L773:1561 8633 OR L773:1684 9981
Search: L773:1561 8633 OR L773:1684 9981 > (2010-2014) > Empirical atmospher...
- 6 of 7
- Previous record
- Next record
- To hitlist
- Turkington, Thea (author)
Empirical atmospheric thresholds for debris flows and flash floodsin the southern French Alps
- Article/chapterEnglish2014
Publisher, publication year, extent ...
- 2014-06-18
- Copernicus GmbH,2014
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:uu-297160
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-297160URI
- https://doi.org/10.5194/nhess-14-1517-2014DOI
Supplementary language notes
- Language:English
- Summary in:English
Part of subdatabase
- SwePubSwePub
Classification
Notes
- Debris flows and flash floods are often preceded by intense, convective rainfall. The establishment of reliable rainfall thresholds is an important component for quantitative hazard and risk assessment, and for the development of an early warning system. Traditional empirical thresholds based on peak intensity, duration and antecedent rainfall can be difficult to verify due to the localized character of the rainfall and the absence of weather radar or sufficiently dense rain gauge networks in mountainous regions. However, convective rainfall can be strongly linked to regional atmospheric patterns and profiles. There is potential to employ this in empirical threshold analysis. This work develops a methodology to determine robust thresholds for flash floods and debris flows utilizing regional atmospheric conditions derived from ECMWF ERA-Interim reanalysis data, comparing the results with rain-gauge-derived thresholds. The method includes selecting the appropriate atmospheric indicators, categorizing the potential thresholds, determining and testing the thresholds. The method is tested in the Ubaye Valley in the southern French Alps (548 km2), which is known to have localized convection triggered debris flows and flash floods. This paper shows that instability of the atmosphere and specific humidity at 700 hPa are the most important atmospheric indicators for debris flows and flash floods in the study area. Furthermore, this paper demonstrates that atmospheric reanalysis data are an important asset, and could replace rainfall measurements in empirical exceedance thresholds for debris flows and flash floods.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
- Ettema, Janneke (author)
- van Westen, Cees (author)
- Breinl, Korbinian (author)
Related titles
- In:Natural hazards and earth system sciences: Copernicus GmbH14, s. 1517-15301561-86331684-9981
Internet link
Find in a library
- Natural hazards and earth system sciences (Search for host publication in LIBRIS)
To the university's database
- 6 of 7
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Turkington, Thea
- Ettema, Janneke
- van Westen, Cees
- Breinl, Korbinia ...
- About the subject
-
- NATURAL SCIENCES
- NATURAL SCIENCES
- and Earth and Relate ...
- and Meteorology and ...
- Articles in the publication
- Natural hazards ...
- By the university
- Uppsala University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
