• Journal of Forest and Environmental Science
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• 제32권2호
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• pp.140-148
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• 2016

This study aims to estimate the forest volumes of the economic forest in Gangwon Province of Republic of Korea (hereinafter referred to as Gangwon) through the synthetic estimation. To estimate the forest volume, Stratified systematic sampling method was used along with the forest type maps and the $5^{th}$ National Forest Inventory data. The synthetic estimation includes sample plots of the expanded areas as well as those of the target area, and the forest volume of economic forest in every city and county throughout Gangwon. Results show that the average forest volume calculated by synthetic estimation was $159.6m^3/ha$ in national economic forest and $129.6m^3/ha$ in private economic forest. The total forest volume of the national economic forest was approximately $59.45million\;m^3$, which was $20.18million\;m^3$ higher than that of the private economic forest. On the other hands, the standard error of the national economic forest was approximately ${\pm}2.21m^3/ha$, which was ${\pm}0.30m^3/ha$ lower than that of the private economic forest. The lowest standard errors was about ${\pm}3.12 m^3/ha$ in broad-leaved forest, followed by ${\pm}4.33m^3/ha$ of mixed forest, and ${\pm}5.78m^3/ha$ of coniferous forest.

• Journal of Forest and Environmental Science
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• 제24권3호
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• pp.165-169
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• 2008

This study attempts to analyze the relationship between forest volume and age based on 5th NFI data and spectral characteristics of satellite imagery using ASTER sensor in Korea. Forest stand volume and age had the negative correlation with the spectral reflectance in all of the band (Blue, Green, Red, SWIR). With increasing of stand volume and age, spectral reflectance decrease. The spectral reflectance of band1 showed the highest correlation between stand volume and spectral reflectance among the VNIR wavelength. The spectral reflectance band 1, 2 (visible wavelength) and stand age have high correlation compared to other bands. The correlation coefficients between forest volume and vegetation indices have low relationship. This result indicates that the reflectance of blue band may be important factor to improve the potential of optical remote sensing data to estimate forest volume and age.

• 펄프종이기술
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• 제44권5호
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• pp.63-71
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• 2012

This study was carried out to investigate pulping properties of the forest biomass arising from the national forest management operation. The forest biomass was collected and classified into many groups according to their species and age. After the chips were made from the forest biomass, the measurement of chip size and chemical analysis were performed. To make the pulps from the forest biomass, the kraft pulping was applied and thereafter the physical and optical properties of kraft pulps were measured. The pulp fibers from the forest biomass had the similar mean fiber length, but their properties became different according to wood species and ages. Differently from the other species, kraft pulps from chestnut wood had the highest kappa number. Acacia, paulownia and chestnut woods made kraft pulps with lower tensile strength and brightness than the others. It could be concluded that acacia, paulownia and chestnut woods must be screened out in order to make a good quality of kraft pulps while being collected during Forest Management Operation.

• 한국산림과학회지
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• 제101권2호
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• pp.286-290
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• 2012

산불은 전 세계적으로 다량의 온실가스를 배출하여 지구온난화에 기여한다. 본 연구에서는 산불로 인한 지표층 연료의 연소량과 이로 인한 온실가스 배출량을 분석하고자 하였다. 이를 위해 51개 산불을 대상으로 소나무림과 활엽수림으로 구분하고, 다시 지표화와 수관화 피해 지역으로 나누어 잔존 연료량을 채취하여, 미연소 지역의 연료량과 일원분산분석을 수행하였다. 그 결과 활엽수 지표화 지역은 8,361 kg/ha, 소나무 지표화 지역은 8,055 kg/ha, 소나무 수관화 지역은 12,333 kg/ha이 연소되어, 수종별 산불행태별로 차이가 있었다. 이때의 연소율은 각각 78, 59, 90%이었다. 이산화탄소, 메탄, 아산화질소 등의 온실가스 배출량은 활엽수 지표화 연소지역 15,856 kg/ha, 소나무 지표화 연소지역 14,834 kg/ha, 소나무 수관화 연소지역은 약 22,709 kg/ha이었다.

• 한국산림과학회지
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• 제104권3호
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• pp.443-453
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• 2015

1922년 임업시험장으로 조성된 홍릉숲은 한국 임업연구의 요람이면서 도시민에게 휴식의 장소를 제공하는 도시숲으로서의 역할도 수행하고 있다. 본 연구는 홍릉숲을 대상으로 이용객 모니터링을 통해 효율적인 홍릉숲 관리방안을 도출하였으며, 이를 위해 주말 홍릉숲을 방문한 750명을 대상으로 설문조사를 수행하였다. 설문조사 결과 이용객 연령대는 고르게 분포하고 있었으며 홍릉숲 인근지역에 거주하는 비율이 높았다. 또한 휴양목적으로 방문하는 비중이 높았으며, 홍릉숲을 시험림보다는 쉼터로 인식하는 경향이 나타났다. 마지막으로 이용객들은 전반적으로 높은 만족도를 보였으며 향후 홍릉숲 보전을 위한 적극 홍보와 교육의 필요성을 제기하였다. 이와 같은 결과는 홍릉숲의 관리 향상을 위해 다음과 같은 시사점을 제공한다. 첫째, 홍릉숲이 시험림과 도시숲 기능을 동시에 수행하기 위해서는 숲 해설 프로그램의 확대와 홍보를 통해 홍릉숲의 가치와 중요성을 더욱 적극적으로 알려 이용객들의 인식을 제고하여야 한다. 둘째, 주말 이용객을 대상으로 모니터링 수행을 통해 수요를 추정하고, 이를 바탕으로 이용객 관리 프로그램을 적용해야 한다. 결론적으로 홍릉숲의 엄격한 자원보전과 만족스러운 휴양기회 제공이라는 사회적 수요를 조화롭게 달성할 수 있도록 이용객 관리시스템을 구축하고 이를 자원과 서비스 관리에 반영하는 것이 필요할 것이다.

