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Analysis of Rainfall Characteristics and Landslides at the West Side Area of Gangwon Province  

Yoo, Namjae (강원대학교 토목공학과)
Yoon, Daehee (강원대학교 토목공학과)
Um, Jaekyung (㈜비엔디코퍼레이션)
Kim, Donggun (강원대학교 토목공학과)
Park, Byungsoo (강원도립대학 건설토목과)
Publication Information
Journal of the Korean GEO-environmental Society / v.13, no.9, 2012 , pp. 75-82 More about this Journal
Abstract
This paper is the results of analysis for the causes and characteristics of landslide according to heavy rain occurred in west area of Gangwon province which is affected by typhoon such as Ewiniar and Bilis in 2006. West side of Gangwon province is topographically weak for the landslide and debris flow since it is covered by soil of weathered rock such as Gneiss and Granite. From the results of analysis for the rainfall characteristics, it was found that landslide occurrence is closely related to the accumulated rainfall amount less than 3 days. Furthermore, it was found that regional difference of occurrence frequency is effected by 1-hour maximum rainfall intensity. From the results of analysis for the landslide data of 860 locations occurred in west side, it was shown that failure mode was changed from transition slide to liquidity slide. Occurrence frequency was high at the slope angle of $20{\sim}30^{\circ}$ slope length of 11~20, and slope width of 6~10. Landslide of west side is the typical landslide of Gneiss and Granite and the type of small scale which has narrow slope width.
Keywords
Western side area of Gangwon; Heavy rainfall; Landslides; Accumulated rainfall; 1-Hour maximum rainfall intensity;
Citations & Related Records
연도 인용수 순위
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