A Study on Debris Flow Landslide Disasters and Restoration at Inje of Kangwon Province, Korea

Abstract

The main purpose of this work is to analyse damages caused by debris flows during the heavy rainfalls at Inje of Kangwon Province, Korea. A series of site investigations have been carried out to survey the characteristics of debris flows occurred during the summer season of 2006. It has been found that major losses in human life and property are caused by discharge of soil and rock fragments from landslides. During the rainfall high precipitation rate of 113.5 mm/hour and 355 mm/day was recorded, which could happen at 80-500 year period. Comparing the rainfall record with the time of landslides being occurred, occurrence of the landslides is directly related to heavy rainfalls. At present, several debris barriers have been built at the valleys and natural slopes have been protected by the seed spray method. It is intended to propose an alternative of restoration of landslide damages and maintenance based on findings from the current study.