• 한국제4기학회지
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• 제18권2호통권23호
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• pp.107-107
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• 2004

In this paper we have introduced some results of study on stand growth pattern and stand structure of larch forest which are located in selected forest sites of Khangai and Gobi-Altai mountain ranges of Mongolia. Our investigations showed that growth intensity and stand structure in western Mongolia are very specific from the other forest vegetation zones of Mongolia. Studies on the stand structure and growth trend indicate that tree types of stand structure and different types of growth of Larix sibrica are very common in Western Mongolia. These peculiarities of stand structure and growth of larch stands in Western Monolia could be used for inventory work and an improvement of the forest management in Western Mongolian region. The larch tree is the dominant tree species in Western Mogolia. Forest cover of the region is about 15%, which is two times higher than the country's average. In this region forest area is divided into 4 forest sub-regions: the Central Khangai, Western Khangai, North Eastern Khangai and South Easterun Khangai sub-regions including taiga, pseudo taiga, sub taiga, sub-alpine and forest steppe belts. Silviculture practices and forest research management request to study forest growth trends in local and general conditions, which means to indicate a change of taxonomic characteristics of stand from time to time including diameter, height, basal area, growth stock etc. The forest management practice mostly uses tables of forest growth and yield based on the results of long term research on forest growth. Forest yield tables and other relevant forest standards of Russia are used for the forest inventory and forest management. They are not able to determine forest structure and growth peculiatities of Mongolian forests. Studies on forest resource assessment in Mongolia indicate that after logging operations and forest fires the natural regeneration of desired species such as pine and larch often does not succeed. This situation forces to take a different approach of forest management and silviculture practice depending on the stand structure and growth rate of the forest stands. According to our investigation in last years, forest growth pattern of larch forest depends mostly on stand structure, stand age and growth condition including forest soil, climate and location in different slopes. Due to improve environmental function of forest ecosystem in the region, it is needed to conduct very comprehensive study of high mountain forest ecosystem in selected sub-regions.

• Journal of Forest and Environmental Science
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• 제33권1호
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• pp.74-77
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• 2017

The purpose of this study is to analyze the effect of thinning intensity on the growth of large diameter trees in Korean white pine (Pinus koraiensis S. et Z.) plantation. Eight thinning plots were analyzed by categorizing into heavy thinning, light thinning, no thinning (control) according to thinning intensity. As a result, average DBH increased more in heavy thinning plots than in light thinning or unthinned plots. The number of large trees (DBH>25 cm) were obviously shown the most in heavy thinning plots. It is considered that heavy thinning is needed for the production of the large diameter trees.

• Journal of Forest and Environmental Science
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• 제31권3호
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• pp.202-206
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• 2015

Site index curves were developed for Larix kaempferi and Pinus koraiensis in Gangwon and North Gyeongsang provinces in Korea. For the development of site index, Schumacher and Chapman-Richards model were applied using the data collected from 2012 to 2014. Base age was set to 40 years for Larix kaempferi and Pinus koraiensis in site index of this study. Coefficient of determination and root mean square error of site index models were provided by species, and the models were compared with the previous studies to check the suitability. Overall, site index models developed in this study fitted in the current data well. Thus, the site indexes are considered to be properly used in Gangwon and North Gyeongsang provinces.

• Journal of Forest and Environmental Science
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• 제11권1호
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• pp.1-21
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• 1995

본 논문은 1992년 리우환경회담 이후 변화하고 있는 세계산림자원 및 국제목재시장에 능동적으로 대처하기 위한 방안을 모색하고자 의도 하였다. 특히 우리나라의 산림자원은 III영급 이하가 90% 정도를 차지하는 어린 임분으로 아직 육성임업단계에 있으므로 해외목재자원의 확보는 필수적이며 시급한 과제이다. 따라서 안정적으로 해외목재자원을 확보하기 위한 몇가지 전략을 제시하였다.

• Journal of Forest and Environmental Science
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• 제31권4호
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• pp.255-260
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• 2015

Height growth models for Pinus thunbergii in Jeju Island were developed in this study using four widely used nonlinear growth models; Exponential, Modified Logistic, Chapman-Richards, and Weibull. All functions were found to be significant at the 1% level. Chapman-Richards model for height-DBH allometry and Weibull model for height-age allometry was chosen as the best model on the all validation. All the model curves showed the similar pattern. Additionally, there was no abnormal pattern when the previous studies were compared. Therefore, these models are highly expected to be used to estimate the tree height using DBH or age for Pinus thunbergii especially in Jeju Island.