Journal of Climate Change Research (한국기후변화학회지)
- Volume 8 Issue 4
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- Pages.329-337
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- 2017
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- 2093-5919(pISSN)
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- 2586-2782(eISSN)
DOI QR Code
Comparison of Land-use Change Assessment Methods for Greenhouse Gas Inventory in Land Sector
토지부문 온실가스 통계 산정을 위한 토지이용변화 평가방법 비교
- Park, Jin-Woo (Div. of Forest Industry Research, National Institute of Forest Science) ;
- Na, Hyun-Sup (Div. of Forest Resources Information, Korea Forestry Promotion Institute) ;
- Yim, Jong-Su (Div. of Forest Industry Research, National Institute of Forest Science)
- Received : 2017.10.19
- Accepted : 2017.11.20
- Published : 2017.12.31
Abstract
In this study, land-use changes from 1990 to 2010 in Jeju Island by different approaches were produced and compared to suggest a more efficient approach. In a sample-based method, land-use changes were analyzed with different sampling intensities of 2 km and 4 km grids, which were distributed by the fifth National Forest Inventory (NFI5), and their uncertainty was assessed. When comparing the uncertainty for different sampling intensities, the one with the grid of 2 km provided more precise information; ranged from 6.6 to 31.3% of the relative standard error for remaining land-use categories for 20 years. On the other hand, land-cover maps by a wall-to-wall approach were produced by using time-series Landsat imageries. Forest land increased from 34,194 ha to 44,154 ha for 20 years, where about 69% of total forest land were remained as forest land and 19% and 8% within forest lands were converted to grassland and cropland, respectively. In the case of grassland, only about 40% of which were remained as grassland and most of the area were converted to forest land and cropland. When comparing land-cover area by land-use categories with land-use statistics, forest areas were underestimated while areas of cropland and grassland were overestimated. In order to analyze land use change, it is necessary to establish a clear and consistent definition on the six land use classification.