Landslide risk assessment and acceptable risk

TLDR

The study defines risk and hazard concepts tailored to landslide risk assessment. The authors present methods for quantifying landslide risk and suggest qualitative definitions when quantitative measures are not feasible. The paper proposes acceptable risk thresholds for natural and man‑made slopes and illustrates their application through examples in landslide and debris‑flow affected regions. Keywords: landsliding, slope stability, risk assessment.

Abstract

Definitions for risk and hazard which are suited to landslide risk assessment are presented. Acceptable risk is discussed in relation to other risks accepted by the community, and acceptable specific risks are proposed, depending on whether the landsliding is natural or sliding of a man-made slope. Methods for quantifying the risk are discussed, and qualitative definitions are suggested for use when these are desirable. Examples are given of use of risk assessment in areas affected by landsliding and debris flows. Key words : landsliding, slope stability, risk assessment.