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http://dx.doi.org/10.7843/kgs.2014.30.12.15

Rock Slope Failure Analysis and Landslide Risk Map by Using GIS  

Kwon, Hye-Jin (Resources development Division, Korea Resources Corporation)
Kim, Gyo-Won (Dept. of Geology, Kyungpook National Univ.)
Publication Information
Journal of the Korean Geotechnical Society / v.30, no.12, 2014 , pp. 15-25 More about this Journal
Abstract
In this study, types of rock slope failure are analyzed by considering both joint characteristics investigated on previous landslide regions located at northern part of Mt. Jiri and geographic features of natural slopes deduced from GIS. The landslide prediction map was produced by superposing the frequency ratio layers for the six geographic features including elevation, slope aspect, slope angle, shaded relief, curvature and stream distance, and then the landslide risk map was deduced by combination of the prediction map and the damage map obtained by taking account of humanity factors such as roads and buildings in the study area. According to analysis on geographic features for previous landslide regions, the landslides occurred as following rate: 88% at 330~710 m in elevation, 77.7% at $90{\sim}270^{\circ}$ in slope aspect, 93.9% at $10{\sim}40^{\circ}$ in slope angle, 82.78% at grade3~7 in shaded relief, 86.28% at -5~+5 in curvature, and 82.92% within 400m in stream distance. Approximately 75% of the landslide regions belongs to the region of 'high' or 'very high' grade in the prediction map, and 13.27% of the study area is exposed to 'high risk' of landslide.
Keywords
Landslide; GIS; Rock slope failure; Frequency ratio; Prediction map; Damage map; Risk map;
Citations & Related Records
Times Cited By KSCI : 11  (Citation Analysis)
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