Resources Science ›› 2018, Vol. 40 ›› Issue (1): 11-21.doi: 10.18402/resci.2018.01.02

• Orginal Article • Previous Articles     Next Articles

Suitability evaluation of urban construction land based on supply and demand in Yangzhou City

Lin MENG1(), Jie GUO1,2,3, Chi SUN1, Minghao OU1,2,3()   

  1. 1. College of Land Management, Nanjing Agricultural University, Nanjing 210095, China
    2. Center of Urban-rural Joint Development and Land Management Innovation, Nanjing 210095, China
    3. State and Local Joint Engineering Research Center of Rural Land Resources Utilization and Consolidation, Nanjing 210095, China
  • Received:2017-05-10 Revised:2017-11-14 Online:2018-01-20 Published:2018-01-20

Abstract:

We established an evaluation index system of urban construction land suitability based on the theory of supply and demand, and calculated the suitability of urban construction land using BP neural networks in order to construct theoretical and practical foundations for the scientific allocation of urban construction land. Based on the theory of supply and demand, the suitability evaluation index system of urban construction land can be constructed according to background conditions, technical level, location and transportation, intensive degree, population density, and economic development. BP neural networks reflect the suitability of urban construction land for each evaluation unit, which helps to improve the precision of urban construction land suitability evaluation results. The research area can be divided into four regions. The highly suitable region area can be used for large-scale urban construction land development. The basically suitable region can fully develop relying on the highly suitable region and expand urban construction land moderately. The barely suitable region requires basic farmland protection and ecological protection, and the green industry with natural ecological protection and economic development benefits should be selectively developed. The unsuitable region should be given more policy support to ensure food security and ecological security. By comparing the suitability evaluation results of urban construction land and the layout of planning new urban construction land of ‘Rall Plan for Land Utilization of Yangzhou (2006-2020 year)’, most of the planning new urban construction land is located in the highly suitable area and the basically suitable region. However, some planning new urban construction land is located in the barely suitable region and unsuitable region respectively, so some or all of these should be eliminated or adjusted to highly suitable and suitable areas.

Key words: urban construction land, suitability evaluation, theory of supply and demand, BP neural network, Yangzhou City