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7.18 Long-Runout Landslides


Korup, Oliver; Schneider, Demian; Huggel, Christian; Dufresne, Anja (2013). 7.18 Long-Runout Landslides. Amsterdam: Elsevier.

Abstract

This chapter provides an overview of large (>10⁶ m³) volcanic and nonvolcanic long-runout landslides characterized by high velocities, large release and deposit volumes, and excess runout. Large long-runout landslides are very rare events and pose substantial challenges to quantitative hazard assessments. Despite several mechanistic theories, there is no commonly agreed-upon explanation of excess runout, which would also entail superposition of processes such as dynamic fragmentation, material bulking, and partial lubrication. Water as a lubricant plays only a minor or limited role given the ample evidence of dry excess runout. Numerical models based on shallow water equations provide some of the best means to realistically simulate rapid flow- and avalanche-like motion over three-dimensional terrain. However, such models critically depend on reliable initial conditions, such as failure volume and scar, material properties, and runout topography.

This chapter provides an overview of large (>10⁶ m³) volcanic and nonvolcanic long-runout landslides characterized by high velocities, large release and deposit volumes, and excess runout. Large long-runout landslides are very rare events and pose substantial challenges to quantitative hazard assessments. Despite several mechanistic theories, there is no commonly agreed-upon explanation of excess runout, which would also entail superposition of processes such as dynamic fragmentation, material bulking, and partial lubrication. Water as a lubricant plays only a minor or limited role given the ample evidence of dry excess runout. Numerical models based on shallow water equations provide some of the best means to realistically simulate rapid flow- and avalanche-like motion over three-dimensional terrain. However, such models critically depend on reliable initial conditions, such as failure volume and scar, material properties, and runout topography.

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Additional indexing

Item Type:Published Research Report
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Date:2013
Deposited On:17 Dec 2013 08:20
Last Modified:05 Apr 2016 17:13
Publisher:Elsevier
ISBN:978-0-08-088522-3
Publisher DOI:https://doi.org/10.1016/B978-0-12-374739-6.00164-0
Official URL:http://www.sciencedirect.com/science/referenceworks/9780080885223

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