Abstract:

The coordinated development is not only the objective requirement of the national economic development, but also an indispensable part of the sustainable development. Since the reform and opening up, the local government of Jiangsu Province has gradually taken the sustainable development into consideration under the condition of the rapid economic development. At the same time, corresponding measures are also taken actively to control environmental pollution by the local government, which devotes to establish the resourcesaving and environmentfriendly society. However, Jiangsu Province is still suffering from imbalance and incoordination in the course of development of economy, society and environment. Therefore, analysis of coordinated development in Jiangsu Province is beneficial to the environmental problems positioning, find out the weak points and development potential of the environment, and promote the coordinated development among environment, population and economy. Based on the theory of environmental security, the author puts emphasis on the environmental coordination development, puts focus on establishing the index system of the coordinated development of environment, population and economy in Jiangsu Province.The index system is composed of the environmental safety subsystem and the environmental impact subsystem, including a total of 31 indexes. Through using the improved AHP (Analytic Hierarchy Process) method and variation coefficient method to weight the indexes，we can get the coordinate coefficient by membership functions in the fuzzy mathematics. The results show that, from 2001 to 2010, Jiangsu is in the general coordinated state with the going up trend，although there are fluctuations in coordination coefficient. Therefore the coordinated development is optimistic in Jiangsu Province. Through careful analysis, some corresponding suggestions are given as follows:(1) Focus on improving the coordination development mechanism of environment, population and economy. Considering coordinated development strategy is an important part of sustainable development,and it should be introduced into the development strategy of Jiangsu Province as soon as possible. Then the government should try to make its own coordinated development policy of environment, population and economy in accordance with Jiangsu local conditions. (2) Environmental security maintenance system is proposed to maintain the environmental security in Jiangsu Province. It mainly consists of monitoring system, evaluation system and earlywarning system. Especially the earlywarning system, it could help to forewarn immediately when the factors threatening the environmental security arise. In this circumstance, effective measures should be taken in time by the local government to guarantee the environmental security. (3)New population policy should be made exactly to keep the population within a reasonable range. In addition, it is also absolutely necessary to perfect the population transfer policy, through encouraging people to transfer to small and mediumsized cities to achieve the appropriate distribution of population and properly population flow. (4) The adjustment and upgrade of industrial structure should be accelerated. And the energysaving and a higher level of industrial structure should be developed