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http://dx.doi.org/10.14578/jkfs.2011.100.2.16

Analysis of the Relationship Between the Characteristics of the Wind Damaged Trees and the Wind Caused by Typhoon 'Kompasu'  

Youn, Ho Joong (Department of Forest Conservation, Korea Forest Research Institute)
Park, Ki Hyung (Department of Forest Conservation, Korea Forest Research Institute)
Lee, Myungbo (Department of Forest Conservation, Korea Forest Research Institute)
Won, Myoungsoo (Department of Forest Conservation, Korea Forest Research Institute)
Kim, Kyongha (Department of Forest Conservation, Korea Forest Research Institute)
Publication Information
Journal of Korean Society of Forest Science / v.100, no.2, 2011 , pp. 246-255 More about this Journal
Abstract
This study was carried out to investigate the characteristics of wind damaged trees in the Hongneung Arboretumin Korea. Many trees in the Hongneung Arboretum were damaged by the 'Kompasu', the seventh typhoon in the year of 2010 having strong impacts on the central region of Korea. Damaged trees were divided into 3 damage types: windthrow, slanted and broken trees. Most of damaged trees (97.3%) were found at low slope (below 15 degree) or medium slope (15~20 degree). The 45.3% of damaged trees were coniferous and 54.7% were deciduous trees. The wind speed was recorded for the duration of the typhoon from 04:00 AM to 12:00 PM on September 2. The average wind speed and the maximum instantaneous wind speed inside the forest were 1.4 m/sec and 3.5 m/sec, respectively. The highest peak of the average and the maximum instantaneous wind speed inside of forest, 3.4 m/sec and 8.7 m/sec respectively, were recorded at 06:10 AM on September 2. To analyze relationship between wind characteristics and the damage types, the average wind speed and the frequency of wind wave was compared to those of pre-typhoon period (Feb. 13, Feb. 20, Apr. 21, Oct. 16, 2009 and Mar. 20, 2010). The results indicated that the damaged trees were affected by frequent wind wave rather than the wind speed itself. Also average wind direction inside the forest was analyzed to investigate the impact of wind direction on the damaged trees. The wind had mainly blown from SE and SW, and the maximum instantaneous wind direction was SE direction overall. Most of the damaged trees (84.0%) had fallen down to the NW or NE direction. This result showed that the fallen direction of the damaged trees and wind direction was highly related. Therefore, we found that the frequency of wind wave was the main factor of wind damages during the typhoon 'Kompasu' and wind direction was highly related to the fallen direction.
Keywords
Kompasu; wind damaged trees; wind wave; wind speed;
Citations & Related Records
연도 인용수 순위
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