ABSTRACT
Slope stability is an important part of earthworks design. An analytical approach is usually required. A factor of safety is a decision-making tool and varies with the type of project and the consequences resulting from the failure. Examples are provided of probability of failure and its consequences. Considerations for soil and rock slopes are outlined. Slope degradation is classed either as mass movement (slope instability) or as surficial erosion. The latter may initiate slope instability and is discussed. Quantitative risk analysis (QRA) is a tool used in landslide risk management (LRM). The LRM approach presents a sound method for developing a consistent risk category for slope asset management. Yet risk perception may govern in practice. Case studies are used to show (1) examples of LRM in practice; (2) the mechanism of a landslide failure; (3) a riverbank failure, and (4) the application of GIS for large area studies of slopes.
