Dynamic analysis of ecological security in central Yunnan province, China from 1990 to 2017

Abstract

Ecological security is an important content of national and regional security research. The Central Yunnan Province (CYP) has important location factors and social and economic development status, so ecological security research in CYP is quite relevant. For the purpose of our research, we adopted the S-PRD (Ecological Insecurity-Pressure-Regulation-External Driving Force) conceptual model to establish an evaluation index system based on the four subsystems of water, land, atmosphere, and biology to evaluate the ecological security of central Yunnan from 1990 to 2017 and analyse the characteristics of dynamic evolution. We used the grey incidence matrix analysis method to conduct retrospective grey relational evaluation and retrospective grey sensitivity evaluation and analyse the influencing factors of ecological security. The study conclusions showed that the security of the water system has been fluctuating and rising, and has stabilized in the past five years. Both the land system and the biological system have shown an upward trend, but the degree of change was relatively small, and the atmospheric system was stable. The evaluation value of the ecological environment insecurity of the four cities is generally on the rise. The control measures have the greatest impact on ecological insecurity, the second important factor is an external driving force.