A Case Study on Landslide Hazard Mapping in Changunarayan VDC, Nepal

摘要

An application of GIS for landslide hazard assessment using multivariate statistical analysis, mapping, and the evaluation of the hazard maps is presented. The study area is the Changunarayan VDC (8.19 km~2) located in the central region of Nepal and listed on the UNESCOs world heritage site in 1979 A.D., which is under pressure of high construction activities. Data used to construct the landslide hazard maps were obtained from published works, topographical and geological maps, satellite images and aerial photographs and other digital sources. To determine the factors and classes influencing land sliding, layers of topographic factors derived from a digital elevation model, geology, and landuse/land cover were analyzed and the results were used for hazard mapping. Hazard map of the study area shows 15.13 % area lies in the high hazard level, 53.87 % on moderate hazard level and 28.53 % in low hazard level.