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http://dx.doi.org/10.7780/kjrs.2009.25.5.445

Analysis of Landslide Characteristics of Inje Area Using SPOT5 Images and GIS Analysis  

Oh, Che-Young (Department of Satellite Information Science, Pukyong National University)
Kim, Kyung-Tag (Korea Institute of Construction Technology)
Choi, Chul-Uong (Department of Satellite Information Science, Pukyong National University)
Publication Information
Korean Journal of Remote Sensing / v.25, no.5, 2009 , pp. 445-454 More about this Journal
Abstract
Localized unprecedented torrential rain and heavy rainfall cause repeated damages and make it difficult to detect and predict the landslide caused by heavy rainfall. To analyze the landslide characteristics of Inje area this study used satellite images photographed after the occurrence of landslide caused by the typhoon Ewiniar occurred in July, 2006, and for GIS analysis purpose, interpreted the satellite images (SPOT5) visually to digitize into developing parts, water traveling parts and sediment parts. For analysis of spatial characteristics, landslide areas obtained from visual interpretation of digital map, 3rd & 4th forest vegetation maps and detailed soil map and grids were overlaid and analyzed. As a result, in regard to topographic features, landslide occurred at places, of which average slope is $26.34^{\circ}$, had south, south-east, south-west aspects and average altitude of 627m. From hydrological analysis, it was found out that water traveling area rapidly spread approaching water traveling area and sediment area. From forest type analysis, it was found out that landslide occurrence was high in pine woods, and in terms of girth class attribute, landslide occurred in small-sized woods, in which the crown occupancy of trees that have the diameter at breast height, 6~16cm, was greater than 50%. From the analysis of soil series, landslide areas constitute 37.85% of OdF and 37.35% of SmF, which had sandy loam soil and excellent drainage capacity. Through this study, landslides in Inje area were characterized and SPOT5 images of 2.5m resolution could be used. But there was a difficulty in determining water traveling parts adjacent to urban area.
Keywords
satellite images; spot5; landslide; slope geometry; forest map; Gangwon-do;
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Times Cited By KSCI : 3  (Citation Analysis)
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