Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility
Recent changes in global climate are showing their evident effects both in polar and alpine environments. The observed effects are various, with significant implications on natural hazard but also on the socio-economic context, with evident risk implications: reduced snow cover duration, glaciers re...
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ftunivtorino:oai:iris.unito.it:2318/141707 2023-10-25T01:42:45+02:00 Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility PALOMBA, MAURO GIARDINO, Marco Sara Ratto Paolo Pogliotti Mauro Palomba Marco Giardino Sara Ratto Paolo Pogliotti 2013 ELETTRONICO http://hdl.handle.net/2318/141707 eng eng FIST Federazione Italiana di Scienze della Terra country:ITA place:Roma ispartofbook:Epitome 2013 Geoitalia 2013 firstpage:159 lastpage:159 numberofpages:1 http://hdl.handle.net/2318/141707 info:eu-repo/semantics/closedAccess info:eu-repo/semantics/conferenceObject 2013 ftunivtorino 2023-09-26T22:28:19Z Recent changes in global climate are showing their evident effects both in polar and alpine environments. The observed effects are various, with significant implications on natural hazard but also on the socio-economic context, with evident risk implications: reduced snow cover duration, glaciers retreat, permafrost degradation as well as increased slope instability in high mountain areas. Geomorphological studies have been performed at a regional scale in the Aosta Valley Region (a small alpine region located in NW Italy) to better understand landslide spatial and temporal frequency and to investigate the main controlling factors of instability in high mountain areas of possible permafrost presence and subsequent degradation following climatic changes. A comparison between the high mountain areas and the rest of the territory has been also performed. A great amount of data has been collected and analyzed into a GIS system: different landslides inventories (IFFI Project National Database, Regional “Catasto Dissesti”), permafrost distribution maps and several geothematic maps produced within the research for the analysis of controlling factors of instability (i.e. slope and aspect maps derived from the Digital Elevation Model, for topographic factors, and some geological maps for litho-structural ones). Then, spatial analysis and statistical studies have been applied to 255 identified landslides within the areas with permafrost: mainly rock falls, corresponding to a landslide density equal to 0.48 events/km2 and a landslide index of 11%. Data considerably lower than the analogous values calculated for the whole region (respectively 1.18 events/km2 and 19%). Furthermore, in these areas it has been observed that, in terms of landslides mean areal extent, the obtained values are higher than those of the rest of the region for almost all types of movement (i.e. rock falls increase in the mean areal extent is more than 40%). Only in the case of Deep-seated Gravitational Slope Deformations the values are considerably ... Conference Object permafrost Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) |
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Open Polar |
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Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) |
op_collection_id |
ftunivtorino |
language |
English |
description |
Recent changes in global climate are showing their evident effects both in polar and alpine environments. The observed effects are various, with significant implications on natural hazard but also on the socio-economic context, with evident risk implications: reduced snow cover duration, glaciers retreat, permafrost degradation as well as increased slope instability in high mountain areas. Geomorphological studies have been performed at a regional scale in the Aosta Valley Region (a small alpine region located in NW Italy) to better understand landslide spatial and temporal frequency and to investigate the main controlling factors of instability in high mountain areas of possible permafrost presence and subsequent degradation following climatic changes. A comparison between the high mountain areas and the rest of the territory has been also performed. A great amount of data has been collected and analyzed into a GIS system: different landslides inventories (IFFI Project National Database, Regional “Catasto Dissesti”), permafrost distribution maps and several geothematic maps produced within the research for the analysis of controlling factors of instability (i.e. slope and aspect maps derived from the Digital Elevation Model, for topographic factors, and some geological maps for litho-structural ones). Then, spatial analysis and statistical studies have been applied to 255 identified landslides within the areas with permafrost: mainly rock falls, corresponding to a landslide density equal to 0.48 events/km2 and a landslide index of 11%. Data considerably lower than the analogous values calculated for the whole region (respectively 1.18 events/km2 and 19%). Furthermore, in these areas it has been observed that, in terms of landslides mean areal extent, the obtained values are higher than those of the rest of the region for almost all types of movement (i.e. rock falls increase in the mean areal extent is more than 40%). Only in the case of Deep-seated Gravitational Slope Deformations the values are considerably ... |
author2 |
Mauro Palomba Marco Giardino Sara Ratto Paolo Pogliotti |
format |
Conference Object |
author |
PALOMBA, MAURO GIARDINO, Marco Sara Ratto Paolo Pogliotti |
spellingShingle |
PALOMBA, MAURO GIARDINO, Marco Sara Ratto Paolo Pogliotti Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
author_facet |
PALOMBA, MAURO GIARDINO, Marco Sara Ratto Paolo Pogliotti |
author_sort |
PALOMBA, MAURO |
title |
Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
title_short |
Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
title_full |
Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
title_fullStr |
Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
title_full_unstemmed |
Geomorphological studies of slope instabilities in permafrost regions of the Aosta Valley (NW-Italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
title_sort |
geomorphological studies of slope instabilities in permafrost regions of the aosta valley (nw-italy): a statistic and cartographic approach to the analysis of landslide susceptibility |
publisher |
FIST Federazione Italiana di Scienze della Terra |
publishDate |
2013 |
url |
http://hdl.handle.net/2318/141707 |
genre |
permafrost |
genre_facet |
permafrost |
op_relation |
ispartofbook:Epitome 2013 Geoitalia 2013 firstpage:159 lastpage:159 numberofpages:1 http://hdl.handle.net/2318/141707 |
op_rights |
info:eu-repo/semantics/closedAccess |
_version_ |
1780739414462300160 |