Resources Science ›› 2017, Vol. 39 ›› Issue (5): 846-859.doi: 10.18402/resci.2017.05.05

• Orginal Article • Previous Articles     Next Articles

Regional land resource security evaluation based on system dynamics in Nanjing City

Hui CHEN1(), Guanghui FU2, Youzhao LIU1(), Pengyu TAI2   

  1. 1. College of Public Administration,Nanjing Agricultural University,Nanjing 210095,China
    2. School of Economic & Management,Nanjing Tech University,Nanjing 211816,China
  • Received:2016-06-02 Revised:2017-03-19 Online:2017-05-20 Published:2017-05-20

Abstract:

Land resource security is an important part of national and regional security. Taking Nanjing as our research focus,a regional land resource security evaluation model structure was designed in accordance with Pressure-State-Response(PSR). Based on system dynamics,land resource security points for three subsystems (food security,land economic security,land ecological security)and the relationship between regional social economy and the ecological environment were analyzed and simulated. The model can fully reveal the land resource system stability and security and continuity. Through the establishment of regional land resource security evaluation of the system flow chart,SD dynamic simulation analysis and evaluation were conducted. Fifteen kinds of schemes were designed,and the optimal scheme of land resource security strategy development was obtained through SD simulation. Vensim PLE was used for adaption and consistency checking for the established model. Option 3,6,2 and 9 were selected as the optimization mode in Nanjing,and Option 3 is optimal. The SD simulation model constructed here is a set of social,economic,environmental,external systems and internal structures as an integrated subsystem of dynamic analysis modeling,and the model is able to clearly express the entire network of land resource security system. This model will help regional land resource security evaluation,and in particular comparative study using a time dimension.

Key words: system dynamics, land resources security evaluation, index system, system flow diagram, Nanjing City