Urban expansion and its consumption of high-quality farmland in Beijing,China |
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| Institution: | 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A, Datun Road Chaoyang District, Beijing, 100101, People''s Republic of China;2. Department of Forestry and Natural Resources, Purdue University, West Lafayette, Indiana 47906, USA;3. University of Wisconsin-Madison, Wisconsin Energy Institute, 1552 University Avenue, Madison, WI 53726, USA;1. Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, 1219 Queen Street East, Sault Ste. Marie, ON P6A 2E5, Canada;2. USDA Forest Service, Southern Research Station, Eastern Forest Environmental Threat Assessment Center, 3041 Cornwallis Road, Research Triangle Park, NC 27709, USA;3. Agriculture and AgriFood Canada, 1 Airport Road, Swift Current, SK S9H 3X2, Canada;4. Agriculture and AgriFood Canada, Eastern Cereal and Oilseed Research Centre, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada;5. Agriculture and AgriFood Canada, Research and Analysis Directorate, Floor 4, Tower 7, 1341 Baseline Road, Ottawa, ON K1A 0C5, Canada;1. School of Geography and Tourism, Qufu Normal University, Rizhao City, Yantan Road, No.80, Shandong Province, China;2. The Key Laboratory of the Coastal Zone Exploitation and Protection, Ministry of Land and Resources, Nanjing City, Beijingxi Road, No.43-8, Jiangsu Province, China;3. College of Land Management, Nanjing Agricultural University, Nanjing City, Weigang, No.1, Jiangsu Province, China;1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2. Chongqing Jiaotong University, Chongqing 400074, China;3. Center for Chinese Agricultural Policy, Chinese Academy of Sciences, Beijing 100101, China;1. Norwegian University of Life Sciences, Department of Landscape Architecture and Spatial Planning, Postboks 5003, 1432 Ås, Norway;2. Statistics Norway, Department of Economics, Energy and the Environment, Postboks 1400 Rasta, 2225 Kongsvinger, Norway;1. Center for Chinese Agricultural Policy, Chinese Academy of Sciences, Beijing 100101, China;2. Freeman Spogli Institute for International Studies, Stanford University, Stanford, CT, USA;3. Southwestern University of Finance and Economics, 611074 Chengdu, China;4. Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;5. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | China faces the challenge of using limited farmland to feed more than 1.3 billion people. Accelerated urbanization has exacerbated this challenge by consuming a large quantity of high-quality farmland (HQF). It is therefore essential to assess the degree to which urban expansion has preferentially consumed HQF, and discern the mechanism behind this. We found urban areas in Beijing to expand at speeds of 48.97 km2/year, 21.89 km2/year, 62.30 km2/year and 20.32 km2/year during the periods 1986–1995, 1995–2000, 2000–2005 and 2005–2020, respectively. We developed an indicator of HQF consumption due to urban expansion, representing the ratio of HQF consumed to its proportion of overall farmland, and found its values were 2.21, 1.57, 1.99 and 1.10 for 1986–1995, 1995–2000, 2000–2005 and 2005–2020, respectively. Thus, although HQF has been overrepresented in the farmland consumed by Beijing's urbanization, this phenomenon has decreased over time. Centralized expansion has contributed greatly to consumption of HQF. Topography and distances to urban and water bodies determine the relative consumption of HQF in urbanization. |
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| Keywords: | Urban expansion High-quality farmland Land evaluation Land transformation model Beijing |
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