Study on material dematerialization test of Liaoning Province based on MFA and DEA models
基于MFA与DEA分析的辽宁省物质减量化检验研究

Material flow analysis(MFA) can quantify the relationships of material movement to resource utilization and to environmental effect in economic system by tracing the processes of input,storage and output of some substance in economic-environmental system,and it also can offer scientific basis for optimal management of resource and environment.This paper chose Liaoning Province,a representative of old industrial bases,as the research object.Firstly,by analyzing the indicators of material flow analysis,the paper determined the trends of Direct Material Input(DMI),Domestic Processed Output(DPO) and Total Material Requirement(TMR) between 1990 and 2008.Secondly,the Data Envelopment Analysis method(DEA) was used to measure the main indicators' efficiencies of material flow account respectively and the urgent tasks to dematerialize in Liaoning Province were clarified.Finally,research of testing the developing process of dematerialization in Liaoning Province was made.Some conclusions can be drawn as follows.(1) There was a dematerializing trend during the economic development,but the damage of DMI to environment was distinct.(2) The general efficiencies of DMI and DPO showed an upgrading performance while their average efficiencies were still low,which meant the DMI was saturated and the environment was destroyed with economic development.(3) The rebound effect of dematerialization was increasing as DMI was expanding and environmental stress was intensified.Fluctuations of dematerialization effect influenced the DMI and DPO of the corresponding years.(4) In 1990-2008,Liaoning Province reduced 22.88 million tons of DMI,and 5.82 million tons of DPO.Potential input dematerialization index was higher than potential waste dematerialization index,reflecting the rise of DMI would increase wastewater discharge.The dematerialization gaps of material input and waste were both greater than 0,which implied the potential of input dematerialization and waste dematerialization had been fulfilled to some degree,but more efforts should be done.