Journal of Geographical Sciences ›› 2019, Vol. 29 ›› Issue (4): 581-597.doi: 10.1007/s11442-019-1616-z

• Research Articles • Previous Articles     Next Articles

Extraction and analysis of abandoned farmland:A case study of Qingyun and Wudi counties in Shandong Province

Guofeng XIAO1,2,3(), Xiufang ZHU1,2,3,*(), Chenyao HOU2, Xingsheng XIA1   

  1. 1. Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China
    2. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
    3. Beijing Engineering Research Center for Global Land Remote Sensing Products, Institute of Remote Sensing Science and Engineering, Beijing Normal University, Beijing 100875, China
  • Received:2018-09-10 Accepted:2018-11-08 Online:2019-04-25 Published:2019-04-12
  • Contact: Xiufang ZHU E-mail:xiao_gf@mail.bnu.edu.cn;zhuxiufang@bnu.edu.cn
  • About author:

    Author: Xiao Guofeng, Master Candidate, specialized in land use change monitoring research. E-mail: xiao_gf@mail.bnu.edu.cn

  • Supported by:
    The National High Resolution Earth Observation System (The Civil Part) Technology Projects of China;State Key Laboratory of Earth Surface Processes and Resource Ecology, No.2017-FX-01(1)

Abstract:

Rapid urbanization and continuous loss of rural labor force has resulted in abandonment of large areas of farmland in some regions of China. Remote sensing technology can indirectly help detect abandoned farmland size and quantity, which is of great significance for farmland protection and food security. This study took Qingyun and Wudi counties in Shandong Province as a study area and used CART decision tree classification to compile land use maps of 1990-2017 based on Landsat and HJ-1A data. We developed rules to identify abandoned farmland, and explored its spatial distribution, duration, and reclamation. CART accuracy exceeded 85% from 1990-2017. The maximum abandoned farmland area was 5503.86 ha during 1992-2017, with the maximum rate being 5.37%. Farmland abandonment rate was the highest during 1996-1998, and abandonment trend decreased year by year after 2006. Maximum abandonment duration was 15 years (1992-2017), mostly within 4 years and only a few exceeded 10 years. From 1993-2017, the maximum reclaimed abandoned farmland was 2022.3 ha, and the minimum ~20 ha. The maximum reclamation rate was 67.44%m, with annual average rate being 31.83%. This study will help analyze farmland abandonment driving forces in the study area and also provide references to identify abandoned farmland in other areas.

Key words: CART, abandonment, reclamation, farmland, Shandong Province, Landsat data