Research on the ecological security in resource-based cities based on emergy-ecological footprint model:a case study of Jiaozuo city

Taking Jiaozuo city as an example，evolution process of ecological security in Jiaozuo city during 1985 to 2014 is analyzed by using the emergy-ecological footprint model，the evolution law and development trend of ecological security in resource-based cities are quantitatively presented.The research demonstrates the change trend of ecological security in Jiaozuo city during 1985～2014 showed a “U” shape，Ecological deficit appeared in 1997，the deficit increased year by year，reached the maximum in 2010，after the deficit became smaller，the overall situation of ecological security in Jiaozuo city showed signs of improvement；fossil energy source land is a key factor affecting the ecological civilization construction in Jiaozuo city；through the government，enterprises and society's common ability，the ecological environment problems of the resource-based city can be effectively improved.