ABSTRACT
Hong Kong is located in a subtropical region with average annual rainfall of around 2300 mm. About 60% of the total land area in Hong Kong is hilly natural terrain. To reduce the landslide risk to an acceptable level, the Geotechnical Engineering Office (GEO) implements risk management measures for vulnerable natural hillside catchments near high-consequence facilities under the Landslip Prevention and Mitigation Programme (LPMitP). This paper highlights some of the recent advances in landslide risk management measures in Hong Kong, including: 1) two- and three-dimensional debris mobility analyses, 2) physical modelling of baffles as flow-impeding structures, 3) centrifuge modelling of debris-barrier interaction, 4) advanced numerical modelling of debris-barrier interaction, 5) staged debris mobility analysis for the design of multiple barriers, and 6) the use of cushioning materials to reduce bouldery debris impact load on rigid barriers.
