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http://dx.doi.org/10.13047/KJEE.2022.36.5.535

Reliability of Non-invasive Sonic Tomography for the Detection of Internal Defects in Old, Large Trees of Pinus densiflora Siebold & Zucc. and Ginkgo biloba L.  

Son, Ji-Won (Div. of Natural Heritage, National Research Institute of Cultural Heritage)
Lee, Gwang-Gyu (Div. of Natural Heritage, National Research Institute of Cultural Heritage)
An, Yoo-Jin (Div. of Natural Heritage, National Research Institute of Cultural Heritage)
Shin, Jin-Ho (Div. of Natural Heritage, National Research Institute of Cultural Heritage)
Publication Information
Korean Journal of Environment and Ecology / v.36, no.5, 2022 , pp. 535-549 More about this Journal
Abstract
Damage to forests, such as broken or falling trees, has increased due to the increased intensity and frequency of abnormal climate events, such as strong winds and heavy rains. However, it is difficult to respond to them in advance based on prediction since structural defects such as cavities and bumps inside trees are difficult to identify with a visual inspection. Non-invasive sonic tomography (SoT) is a method of estimating internal defects while minimizing physical damage to trees. Although SoT is effective in diagnosing internal defects, its accuracy varies depending on the species. Therefore, it is necessary to analyze the reliability of its measurement results before applying it in the field. In this study, we measured internal defects in wood by cross-applying destructive resistance micro drilling on old Pinus densifloraSiebold & Zucc. and Ginkgo bilobaL., which are representative tree species in Korea, to verify the reliability of SoT and compared the evaluation results. The t-test for the mean values of the defect measurement between the two groups showed no statistically significant difference in pine trees and some difference in ginkgo trees. Linear regression analysis results showed a positive correlation with an increase in defects in SoT images when the defects in the drill resistance graph increased in both species.
Keywords
NON-INVASIVE MEASUREMENT; RESISTANCE MICRO-DRILLING; ACOUSTIC TOMOGRAPHY; PiCUS 3;
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