Conceptual Definitions for Landslide Hazard, Modelling, and Risk Assessment
This glossary provides concise scientific explanations of key terms used in landslide hazard science, geomechanics, hydrology, and risk assessment research relevant to European environments.
Triggering Mechanisms
Rainfall Infiltration
Process by which precipitation penetrates soil or rock layers, reducing matric suction and increasing pore water pressure, potentially leading to slope instability.
Antecedent Moisture
Accumulated soil moisture condition prior to a rainfall event that influences slope response and failure probability.
Static Liquefaction
Loss of shear strength in granular materials due to rapid pore pressure increase under static loading conditions.
Permafrost Degradation
Progressive thawing of frozen ground materials that can reduce structural stability in high-altitude European mountain regions.
Geomechanical Modelling Terms
Hydromechanical Coupling
Interaction between hydraulic processes and mechanical deformation in soil or rock masses.
Richards Equation
Mathematical formulation used to model unsaturated water flow through porous media.
Mohr–Coulomb Stability Criterion
Classical soil mechanics model describing failure conditions based on cohesion and friction angle.
Progressive Failure
Sequential weakening and rupture propagation within a slope structure over time.
Shear Strength Reduction Method (SSRM)
Numerical stability evaluation technique used in finite element slope analysis.
Runout and Propagation Concepts
Runout Distance
Maximum downslope travel length of landslide material after failure initiation.
Rheological Flow Models
Mathematical descriptions of mass movement behaviour including frictional, Voellmy, and viscoplastic formulations.
Entrainment
Process by which moving landslide mass incorporates additional material during propagation, increasing volume and mobility.
Risk Assessment Terminology
Hazard
Probability of landslide occurrence within a defined spatial and temporal framework.
Exposure
Presence of people, infrastructure, or assets within potential landslide impact zones.
Vulnerability
Degree of damage expected when exposed elements are affected by landslide forces.
Quantitative Risk Assessment (QRA)
Mathematical estimation of risk using hazard probability, exposure level, and vulnerability functions.
Scientific Role of the Glossary
The glossary supports knowledge accessibility across research, engineering practice, and policy communication contexts related to European landslide risk science.
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