Research on urban ecosystem health of Nanjing city, China

This paper introduces urban ecosystem health theory into ecological city, starting from the connotation of ecosystem health in urban, combined with the actual situation of Nanjing, then established Nanjing urban ecosystem health evaluation index system. Based on the theory of dissipative structure and information entropy and combined entropy change and information entropy, apply the information entropy theory to analyze Nanjing urban ecosystem health. Research shows: Nanjing urban ecosystem health index has been on the rise as a whole from 1999 to 2012, which suggested that the Nanjing urban ecosystem health has improved year by year, but the urban ecosystem health index is low that suggests sick and unhealthy. From the point of the internal composition of urban ecosystem, Nanjing urban economic system, social system and natural environment of health index is low. The sustainable development ability of Nanjing urban ecological system is not strong and the urban ecosystem health level remains to be further improved. © 2015 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.