Show simple item record

dc.contributor.author
Walter, Fabian
dc.contributor.author
Burtin, Arnaud
dc.contributor.author
McArdell, Brian W.
dc.contributor.author
Hovius, Niels
dc.contributor.author
Weder, Bianca
dc.contributor.author
Turowski, Jens M.
dc.date.accessioned
2017-08-17T07:26:24Z
dc.date.available
2017-06-12T15:26:06Z
dc.date.available
2017-08-17T07:26:24Z
dc.date.issued
2017-06-22
dc.identifier.issn
1561-8633
dc.identifier.issn
1684-9981
dc.identifier.other
10.5194/nhess-2016-321
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/122290
dc.identifier.doi
10.3929/ethz-b-000122290
dc.description.abstract
Heavy precipitation can mobilize tens to hundreds of thousands of cubic meters of sediment in steep Alpine torrents in a short time. The resulting debris flows (mixtures of water, sediment and boulders) move downstream with velocities of several meters per second and have a high destruction potential. Warning protocols for affected communities rely on raising awareness about the debris-flow threat, precipitation monitoring and rapid detection methods. The latter, in particular, is a challenge because debris-flow-prone torrents have their catchments in steep and inaccessible terrain, where instrumentation is difficult to install and maintain. Here we test amplitude source location (ASL) as a processing scheme for seismic network data for early warning purposes. We use debris-flow and noise seismograms from the Illgraben catchment, Switzerland, a torrent system which produces several debris-flow events per year. Automatic in situ detection is currently based on geophones mounted on concrete check dams and radar stage sensors suspended above the channel. The ASL approach has the advantage that it uses seismometers, which can be installed at more accessible locations where a stable connection to mobile phone networks is available for data communication. Our ASL processing uses time-averaged ground vibration amplitudes to estimate the location of the debris-flow front. Applied to continuous data streams, inversion of the seismic amplitude decay throughout the network is robust and efficient, requires no manual identification of seismic phase arrivals and eliminates the need for a local seismic velocity model. We apply the ASL technique to a small debris-flow event on 19 July 2011, which was captured with a temporary seismic monitoring network. The processing rapidly detects the debris-flow event half an hour before arrival at the outlet of the torrent and several minutes before detection by the in situ alarm system. An analysis of continuous seismic records furthermore indicates that detectability of Illgraben debris flows of this size is unaffected by changing environmental and anthropogenic seismic noise and that false detections can be greatly reduced with simple processing steps.
en_US
dc.language.iso
en
en_US
dc.publisher
European Geosciences Union
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Rapid detection and location of debris flow initiation at Illgraben, Switzerland
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 3.0 Unported
dc.date.published
2016-10-13
ethz.journal.title
Natural Hazards and Earth System Sciences
ethz.journal.volume
17
en_US
ethz.journal.issue
6
en_US
ethz.journal.abbreviated
Nat. hazards earth syst. sci.
ethz.pages.start
939
en_US
ethz.pages.end
955
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Glacial Hazard Monitoring with Seismology (GlaHMSeis)
en_US
ethz.identifier.nebis
004552015
ethz.publication.place
Goettingen
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::09558 - Walter, Fabian (SNF-Professur) / Walter, Fabian (SNF-Professur)
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::09558 - Walter, Fabian (SNF-Professur) / Walter, Fabian (SNF-Professur)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02611 - V. Wasserbau, Hydrologie u. Glaziologie / Lab. Hydraulics,Hydrology,Glaciology::09558 - Walter, Fabian (SNF-Professur) / Walter, Fabian (SNF-Professur)
ethz.grant.agreementno
157551
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
SNF-Förderungsprofessuren Stufe 2
ethz.date.deposited
2017-06-12T15:30:10Z
ethz.source
ECIT
ethz.identifier.importid
imp593654d7ddc7f46229
ethz.ecitpid
pub:184580
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2017-08-17T07:26:41Z
ethz.rosetta.lastUpdated
2018-11-05T16:49:17Z
ethz.rosetta.versionExported
true
ethz.COinS
ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.atitle=Rapid%20detection%20and%20location%20of%20debris%20flow%20initiation%20at%20Illgraben,%20Switzerland&rft.jtitle=Natural%20Hazards%20and%20Earth%20System%20Sciences&rft.date=2017-06-22&rft.volume=17&rft.issue=6&rft.spage=939&rft.epage=955&rft.issn=1561-8633&1684-9981&rft.au=Walter,%20Fabian&Burtin,%20Arnaud&McArdell,%20Brian%20W.&Hovius,%20Niels&Weder,%20Bianca&rft.genre=article&
 Search via SFX

Files in this item

Thumbnail

Publication type

Show simple item record