임분 수확예측 모델을 이용한 간벌 시나리오별 목재수확량 예측

김영환 ( Hwan Kim Young ),김태욱 ( Tae Wook Kim ),원현규 ( Hyun Kyu Won ),이경학 ( Kyeong Hak Lee ),신만용 ( Man Yong Shin ) 한국산림과학회 2012 한국산림과학회지 Vol.101 No.4

Forest stand yield and its changes along with 10 thinning scenarios were estimated using a forest stand yield model for six major tree species in Korea such as Pinus densiflora in Gangwon province pinus densiflora in other regions pinus koraiensis Larix leptolepis quercus acutissima carruth quercus mongolica. The 10 thinning scenarios were generated based on a number of constraints and assumptions. For instance it was assumed that thinning is implemented between 15 years and 40 years with 5 year period and its duration should be at least 10 years. Also the overall removal rate from the thinning treatments was assumed to be not greater than 60%. Under the 10scenarios the overall stand yield volume from thinning and final harvesting were estimated for each species and site index. The results showed that highest yield volumes were obtained for Pinus densiflora in Gangwon province Pinus koraiensis and Quercus mongolica when 30% of basal areas were thinned at 20 and 40years while highest yield volumes were obtained for Pinus densiflora in other regions and Larix leptolepis when 20% of basal areas were thinned at 20 30 and 40 years. Those two scenarios gave the same amount of highest yield volume for quercus acutissima carruth. Also the results indicated that thinning treatment is effective to increase overall stand yield volume and its effects are larger with a higher site index. The largest thinning effects were found in pinus densiflora in Gangwon province (28%) and larix leptolepis (25%) while in pinus koraiensis (12%). The forest stand yield model used in this research could be an effective tool for estimating the stand dynamics with various thinning treatments but it could be improved in a further research that validates its applicability in the field.

우리나라 임가경제조사를 위한 입목자산가치 평가업무 프로세스 분석

김영환 ( Young Hwan Kim ),원현규 ( Hyun Gyu Won ),이호상 ( Ho Sang Lee ),정세졍 ( Se Kyung Chong ),신만용 ( Man Yong Shin ) 한국산림과학회 2008 한국산림과학회지 Vol.97 No.3

산림탄소상쇄 사업설계를 위한 주요 수종별 베이스라인 흡수량 산정 -산림경영형 사업을 대상으로

김영환 ( Young Hwan Kim ),전어진 ( Eo Jin Jeon ),신만용 ( Man Yong Shin ),정일빈 ( Il Bin Chung ),이상태 ( Sang Tae Lee ),서경원 ( Kyung Won Seo ),표정기 ( Jung Kee Pho ) 한국임학회 2014 산림과학 공동학술대회 논문집 Vol.2014 No.-

본 연구에서는 산림경영형 산림탄소상쇄 사업을 설계하는데 필요한 베이스라인 흡수량의 산정을 위해 제5차 국가산림자원조사 자료를 토대로 개발된 동적 임분생장모델을 적용하였다. 모델의 정확성 검증을 위해 홍천, 횡성, 양양 대치리 및 정자리에 위치한 4개 시험지 14개 간벌 처리구에서 조사된 실측자료와 비교한 결과 모델 예측치와 실측치의 편차가 5% 미만의 낮은 오차율을 보였다. 개발된 동적 임분생장모델을 이용하여 수종별 베이스라인 시나리오에 따른 임분 생장량 및 탄소흡수량의 변화를 예측하고, 베이스라인 탄소저장량을 산정한 결과, 상수리나무의 베이스라인 탄소저장량이 83.01tC/ha로 가장 높은 반면, 리기다소나무(32.17tC/ha)와 중부지방소나무(39.09tC/ha)는 저장량이 낮았다. 따라서 수종갱신을 통한 산림경영형 산림탄소상쇄사업을 추진하는 경우 리기다소나무와 중부지방소나무 임분을 대상지로 하는 것이 유리한 것으로 나타났다. 본 연구에서 제시된 수종별 베이스라인 탄소저장량과 동적 임분생장모델은 산림경영형 산림탄소상쇄 사업을 설계하는데 활용할 수 있을 것으로 기대된다. In this study, we developed a dynamic stand yield model to estimate the baseline carbon stock, which is essentially required for a forest carbon offset project based on forest management. For developing the yield model, the data was acquired from the databases of the 5th National Forest Inventory. The model was validated by comparing its estimations with field measurements that was conducted from 4 study sites (14 plots with thinning treatments) located in Hong-chun, Hoeng-sung, Yang-yang Daechi and Yang-yang Jungja. The difference between the estimations and the field measurements was less than 5%. Using the dynamic stand yield model, we estimated the changes in stand yield volume and carbon stocks for each species according to the baseline scenarios. As the results, we found that baseline carbon stock was the highest at Quercus acutissima stand (83.01tC/ha), while the lowest at Pinus rigida stand (32.17tC/ha) and Pinus densiflora stand of central region (39.09tC/ha). Hence, a project provider could get more carbon emission credits from a improved forest management project when considering the project with Pinus rigida stand or Pinus densiflora stand (central region). The baseline carbon stock and the dynamic stand yield model developed from this study would be useful for designing carbon offset projects based on improved forest management.

