Evaluation and obstacle degree of ecological environment carrying capacity in Hunan Province——Based on DPSIR-TOPSIS model
Based on the DPSIR conceptual model,this study constructed the evaluation index system of ecological environment carrying capacity in Hunan Province.TOPSIS analysis method and obstacle degree model were used to comprehensively evaluate the ecological environment carrying capacity and obstacle degree in Hunan Province from 2011 to 2020.The results show that:From 2011 to 2015,the ecological environment carrying capacity of Hunan Province was in a slow rising period,the comprehensive system proximity increased by 0.068,and the subsystem proximity increased by 0.059 on average.In the period of rapid growth from 2015 to 2020,the comprehensive system proximity increased by 0.315,and the subsystem proximity increased by 0.383 on average.However,by 2020,the comprehensive proximity has not yet reached the"excellent"level and needs to be further improved.From the perspective of obstacle degree analysis,in 2020,state and pressure are the main obstacle system,and per capita land resources,population density,water conservancy,environment and public facilities management industry account for the proportion of fixed asset investment,and natural population growth rate are the main obstacle indicators.In general,to improve the ecological environment carrying capacity of Hunan Province,we should start from the state and pressure subsystems,such as population density,natural population growth rate and other indicators,rationally formulate population development plans,regulate local population density,actively cope with population aging,increase the implementation of two-child three-child policy,and realize the coordinated development of population,resources and environment and sustainable development of population.
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