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Development of Aboveground Biomass Default Value for REDD+ MRV in Developing Countries : 개도국 REDD+ MRV를 위한 지상 바이오매스 디폴트 값 개발

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Authors
Hee Kyung Ryoo
Advisor
이동근
Major
농업생명과학대학 생태조경·지역시스템공학부(생태조경학)
Issue Date
2014-02
Publisher
서울대학교 대학원
Keywords
REDD+MRVAboveground biomassdefault valueEast Kalimantan
Description
학위논문 (석사)-- 서울대학교 대학원 : 생태조경·지역시스템공학부(생태조경학), 2014. 2. 이동근.
Abstract
Tropical forests contain 25% of the carbon in the terrestrial biosphere covering 15% of the worlds lands, however, roughly 13 million hectares of the tropical forests are converted into other land use each year and being responsible for about 20%of global carbon emissions. Since the traditional approach of tackling deforestation and forest degradation is considered to be ineffective as the phenomenon continue unabated, a new mechanism – REDD+ (Reducing Emission from Deforestation and forest Degradation, enhancing forest carbon stocks) – has been introduced that enables developing countries to be financially compensated for achieving emission reduction from the activities associated with decreasing deforestation and forest degradation.
In order to account the carbon emission reduction from the forests, developing countries need detailed data and information regarding their tropical forests, nonetheless, the forest inventory is yet to be established in most of developing countries. Consequently, many REDD+ project developers use default value that are provided by IPCC to account forest biomass and carbon putting up with high uncertainty and low credibility. Carbon accounted with low credible method is difficult to be acknowledged as valid credit in international carbon market and hard to be compensated with financial benefit. To alleviate such problem, this research aims to develop country-specific aboveground biomass default value of higher accuracy by reflecting country and regional forest data that are available in public.
As East Kalimantan a sample case, first, forest in East Kalimantan was classified based on their floristic zone by DEM and their forest cover by group of trees. Secondly, in accordance with the forest classification information and collected species-specific destructive sampling data of East Kalimantan forest, allometric equation for each forest classification was developed. Thirdly, representative DBH size and tree density for each classification type were found to derive aboveground biomass default value for each forest classification.
Results indicated that East Kalimantan forest is mostly dominated by lowland and hill dipterocarp species having an altitude below 800m. However, significant area of primary dipterocarp forest have been disturbed by both natural factors and human activities and transformed into secondary forest, which mostly is dominated by few pioneer species. Forest in East Kalimantan could classified into primary forest dominated with lowland and hill dipterocarp species and secondary forest dominated with pioneer species. Allometric relationship for mixed dipterocarp species was found to be y = 0.837(DBH2) - 16.472(DBH) + 276.28, whereas pioneer species was y = -0.023(DBH3) + 0.872(DBH2) - 5.212(DBH) + 10.970. With the mean value of DBH and tree density, the mean aboveground biomass default value in East Kalimantan was found to be 611.22 t/ha for primary forest with dipterocarp species, and 2.25 t/ha for secondary forest with pioneer species. Comparing the default value with the other models that are commonly used to estimate tropical forest biomass in the field, the default value seemed to underestimate forest biomass yet comparable to the other values.
For the fact that IPCC aboveground biomass default value for East Kalimantan is 320 t/ha, using IPCC default value could highly underestimate or overestimate forest biomass in East Kalimantan depending on the forest type.
In order to estimate forest biomass and carbon with higher accuracy in national level, following research should be extended to national scale and provided to the project developers suffering for forest data limitation, hence to offer them a chance to negotiate for financial compensation in international carbon market.
Language
English
URI
https://hdl.handle.net/10371/125533
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College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Landscape Architecture and Rural System Engineering (생태조경·지역시스템공학부)Theses (Master's Degree_생태조경·지역시스템공학부)
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