globalchange  > 气候变化事实与影响
DOI: 10.1016/j.jag.2017.07.006
Scopus记录号: 2-s2.0-85032483759
论文题名:
Mapping and estimating land change between 2001 and 2013 in a heterogeneous landscape in West Africa: Loss of forestlands and capacity building opportunities
作者: Badjana H; M; , Olofsson P; , Woodcock C; E; , Helmschrot J; , Wala K; , Akpagana K
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2017
卷: 63
起始页码: 15
结束页码: 23
语种: 英语
英文关键词: BEEODA ; Capacity building ; Heterogeneous landscape ; Land change ; Landsat ; Open source ; REDD ; Stratified estimation ; West Africa
Scopus关键词: capacity building ; data assimilation ; developing world ; forest ; land management ; land use change ; Landsat ; natural resource ; savanna ; sustainable development ; West Africa
英文摘要: In West Africa, accurate classification of land cover and land change remains a big challenge due to the patchy and heterogeneous nature of the landscape. Limited data availability, human resources and technical capacities, further exacerbate the challenge. The result is a region that is among the more understudied areas in the world, which in turn has resulted in a lack of appropriate information required for sustainable natural resources management. The objective of this paper is to explore open source software and easy-to-implement approaches to mapping and estimation of land change that are transferrable to local institutions to increase capacity in the region, and to provide updated information on the regional land surface dynamics. To achieve these objectives, stable land cover and land change between 2001 and 2013 in the Kara River Basin in Togo and Benin were mapped by direct multitemporal classification of Landsat data by parameterization and evaluation of two machine-learning algorithms. Areas of land cover and change were estimated by application of an unbiased estimator to sample data following international guidelines. A prerequisite for all tools and methods was implementation in an open source environment, and adherence to international guidelines for reporting land surface activities. Findings include a recommendation of the Random Forests algorithm as implemented in Orfeo Toolbox, and a stratified estimation protocol − all executed in the QGIS graphical use interface. It was found that despite an estimated reforestation of 10,0727 ± 3480 ha (95% confidence interval), the combined rate of forest and savannah loss amounted to 56,271 ± 9405 ha (representing a 16% loss of the forestlands present in 2001), resulting in a rather sharp net loss of forestlands in the study area. These dynamics had not been estimated prior to this study, and the results will provide useful information for decision making pertaining to natural resources management, land management planning, and the implementation of the United Nations Collaborative Programme on Reducing Emissions from Deforestation and Forest Degradation in Developing Countries (UN-REDD). © 2017 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79997
Appears in Collections:气候变化事实与影响

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作者单位: Laboratory of Botany & Plant Ecology, Department of Botany, Faculty of Sciences, University of Lomé, P.O. Box 1515, Lomé, Togo; Department of Earth & Environment, Boston University, 685 Commonwealth Avenue, Boston, MA, United States; Southern African Science Service Centre for Climate Change and Adaptive Land Management, Regional Secretariat, P.O. Box 87292, Eros, Windoek, Namibia; Faculty of AgriSciences/SUWI, Stellenbosch University, Private Bag X1, MATIELAND, Stellenbosch, South Africa

Recommended Citation:
Badjana H,M,, Olofsson P,et al. Mapping and estimating land change between 2001 and 2013 in a heterogeneous landscape in West Africa: Loss of forestlands and capacity building opportunities[J]. International Journal of Applied Earth Observation and Geoinformation,2017-01-01,63
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