DOI: 10.1016/j.jag.2014.01.006
Scopus记录号: 2-s2.0-84904460685
论文题名: Using Landsat Thematic Mapper records to map land cover changeand the impacts of reforestation programmes in the borderlands of southeast Yunnan, China: 1990-2010
作者: Zhang J ; , Pham T ; -T ; -H ; , Kalacska M ; , Turner S
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 31, 期: 1 起始页码: 25
结束页码: 36
语种: 英语
英文关键词: Chinaa
; Land cover monitoring
; Landsat TM
; Reforestation
; Support vector machines
; Yunnan
Scopus关键词: accuracy assessment
; border region
; classification
; environmental impact
; forest management
; land cover
; Landsat thematic mapper
; mapping method
; monitoring
; policy analysis
; reforestation
; China
; Yunnan
英文摘要: At the beginning of the new millennium, after a severe drought and destructive floods along theYangtze River, the Chinese government implemented two large ecological rehabilitation and reforesta-tion projects: the Natural Forest Protection Programme and the Sloping Land Conversion Programme.Using Landsat data from a decade before, during and after the inception of these programmes, we ana-lyze their impacts along with other policies on land use, land cover change (LULCC) in southwest China.Our goal is to quantify the predominant land cover changes in four borderland counties, home to tensof thousands of ethnic minority individuals. We do this in three time stages (1990, 2000 and 2010). Weuse support vector machines as well as a transition matrix to monitor the land cover changes. The landcover classifications resulted in an overall accuracy and Kappa coefficient for forested area and crop-land of respectively 91% (2% confidence interval) and 0.87. Our results suggest that the total forestedarea observed increased 3% over this 20-year period, while cropland decreased slightly (0.1%). However,these changes varied over specific time periods: forested area decreased between 1990 and 2000 andthen increased between 2000 and 2010. In contrast, cropland increased and then decreased. These resultssuggest the important impacts of reforestation programmes that have accelerated a land cover transitionin this region. We also found large changes in LULC occurring around fast growing urban areas, withchanges in these peri-urban zones occurring faster to the east than west. This suggests that differencesin socioeconomic conditions and specific local and regional policies have influenced the rates of forest,cropland and urban net changes, disturbances and net transitions. While it appears that a combinationof economic growth and forest protection in this region over the past 20 years has been fairly successful,threats like drought, other extreme weather events and land degradation remain. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79799
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Forestry, Southwest Forestry University, 300 Bailongsi, Kunming, Yunnan 650224, China; Departement d'études urbaines et touristiques, Université du Québec à Montréal, Montréal, Canada; Department of Geography, McGill University, Montréal, Canada
Recommended Citation:
Zhang J,, Pham T,-T,et al. Using Landsat Thematic Mapper records to map land cover changeand the impacts of reforestation programmes in the borderlands of southeast Yunnan, China: 1990-2010[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,31(1)