Coupling And Simulation Control Of Eco-economic System In Ecologically Fragile Areas

Entering a new norm,the economic growth is facing enormous pressure in China.At the same time,the problem of eco-environment and resources is becoming increasingly prominent.Especially for alpine plateau in underdeveloped areas,the model of the economic sustainable development to create ecological civilization has becoming a research problem to be solved urgently in academic circles,while the study is how to protect the integrity of ecological system to get rid of the backward economy.Based on the important ecological barrier,the study takes Maqu as a case in this paper.Through the analysis and evaluation of eco-environment and eco-economic status,the paper uses the model of coupling coordination degree to reveal the coupled coordination degree of eco-environment and eco-economy,then structures the 3E-SD model to simulate eco-economic system.In order to explore the interaction of complex system in the optimization processing,the paper finally puts forward the effective ways to keep the sustainable development system.On the overall level,the study makes a comprehensive evaluation to Maqu from three aspects in eco-environment,economic and social development level.(1)Eco-environment.In this paper,based on the evaluation model of ecological vulnerability and ecological safety,the ecological system is effected by the climate change,economy and population pressure in Maqu where is belonging to the moderate fragile of ecological type.The distribution characteristics of fragile ecological space:the ecological vulnerability is serious in the area of South Eastern and Northern where is along the coast of the Yellow River,where fragile grade is higher;the ecological vulnerability is light in the area of South and Southwestern parts,where vulnerability level is low.Based on the ecological footprint method and the application of evaluation mode on ecological security,the study show that the state is ecological deficit in Maqu.Ecological security is characterized as relatively unsafe situation.(2)Economy.In low economic output,per capita GDP is lower than the national level;the adjustment of industrial structure is obvious and the development potential of tourism industry is great;the proportion of investment is small with the lack of growth momentum;fiscal expenditure structure is single with in increasing pressure on financial deficit.(3)Society.The population density is sparse and urbanization rate is low;the Engel coefficient is decreased and the consumption level of residents has improved;the style of cultural is unique with the profound of Tibetan Buddhism;social has the development progress,but is still relatively lagging behind;the potential transportation is tremendous,but the capacity of transport is feeble.Based on the comprehensive evaluation of the eco-economic and social development,with the construction of evaluation index system on eco-economic and social system,the paper has a comprehensive evaluation of eco-economic and social system in Maqu,and calculate coupling degree and coordination degree of the eco-economic and social system in the application of coupling coordination degree model.The results showed that the coupling coordination degree has the trend of inverse U-shaped curve in Maqu,and the process of change is from moderate imbalance,barely coordination,and primary coordination to mild disorder.Therefore,in different stages of development,social and economic system should be self-bearing capacity to adapt with ecological system,under certain capacity and resilience level of ecological system.If too slow or too fast,the complex systems will in enable imbalance,which restricts the development of comprehensive level in Maqu.This paper adopts 3E-SD model to simulate eco-economic and social system,and explore the interaction of complex systems.The study has the optimization control,which is aimed at the defects and shortcomings of the system.Finally the paper proposes the effective way of sustainable development system.First,the study puts forward the existing defects and problems through the simulation of system:(1)The level of slaughter rate is low,resulting in excessive grazing and in grass-animals imbalance.(2)It has mainly way of extensive grazing mode,while the intensive farming has not yet formed.(3)The total economic output is still small,and the economic growth mode is single,and the proportion of industrial structure is unbalanced.Secondly,through the optimization of control measures to the system,the study makes up the defects and deficiencies of the system.The control measures are:(1)Through the improvement of technology and the adjustment the structure of animal husbandry,the suggestion is to shorten the cycle of livestock grazing and to increase slaughter rate in order to reduce the carrying capacity.(2)Expand the size of the herd and reduce the number of grazing stock.The mode of operation of animal husbandry is type from the extensive expansion to the ecological intensive with the development of animal husbandry on specialization,industrialization and large-scale.(3)Improve up planting of forage and forage.(4)Develop the efficient ecological of animal husbandry and the tourism industry with the alpine snowy Tibetan style,and establish the network system of modern sales and logistics distribution.Finally through the optimization of control system,the effect of system efficiency is obvious:realize the transition from the traditional of animal husbandry to the high-modern of animal husbandry,promote the optimization and upgrading of industrial structure,and improve the economic efficiency and the living standards of residents;In order to sustainable development of eco-economic system,it is to increase the utilization of pasture and decrease overloading rate to reduce storage,which finally bring about the balance of grass storage in Maqu.