Developing methodology of land use and land use change matrix in LULUCF sector considering forest sector inventory in Korea

Paris Agreement for the establishment of Post-2020 was adopted. Republic of Korea should develop a systematic and reliable national inventory to cope with this. However, LULUCF monitoring at the national level is insufficient, and GIS/RS based analysis is indispensable to analyse spatial information. In this study, land-use change matrix was produced using two methodologies (Sampling method and Wall-to-Wall method) from 2000 to 2010 in Seoul, Incheon and Gyeonggi-do. Two methodologies are compared to suggest a more efficient approach. Used data was Aerial photograph (1995-2005), Ortho-imagery (2011-2013) and Sample point (4km, 2km, 1km) in Sampling method, Land Cover Map (2000-2004, 2013) are used in Wall-to-Wall method. In Sampling method, sampling intensities (4km, 2km, and 1km) are analysed by uncertainty assessment. When estimated forest land area, the grid of 2km sample plot is more precise percent than 4km and 1km sample plot. Forest land decreased from 588,920 ha (50.1%) to 573,210 ha (48.8%), where about 44.56% of total forest land remained as forest land and 4.1% of forest land was converted to cropland, cropland etc. Comparing the 2km sample estimated area with national statistics, forest land and wetland are underestimated while cropland, grassland, settlement and other land area are overestimated. Wall-to-wall method also analysed by land use change matrix. The estimated area is compared by two matrixes and which method is more precise percent in six categories. Based on two results, we can calculate Greenhouse gas inventory and compare with National Greenhouse Gas Inventory report. Thus, this study will provide national practical tools that can be used to estimate greenhouse gas inventory to cope with Post-2o2o and basic data for the research for continuous monitoring of land use change and variation using the results of the analysis. And it is possible to calculate national land use change matrix statistics constantly thereby it can provide the result with the view of natural science approach.

Keywords: LULUCF (Land Use, Land Use Change and Forestry), Land-use change matrix, Sampling method, Wall-to-Wall method, National Greenhouse Gas Inventory

Acknowledgements: This study was carried out with the support of ´R&D Program for Forest Science Technology (Project No. 2017045A00-1720-BB01)' provided by Korea Forest Service (Korea Forestry Promotion Institute) and was carried out with the support of 'R&D Program for Forest Science Technology (Project No. FTIS-2017044B10- 1819-BB01)' provided by Korea Forest Service(Korea Forestry Promotion Institute).