Study on the structure optimization of industrial sectors under environmental constraints

Industrial system is an indispensable driving force of social development,but the development of Chinese industry is facing increasingly severe environmental constraints.What's more,the structures of industrial within the system and their pollution levels are the main influential factors of industrial pollution.The paper selected the western province,Shaanxi,to conduct the empirical research.Based on the analysis of the current situation of industrial economic development in Shaanxi Province and its pollutant emissions trend,indicators of 8 pollutants emission intensity were selected,including industrial wastewater,chemical oxygen demand,industrial waste gas,etc,to evaluate its pollution emission intensity of the 34 from 2001 to 2006 through acomprehensive evaluation.Thus,different industries' comprehensive evaluation index of emission intensity can be worked out.Taking GDP contribution rate of industrial sectors and a comprehensive index of industrial pollution emission intensity as the basis,through K-means clustering algorithm,in light of economic development and environmental load factors,industrial were divided into four categories:sectors with high economic contribution and high environmental load,sectors with high economic contribution and low environmental load,sectors with low economic contribution and low environmental load and with low economic contribution and high environmental load.On this basis,four different structure optimization strategies were proposed to provide reference for industrial structure optimization: prioritized development,optimized development,guided development and restricted development.