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http://dx.doi.org/10.7843/kgs.2014.30.12.5

Landslide Triggering Rainfall Threshold Based on Landslide Type  

Lee, Ji-Sung (Dept. of Ocean Engrg., Pukyong National Univ.)
Kim, Yun-Tae (Dept. of Ocean Engrg., Pukyong National Univ.)
Song, Young-Karb (National Disaster Management Institute)
Jang, Dae-Heung (Dept. of Statistics, Pukyong National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.30, no.12, 2014 , pp. 5-14 More about this Journal
Abstract
Most of slope failures have taken place between June and September in Korea, which cause a considerable damage to society. Rainfall intensity and duration are very significant triggering factors for landslide. In this paper, landslide-triggering rainfall threshold consisting of rainfall intensity-duration (I-D) was proposed. For this study, total 255 landslides were collected in landslide inventory during 1999 to 2012 from NDMI (National Disaster Management Institute), various reports, newspapers and field survey. And most of the required rainfall data were collected from KMA (Korea Meteorological Administration). The collected landslides were classified into three categories: debris flow, shallow landslide and unconfirmed. A rainfall threshold was proposed based on landslide type using statistical method such as quantile-regression method. Its validation was carried out based on 2013 landslide database. The proposed rainfall threshold was also compared with previous rainfall thresholds. The proposed landslide-triggering rainfall thresholds could be used in landslide early warning system in Korea.
Keywords
Landslide; Debris flow; Rainfall intensity-duration threshold; Quantile-regression;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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