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http://dx.doi.org/10.14578/jkfs.2020.109.1.62

Analysis of Tree-rings for Inference of Periods in which Slow-moving Landslides Occur  

Park, Jae-Hyeon (Department of Forest Resources, Gyeongnam National University of Science and Technology)
Park, Seonggyun (Department of Forest Resources, Gyeongnam National University of Science and Technology)
Publication Information
Journal of Korean Society of Forest Science / v.109, no.1, 2020 , pp. 62-71 More about this Journal
Abstract
With the aim of restoring slow-moving landslide areas, this study collected fundamental data from tree-ring analysis of curved trees in these areas. We collected both upper and lower stem disks to measure the azimuth angles of six trees with growth curvature caused by tension cracks. Additionally, we analyzed various factors in the slow moving landslide area. The geological strata and main constitutive rocks in the study area were anorthosite-formed in the Precambrian period; moreover, there were no intrusive rocks, other geological strata, geological folds, or faults. The talus with weathered rocks was distributed in the upper zone of the slow-moving landslide area. According to annual-ring analysis of curved trees and terrain analysis by satellite imagery, slow-moving landslide occurred from the top to the bottom end of the slope between 1999 and 2011. There was a significant relationship (P < 0.01) between the azimuth angle of cracks caused by the slow-moving landslide and the angle of the curved trees. These results suggest that the occurrence of slow-moving landslides could be confirmed through analysis of annual-rings of curved trees, underground water levels, and terrain (by satellite imagery).
Keywords
angle of curved trees; cracks; the slow - moving landslide; tree-rings;
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