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Numerical Simulation of Debris Flows Triggered from the Strug Rock Fall Source Area, W Slovenia
Mikoš, Matjaž (Avtor), Fazarinc, Rok (Avtor), Majes, Bojan (Avtor), Rajar, Rudolf (Avtor), Žagar, Dušan (Avtor), Krzyk, Mario (Avtor), Hojnik, Tomaž (Avtor), Četina, Matjaž (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://drugg.fgg.uni-lj.si/3760/ Novo okno
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Izvleček
The Strug landslide was triggered in December 2001 as a rockslide, followed by a rock fall. In 2002, about 20 debris flows were registered in the Kosec village; they were initiated in the Strug rock fall source area. They all flowed through the aligned Brusnik channel, which had been finished just before the first debris flow reached the village in April 2002. Debris flow events were rainfall-induced but also governed by the availability of rock fall debris in its zone of accumulation. After 2002 there was not enough material available for further debris flows to reach the village. Nevertheless, a decision was reached to use mathematical modeling to prepare a hazard map for the village for possible new debris flows. Using the hydrological data of the Brusnik watershed and the theological characteristics of the debris material, 5 different scenarios were defined with the debris flow volumes from 1000 m(3) to a maximum of 25 000 m(3). Two mathematical models were used, a one-dimensional model DEBRIF-1D, and a two-dimensional commercially available model FLO-2D. Due to the lack of other field data, data extracted from available professional films of debris flows in 2002 in the Kosec village were used for model calibration. The computational reach was put together from an 800-m long upstream reach and 380-m long regulated reach of the Brusnik channel through the village of Kosec. Both mathematical models have proved that the aligned Brusnik channel can convey debris flows of the volume up to 15 000 m(3). Under the most extreme scenario a debris flow with 25 000 m3 would locally spill over the existing levees along the regulated Brusnik channel. For this reason, additional river engineering measures have been proposed, such as the raising of the levees and the construction of a right-hand side sedimentation area for debris flows at the downstream end of the regulated reach.

Jezik:Angleški jezik
Ključne besede:debris flows, mathematical modelling, complex landslides, hazard assessment, torrent control, sensitivity analysis
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FGG - Fakulteta za gradbeništvo in geodezijo
Leto izida:2006
Založnik:European Geosciences Union
Št. strani:str. 261-270
Številčenje:Vol. 6, No. 2
UDK:556:624
ISSN pri članku:1561-8633
COBISS.SI-ID:3077729 Povezava se odpre v novem oknu
Število ogledov:351
Število prenosov:133
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
Skupna ocena:(0 glasov)
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Gradivo je del revije

Naslov:Natural hazards and earth system sciences
Skrajšan naslov:Nat. hazards earth syst. sci.
Založnik:European Geophysical Society
ISSN:1561-8633
COBISS.SI-ID:2666081 Novo okno

Sekundarni jezik

Jezik:Angleški jezik
Ključne besede:drobirski tokovi, matematično modeliranje, kompleksni zemeljski plazovi, ocena tveganja, urejanje hudournikov, analiza občutljivosti

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