IV분과 : 산림경영형 산림탄소상쇄 사업설계를 위한 주요 수종별베이스라인 흡수량 산정

김영환 ( Young Hwan Kim ),전어진 ( Eo Jin Jeon ),신만용 ( Man Yong Shin ),정일빈 ( Il Bin Chung ),이상태 ( Sang Tae Lee ),서경원 ( Kyung Won Seo ),표정기 ( Jung Kee Pho ) 한국임학회 2014 한국산림과학회지 Vol.103 No.3

본 연구에서는 산림경영형 산림탄소상쇄 사업을 설계하는데 필요한 베이스라인 흡수량의 산정을 위해제5차 국가산림자원조사 자료를 토대로 개발된 동적 임분생장모델을 적용하였다. 모델의 정확성 검증을 위해 홍천, 횡성, 양양 대치리 및 정자리에 위치한 4개 시험지 14개 간벌 처리구에서 조사된 실측자료와 비교한 결과 모델 예측치와 실측치의 편차가 5% 미만의 낮은 오차율을 보였다. 개발된 동적 임분생장모델을 이용하여 수종별 베이스라인 시나리오에 따른 임분 생장량 및 탄소저장량의 변화를 예측하고, 베이스라인 흡수량을 산정한 결과, 상수리나무의 베이스라인 흡수량이 83.01tC/ha로 가장 높은 반면, 리기다소나무(32.17tC/ha)와 중부지방소나무(39.09tC/ha)는 흡수량이 낮았다. 따라서 수종갱신을 통한 산림경영형 산림탄소상쇄사업을 추진하는 경우 리기다소나무와 중부지방소나무 임분을 대상지로 하는 것이 유리한 것으로 나타났다. 본 연구에서 제시된수종별 베이스라인 흡수량과 동적 임분생장모델은 산림경영형 산림탄소상쇄 사업을 설계하는데 활용할 수 있을 것으로 기대된다. In this study, we developed a dynamic stand yield model to estimate the baseline carbon stock, whichis essentially required for a forest carbon offset project based on forest management. For developing the yieldmodel, the data was acquired from the databases of the 5th National Forest Inventory. The model was validatedby comparing its estimations with field measurements that were conducted from 4 study sites (14 plots withthinning treatments) located in Hong-chun, Hoeng-sung, Yang-yang Daechi and Yang-yang Jungja. Thedifference between the estimations and the field measurements was less than 5%. Using the dynamic stand yieldmodel, we estimated the changes in stand yield volume and carbon stocks for each species according to thebaseline scenarios. As the results, we found that baseline carbon stock was the highest at Quercus acutissimastand (83.01tC/ha), while the lowest at Pinus rigida stand (32.17tC/ha) and Pinus densiflora stand of centralregion (39.09tC/ha). Hence, a project provider could get more carbon emission credits from an improved forestmanagement project when considering the project with Pinus rigida stand or Pinus densiflora stand (centralregion). The baseline carbon stock and the dynamic stand yield model developed from this study would beuseful for designing carbon offset projects based on improved forest management.

국립공원의 용도지구 설정을 위한 지표인자의 구명

김영환,유기준,신만용 ( Young Hwan Kim,Ki Joon Yoo,Man Yong Shin ) 한국산림과학회 1998 한국산림과학회지 Vol.87 No.3

The objective of this study was to present the proper criteria which could be efficiently used for dividing the land-use zones in Korean national parks. Delphi technique was employed to collect data for this study. The Delphi process was designed with 3 round questionaries for Korean panel experts. A list of 30 criteria was obtained to be considered in dividing land-use zones. From the results, the biological category, in which 10 criteria were involved, occupied the most part of them. This means that the panels consider the biological criteria to be the most important ones under the serious situation of environmental deterioration. Using the 30 criteria emerged from this study, it could be possible to analyze the fitness of the existing land-use zoning system. Prior to the application of these criteria to each park, however, the areal characteristics should be surveyed to select the proper criteria. The new zoning system based on the regional characteristics of each park could be efficiently utilized for management of Korean national parks.

산림탄소축적을 고려한 국유림 장기경영계획 수립을 위한 CBM-CFS3 모델의 적용

장광민 ( Kwang Min Jang ),원현규 ( Hyun Kyu Won ),김영환 ( Young Hwan Kim ),탁광일 ( Kwang Il Tak ),신만용 ( Man Yong Shin ),이경학 ( Kyeong Hak Lee ) 한국산림과학회 2011 한국산림과학회지 Vol.100 No.4

Forest carbon stock changes in a national forest were assessed by CBM-CFS3 model with different management scenarios to support decision making for a long term forest planning. Management scenarios were composed with 4 different levels of timber harvesting - current harvesting level (scenario1), 30% increment in each period (scenario2), 3 times increment (scenario3), and 5 times increment (scenario4). For each scenarios, changes in total carbon stocks, carbon stocks of each carbon pools, carbon stocks of harvested wood products (HWP) and age class structure were estimated over 100-year planning horizon. The estimated total carbon stock including HWP at the end of final period (100 years) was 433.1 tC/ha under scenario 1, but the age class structure has skewed right to the upper classes, which is not desirable for sustainable forest management. Under the scenario 4, however, the total carbon stock decrease to 385.5 tC/ha and the area of old growth forest show a significant decline. The estimated total carbon stock under scenario 2 and 3 were 411.7 tC/ha and 410.5 tC/ha respectively, and it was able to maintain the initial level of the forest carbon stocks during the planning horizon. Also the age class structures under the scenario 2 and 3 were evenly distributed from class 1 to class 8. Overall, scenario 2 and 3 were the most acceptable forest management options, in terms of carbon stock changes and age class structure.