환경영향평가 (Journal of Environmental Impact Assessment)

한국환경영향평가학회 (Korean Society of Environmental Impact Assessment)
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산림의 CO2 흡수량 평가를 위한 통계 및 공간자료의 활용성 검토 - 안산시를 대상으로 -

A Study on the Availability of Spatial and Statistical Data for Assessing CO2 Absorption Rate in Forests - A Case Study on Ansan-si -

  • 김성훈 (국립생태원 생태연구본부 융합연구실) ;
  • 김일권 (국립생태원 생태연구본부 융합연구실) ;
  • 전배석 (국립생태원 생태연구본부 융합연구실) ;
  • 권혁수 (국립생태원 생태연구본부 융합연구실)
  • 투고 : 2017.08.29
  • 심사 : 2018.03.05
  • 발행 : 2018.04.30
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초록

본 연구는 안산시 산림을 대상으로 연간 $CO_2$ 흡수량 평가를 위한 통계 및 공간자료의 활용성을 검토하였다. 통계자료, 임상도(1:5,000), 산림수종 표준 탄소흡수량 자료들을 활용해 산림의 연간 $CO_2$ 흡수량을 산정하였다. 또한 세분류토지피복도를 이용한 연간 $CO_2$ 흡수량 분석 및 활용성을 검증하였다. 통계자료를 이용한 경우 2010년을 기준으로 연간 $CO_2$ 흡수량의 차이가 컸다. 이는 2010년부터 산림기본통계의 작성 방법이 고도화됨에 따라 임목축적이 급격히 증가한 결과이다. 향후 통계자료를 활용할 경우 최근의 산림기본통계를 이용한 보정이 필요하다. 임상도(1:5,000)와 산림기본통계(2015, 2010)의 시기 차이를 이용한 방법은 수종들의 생장량에 따른 $CO_2$ 흡수량이 반영되지 않았다. 산림수종 표준 탄소흡수량 자료와 임상도(1:5,000)를 이용한 결과 연간 42,369 ton을 흡수하였다. 세분류토지피복도와 산림수종 표준탄소흡수량 자료를 이용한 결과는 40,696 ton이었다. 임상도(1:5,000)를 이용하여 세분류토지피복도를 검증한 결과 p<0.01 수준에서 유의했고, 흡수량 차이는 1,673 ton이었다. 본 연구는 다양한 산림활동의 온실가스 감축 효과 평가에 있어 객관적 기준을 적용하는 일환으로서 의의를 지닌다. 나아가 탄소흡수원과 관련된 토지이용 및 관리 등의 의사결정 지원을 위한 기초자료로 활용이 가능할 것이다.

This research was conducted to examine the availability of spatial data for assessing absorption rates of $CO_2$ in the forest of Ansan-si and evaluate the validity of methods that analyze $CO_2$ absorption. To statistically assess the $CO_2$ absorption rates per year, the 1:5,000 Digital Forest-Map (Lim5000) and Standard Carbon Removal of Major Forest Species (SCRMF) methods were employed. Furthermore, Land Cover Map (LCM) was also used to verify $CO_2$ absorption rate availability per year. Great variations in $CO_2$ absorption rates occurred before and after the year 2010. This was due to improvement in precision and accuracy of the Forest Basic Statistics (FBS) in 2010, which resulted in rapid increase in growing stock. Thus, calibration of data prior to 2010 is necessary, based on recent FBS standards. Previous studies that employed Lim5000 and FBS (2015, 2010) did not take into account the $CO_2$ absorption rates of different tree species, and the combination of SCRMF and Lim5000 resulted in $CO_2$ absorption of 42,369 ton. In contrast to the combination of SCRMF and Lim5000, LCM and SCRMF resulted in $CO_2$ absorption of 40,696 ton. Homoscedasticity tests for Lim5000 and LCM resulted in p-value <0.01, with a difference in $CO_2$ absorption of 1,673 ton. Given that $CO_2$ absorption in forests is an important factor that reduces greenhouse gas emissions, the findings of this study should provide fundamental information for supporting a wide range of decision-making processes for land use and management.

키워드

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