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Hazard Zoning for Landslides Connected to Torrential Floods in the Jerte Valley (Spain) by using GIS Techniques

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Carrasco González, Rosa María and Pedraza Gilsanz, Javier de and Martín Duque, José Francisco and Mattera, Massimo and Sanz Santos, Miguel Angel and Bodoque del Pozo, José María (2003) Hazard Zoning for Landslides Connected to Torrential Floods in the Jerte Valley (Spain) by using GIS Techniques. Natural Hazards, 30 . pp. 361-381. ISSN 0921-030X

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Official URL: http://link.springer.com/journal/11069



Abstract

The Jerte Valley is a northeast-southwest tending graben located in the mountainous
region of west central Spain (Spanish Central System). Mass movements have been a predominant
shaping process on the Valley slopes during the Quaternary. Present day activity is characterized as
either ‘first-time failure’ (shallow debris slides and debris flows) or ‘reactivations’ of pre-existing
landslides deposits.
A delineation of landslide hazard zoning within the Valley has been carried out by using the detailed
documentation of a particular event (a debris slide and a sequel torrential flood, which occurred
on the Jubaguerra stream gorge), and GIS techniques. The procedure has had four stages, which are:
(1) the elaboration of a susceptibility map (spatial prediction) of landslides; (2) the elaboration of a
map of ‘restricted susceptibility’ in the particular case of slopes that are connected to streams and
torrents (gorges); (3) the elaboration of a digital model which relates the altitude to the occurrence
probability of those particular precipitation conditions which characterized the Jubaguerra event and
(4) the combination of the probability model with the ‘restricted susceptibility map’, to establish
‘critical zones’ or areas which are more prone to the occurrence of phenomena that have same
typology as this one.


Item Type:Article
Uncontrolled Keywords:Spanish Central System, Debris slide, Debris flow, Torrential flood, Digital precipitation, Models, Geographic Information Systems
Subjects:Sciences > Geology > Geodynamics
ID Code:20085
Deposited On:22 Feb 2013 09:46
Last Modified:23 Apr 2015 11:41

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