솎아베기 강도가 리기다소나무림의 산불연료 수직적 분포에 미치는 영향 - 수관층 연료를 중심으로 -
The Effects of Thinning Intensity on Vertical Distribution of Wildfire Fuel in Pinus rigida Stands - Focused on the Crown Fuel Characteristics -
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초록
본 연구에서는 솎아베기 강도가 리기다소나무림의 산불 수관연료 수직적 분포에 미치는 영향을 분석하고자 하였다. 이를 위하여 솎아베기가 실시된 충남 예산지역 리기다소나무림을 대상으로 총20본의 임목를 벌채하여 수관연료의 수직분포 모델을 개발하였으며, 개발된 모델을 이용하여 솎아베기 강도에 따른 수관연료의 수직적 분포 특성을 비교하였다. 연구결과에 의하면, 수직적 연료분포모형은 부위별로 결정계수 0.96-0.98( )의 범위였으며, 추정된 모수는 통계적인 유의성을 보였다(P <0.05). 지표층에서 수관층까지의 거리는 대조구가 3.7m, 솎아베기(20% 강도) 처리구 4.9m, 솎아베기(40% 강도) 처리구 5.7m로 나타났으며, 수관연료밀도는 대조구 0.22kg/m³, 솎아베기(20% 강도) 처리구 0.18kg/m³, 솎아베기(40% 강도) 처리구 0.16kg/m³로 나타났다.
Abstract
The objective of this study was to analyze the effects of thinning intensity on vertical distribution of crown fuel for wildfire in Pinus rigida stands. A total of 20 sample trees were harvested and used for development of a crown fuel vertical distribution model. The model developed in this study was used to analyze the crown fuel vertical distribution by thinning intensity. The results of this study showed that the coefficient of determination ( ) for the suggested vertical distribution model ranged from 0.961 to 0.981 and the estimated parameters were statistically significant (P <0.05). Canopy base height was 3.7m at the control site (non-thinning) while those of 20%-thinning and 40%-thinning intensity sites were 4.9m and 5.7m, respectively. The needles and twigs with less than 1cm diameter accounted for 0.22 kg/m³ of the canopy bulk density at the control site, but 0.18 kg/m³ in 20%-thinning intensity site and 0.16 kg/m³ in 40%-thinning intensity site.
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