earticle

영어

Climate factors have been commonly recognized as a primary trigger of natural hazards, such as landslides, debris flows, floods, and drought. Paleoclimate records indicate how geomorphic systems related to natural hazards have responded to a range of environmental conditions in the past; thus, they provide essential data for predicting future climate patterns and potential hazards. A review of historical literature can be an effective method to investigate paleoclimatic records. In this study, we analyzed landslide-triggering rainfall events during the period of the Joseon Dynasty (1395–1902) using paleo-rainfall records corresponding to landslide occurrence; the characteristics of this era were then compared with those of a current period (1963-2012). Paleorainfall records (Chukwooki, Wootaek, keywords on storm event) corresponding to landslide occurrence were collected through a review of several historical literary works (Annals of the Joseon Dynasty, Gaksadeungnok, Daily Records of the Royal Secretariat of the Joseon Dynasty, Bibyeonsadeungnok) on the Joseon Dynasty. All paleorainfall data were converted into millimeters based on a certain standard and statistical analysis as described in previous studies. Results showed that the total amount, duration, and mean intensity of landslide-triggering rainfall ranged from 60–644 mm, 10–216 h, and 0.5-8.5 mm/h, respectively, in the Joseon Dynasty. Moreover, we found that the intensity-duration threshold for landslide-triggering rainfall during the Joseon Dynasty was similar to that during the current period.