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http://dx.doi.org/10.7854/JPSK.2017.26.1.55

Lahar Simulation on Ulleung Island Using Laharz_py Program  

Chang, Cheolwoo (Department of Earth Science, Pusan National University)
Yun, Sung-Hyo (Department of Earth Science Education, Pusan National University)
Publication Information
The Journal of the Petrological Society of Korea / v.26, no.1, 2017 , pp. 55-62 More about this Journal
Abstract
A Lahar on the volcanic area is one of the important hazard that can cause the loss of life and property damage. In order to estimate lahar hazard area at Ulleung Island, we simulated lahar inundation area using Laharz_py. We assumed 400 m of additional elevation for DEM to draw proximal hazard zone of Ulleung Island that H/L ratio were selected 0.45 and 0.5. And lahar volumes for simulation were estimated to 30,000, 50,000, 70,000, $100,000m^3$, respectively. In the results, 5 streams are located near a proximal hazard zone, Jeodong (east), Sadong and Okchon (southeast), Namyang (southwest), and Chusan (north), Nari basin is also considered that has a possibility of lahar during downpour. The results of this study can be used as basic data to make a hazard map for reduce the damage that can be caused by volcanic hazards occurred on Ulleung Island.
Keywords
Ulleung Island; Lahar; Laharz_py; Simulation; Proximal hazard zone boundary; Runout distance;
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Times Cited By KSCI : 2  (Citation Analysis)
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