Application of quantified risk analysis in landslide risk management practice: Hong Kong experience

Reliability Analysis of Slope Under Rainfall

“…The method for runout analysis often includes the empirical methods developed based on historical analysis of past data, or approaches based on detailed mechanics analysis. In practice, the most reliable way to determine such parameters seems to be back analysis of case histories (e.g., Ho and Ko, 2009). For instance, noticing that large landslides tend to have larger mobility, Corominas (1996) While being simple to apply, most empirical models can only predict the travel distance of a landslide.…”

“…As such, a useful clue to find the acceptance criteria for landslide risk is to compare the risk posed by a landslide with those associated with other hazards. As an example, Figure 7.44 shows the societal risk criteria employed in Hong Kong (Ho and Ko, 2009). In this table, voluntary risk refers to risk associated with activities in which a person participates by choice, and involuntary risks are associated with activities, conditions, or events to which a person might be exposed without his consent (Starr, 1969).…”

Forensic landslide investigations in Hong Kong

“…In addition, landslide investigations have contributed to making technical advances in the assessment of debris mobility, evaluation of annual failure rates of different slope types which serve as inputs to quantitative risk assessments, 31 and refinement of the rainfalllandslide correlations for landslip warnings.…”

Slope stability analysis in the Three Gorges Reservoir Area considering effect of antecedent rainfall

“…Landslides are one of the most common natural hazards (Ho and Ko 2009). Statistical data show that most of the landslides occurred during or after the rainfall.…”