Urban Expansion and Agricultural Land Loss in China: A Multiscale Perspective

Kaifang Shi, Yun Chen, Bailang Yu, Tingbao Xu, Linyi Li, Chang Huang, Rui Liu, Zuoqi Chen and Jianping Wu
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Kaifang Shi: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China
Yun Chen: CSIRO Land and Water, Canberra 2601, Australia
Bailang Yu: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China
Tingbao Xu: Fenner School of Environment and Society, The Australian National University, Linnaeus Way, Canberra 2601, Australia
Linyi Li: School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China
Chang Huang: College of Urban and Environmental Sciences, Northwest University, Xi’an 710127, China
Rui Liu: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China
Zuoqi Chen: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China
Jianping Wu: Key Laboratory of Geographic Information Science, Ministry of Education, East China Normal University, Shanghai 200241, China

Sustainability, 2016, vol. 8, issue 8, 1-16

Abstract: China’s rapid urbanization has contributed to a massive agricultural land loss that could threaten its food security. Timely and accurate mapping of urban expansion and urbanization-related agricultural land loss can provide viable measures to be taken for urban planning and agricultural land protection. In this study, urban expansion in China from 2001 to 2013 was mapped using the nighttime stable light (NSL), normalized difference vegetation index (NDVI), and water body data. Urbanization-related agricultural land loss during this time period was then evaluated at national, regional, and metropolitan scales by integrating multiple sources of geographic data. The results revealed that China’s total urban area increased from 31,076 km 2 in 2001 to 80,887 km 2 in 2013, with an average annual growth rate of 13.36%. This widespread urban expansion consumed 33,080 km 2 of agricultural land during this period. At a regional scale, the eastern region lost 18,542 km 2 or 1.2% of its total agricultural land area. At a metropolitan scale, the Shanghai–Nanjing–Hangzhou (SNH) and Pearl River Delta (PRD) areas underwent high levels of agricultural land loss with a decrease of 6.12% (4728 km 2 ) and 6.05% (2702 km 2 ) of their total agricultural land areas, respectively. Special attention should be paid to the PRD, with a decline of 13.30% (1843 km 2 ) of its cropland. Effective policies and strategies should be implemented to mitigate urbanization-related agricultural land loss in the context of China’s rapid urbanization.

Keywords: urban expansion; agricultural land loss; nighttime light data; China (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (28)

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