earticle

영어

This study compared and analyzed the combustion characteristics of infected and non-infected trees through ignition time and combustion heat tests according to moisture content under the premise that stockpiled infected pine trees could act as a factor for forest fire spread. The samples used in the experiment were limited to the stems of uninfected and infected trees. The moisture content of non-infected trees was 26.27% and the average moisture content of infected trees was 20.03%, showing a difference of 6.24%. In addition, the average heat of combustion for each period of uninfected and infected trees was analyzed to be 5,017.33 kcal/kg and 4,762.00 kcal/kg, respectively. The average ignition time of uninfected trees was 16 seconds when the moisture content was 26.27%, and the average ignition time of infected trees was 9.80 seconds when the average moisture content was 20.03%. As the moisture content decreased, the ignition time was shortened, and the heat of combustion showed a tendency to decrease slightly. As a result of the analysis, it was confirmed that the infected trees in the stockpiling were a risk factor for the spread of stepping-stone-type vertical forest fires.

한국어

이 연구는 재선충 적치 감염목이 산불확산 요인으로 작용할 수 있음을 인식하고, 비감염목과 감염목의 수분함 량에 따라 착화시간과 연소열을 실험·분석하였다. 실험에 사용한 시료는 비감염목과 감염목의 수간부로 한정하였다. 비감염목 수분함량은 26.27%, 감염목 수분함량은 평균 20.03%로써 6.24% 차이를 보였다. 또한, 비감염목과 감염목의 기간별 평균 연소열은 각각 5,017.33 kcal/kg, 4,762.00 kcal/kg로 분석되었다. 비감염목의 수분함량이 26.27%에서 착화시간은 16초였으며 감염목의 평균 착화시간은 평균 수분함량 20.03%에서 9.80초 로 분석되었다. 수분함량 감소에 따라 착화시간은 짧아졌으며, 연소열은 미세하게 감소하는 경향을 보였다. 분석결과 적치 감염목이 징검다리형 수직적 산불화재의 확산 위험인자임을 확인할 수 있었다.