Coupling Coordination Degree And Influencing Factors Of Water-Energy-Food System In China

Water resources,energy and grain are unevenly distributed in space in China.The production of energy and food needs a lot of water resources.China’s water resources are more in the south and less in the north,while the center of energy and food is in the north,which aggravates the uneven spatial distribution of water,energy and food.At the same time,with the growth of population,the consumption of resources leads to the problem of resource shortage in China.Under the background of uneven distribution of space and a shortage of resources,water resources,energy and food three subsystems,the combination of quantitative measurement of water-energy-food system coupling coordination degree,research the relationship between water resources,energy and food,to encourage the rational allocation of resources,reduce waste of resources,promoting the sustainable development of resources is very important.In this paper,coupling coordination degree model and spatial Dubin model are used to study the relationship among water,energy and grain and the influencing factors of coupling coordination degree among them.First of all,with reference to previous scholars study respectively to select indicators for water and food,energy,build the index system of water-energy-food system,this paper comprehensive analysis of China’s 30 provinces in 2003-2017 water resource subsystem,the development of the subsystems of energy and food,at the same time will be a single subsystem research into water-energy-food system research,The relationship among them was quantitatively analyzed by using 23 indicators.In order to minimize the experimental error,it is necessary to conduct max-minimum processing on the index data.At the same time,entropy method is used to calculate the weight of indicators in each subsystem to prepare for the next model calculation.Secondly,the coupling coordination degree formula is used to calculate the development index of the three subsystems,the comprehensive development level index of the water-energy-food system and the coupling coordination degree,so as to analyze the relationship among the three subsystems and the change trend of the coupling coordination degree of the water-energy-food system.Again,in order to further analysis of water and energy-food system coupling coordination degree change,respectively using moran doberman index and space model is studied,through moran index results can be concluded that water-energy-food coupling coordination degree of spatial correlation exists,on the basis of study on factors affecting doberman can choose space model.Finally,according to the calculation results of coupling coordination degree model and spatial Dubin model,suggestions are put forward to improve the relationship between agricultural water and soil resources from three perspectives: rational distribution of agricultural water and soil resources,control of water pollution caused by energy exploitation and promotion of balanced development of energy and grain.The research significance of this paper mainly lies in the quantitative study of the relationship between water,energy and grain,and the calculation of the important factors affecting the coupling relationship between water,energy and grain,according to the result of calculation,the paper analyses synthetically and puts forward the countermeasures to promote the coupling coordination degree of water-energy-food system.