Risk assessment on landslides focused on the role of the water: examples from model regions (Rio de Janeiro State and Hong Kong)

Abstract Landslides are one of the most vital natural hazards on Earth. To satisfy demand for protection against landslides, it is necessary to systematically assess and manage landslide risk. Landslide mechanisms related hydrology analyzed with focus in major risks, formal risk assessment methodologies presented paper. Issues discussed different steps described. The management accidents slopes discussed, particular emphasis Hong Kong Rio de Janeiro Brazil. a region China large population density very mountainous. There history tragic slopes. territory has tradition high standard practice slope engineering. establishment an efficient security system developed by Geotechnical Engineering Office was established territory. Also, specific aspects instability state city, cases which occurred mountainous State. mega-disaster that 2011, number deaths significant economic losses, studied incidence individual landslides.