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TitleThe working classification of landslides: material matters
AuthorCouture, R; Cruden, D M
SourceProceedings of the 64th Canadian Geotechnical Conference & 11th PanAmerican Conference on Soil Mechanics; 2011 p. 1-7
Alt SeriesEarth Sciences Sector, Contribution Series 20110041
Meeting64th Canadian Geotechnical Conference & 11th PanAmerican Conference on Soil Mechanics; Toronto; CA; October 2-6, 2011
Subjectsengineering geology; landslide deposits; landslides; slope deposits; terrain inventories; soil classification; debris flows; debris flow deposits
Illustrationsphotographs; flow charts; drawings
ProgramNational Guidelines for Natural Hazard Assessment and Mitigation, Public Safety Geoscience
AbstractThe nomenclature established by the Working Party for World Landslide Inventory has become the basis for an emerging consensus on landslide classification. This Working Classification encompasses seven mutually exclusive descriptors of the state of activity of the landslide, seven of the distribution of movements and five to describe the style of activity. The velocity of the movements can be described from an open-ended, seven division scale, ranging from extremely slow to extremely rapid. The material displaced may be rock, debris or earth with a range of four qualitatively-estimated water contents. We suggest additions to the Classification, additional states of activity preceding displacements and inclusion of frozen water in the description of water content. An International Standard allows earth to be divided into sand, silt, and clay. Careful documentation of these additions would lead to more comprehensive landslide characterization and better management of landslide risk.