Study On Regional Sustainable Development Based On Energy Value-Ecological Footprint Model

Longnan is located in the upper reaches of the Yangtze River Valley.It is an important source of water conservation in the middle and lower reaches of Yangtze River.The ecosystem condition and change in this area have great influence on the middle and lower reaches of the Yangtze River Basin.As an important land resource,farmland is an important part of the ecosystem.It is the foundation for human survival.This paper conducts research on sustainable development based on Longnan as the study area,and dynamically analyzes the ecological footprint of Longnan from 2005to 2015 based on the emergy ecological footprint model.It provides two dimensions of ecological and sustainable use of farmland from 2005 to 2015 in both time and space.The study eventually reached the following conclusions:(1)The results showed that the ecological footprint per capita increased from1.827 hm~2 in 2005 to 3.111 hm~2 in 2015,during the period of fluctuation is obvious,it increased by 1.284 hm~2 during the 11 years,an average annual growth rate of 5.47%;Contribution to the cultivated land ecological footprint of forest land and water area are always the biggest,the contribution is the least,building land and fossil fuel land contribution value increasing gradually over the grassland;Per capita ecological carrying capacity of Longnan showed a slow downward trend,it decreased by 0.247hm~2 in 11 years,an average annual decline of 0.85%;The ecological system by the ecological surplus into the ecological deficit and ecological deficit Expand the trend after 2013.(2)Before 2013,The index of the sustainable development of Longnan is greater than 0.50,and it is less than 0.50 after 2014,which proves that the ecosystem of Longnan was in a state of sustainable development before 2013,and the ecosystem was transformed into an unsustainable development direction after 2014;The ecological footprint of 10,000 yuan GDP showed a downward trend overall from 2005.6.710 hm~2/million went down to 2.821 hm~2/million in 2015.Indicating that the resource utilization efficiency of Longnan has gradually increased during the study period;The ecological footprint diversity index has been on an upward trend before2007,which has declined since 2007,but overall The downward trend shows that the distribution of bio-productive areas is becoming more and more imbalanced and the ecosystem is unstable;The development capability index has gradually increased from 4.602 in 2005 to 7.533 in 2015,which proves that the sustainable development of the ecosystem in Longnan is relatively good.(3)The yield factors of farmland in Longnan were all less than 1 during the past11 years.The yield of farmland in Longnan was lower than the average level in the province,and the yield factor of farmland was gradually reduced.The yield per unit area of farmland is declining;The ecological carrying capacity of per capita arable land remains basically unchanged,the per capita arable land ecological footprint as a whole shows an increasing trend,and the annual deficit of arable land ecosystem continues to expand;The sustainable utilization index varies between 0.259-0.316 in11 years.The situation of sustainable development of farmland in Longnan is urgent.The per capita ecological footprint of farmland in different districts of longnan is different in space.It shows deficit of different degrees.The sustainable utilization of farmland in all regions is in the medium unsustainable state,and the unsustainable situation of farmland ecosystem in the eastern region is more serious.Through the research,it is more and more serious in the process of social and economic development of natural resources consumption of Longnan,and constantly overdraw reserve resources.The ecological system is becoming more and more unsustainable.According to situation of the sustainable development of the ecosystem in Longnan,this paper puts forward some countermeasures to control the ecological deficit and promote the harmonious development of ecology and economy in Longnan.Improve the quality of the population and control over spending;Optimize industrial structure and develop circular economy;Strengthen ecological construction and Raise public awareness;Protect the quantity of cultivated land and improve the quality of cultivated land.