)
Other Earth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 83 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 514 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf