Abstract
There are many landslide and landfalls in Nepal due to the geological, topographycal, climatological and human activities reasons. The authors have carried out the investigations to clarify the relationship between landslides, landfalls and geological, distributional characters. In addition, prevention methods of these natural hazards are surveyed with twenty (20) of roads from January to June, 1992. As a results of the survey, following items are confirmed. 1) Geological distribution of landslides and landfalls in Nepal are mainly occurring at Siwalik (Sw), Nuwakot (Nw) and Kathmandu (Ka) group. 2) Landslide and landfall in Nepal are categorized largely into five (5) types (A, B, C, D, E) . 3) Installation of Gabion Retaining Wall and Concrete Retaining Wall are most popular prevention methods in Nepal. However, these average of actual prevention ratio for each roads are not so effective due to shortage of the national budget.
