inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Rock slope instability assessment using spatially distributed structural orientation data in Darjeeling Himalaya (India)

Auteur(s) et Affiliation(s)

GHOSH, S.
Dep. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas
Engineering Geology Division, Geological Survey of India, Eastern Region, Kolkata, Inde
GÜNTHER, A.
Federal Inst. for Geosciences and Natural Resources (BGR), Hanover, Allemagne
CARRANZA, E.J.M.
Dep. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas
VAN WESTEN, C.J.
Dep. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas
JETTEN, V.G.
Dep. of Earth System Analysis, Fac. of Geo-Information Science and Earth Observation (ITC), Univ. of Twente, Enschede, Pays-Bas


Description :
The AA. discuss a geographic information system (GIS)-based methodology for rock slope instability assessment based on geometrical relationships between topographic slopes and structural discontinuities in rocks. The methodology involves (a) regionalization of point observations of orientations (azimuth and dip) of structural discontinuities in rocks in order to generate a digital structural model (DStM), (b) testing the kinematical possibility of specific modes of rock slope failures by integrating DStMs and digital elevation model (DEM)-derived slope and aspect data and (c) computation of stability scenarios with respect to identified rock slope failure modes. The methodology is tested in Darjeeling Himalaya. Results of scenario-based analysis show that, in rock slopes classified to be unstable, stress-induced rock slope instability tends to increase with increasing level of water saturation.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 15, p. 1773-1792, nombre de pages : 20, Références bibliographiques : 50 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)