Optimization And Adjustment Of Industrial Structure Of Cities Along The Yellow River In Henan Province Based On Water Resource Constraint

Water resource is a kind of vital natural resource,which is the foundation of the development of various industries of national economy.There is a serious shortage of water resources in the Yellow River basin,which restricts the sustainable development of economy and society.As the main carrier of social and economic development,under the current constraints of water resources,how to optimize the industrial structure and realize the rational and efficient use of water resources is an important practical problem that needs to be solved to achieve high-quality economic development.The Yellow River basin in Henan Province is an important core area of grain production,the main center of social and economic activities and the industrial and energy base,but the water resources are in serious shortage.This paper takes the region along the Yellow River in Henan Province as an example,converts the 2017 input-output table of Henan province into a non-competitive input-output table,calculates the trade coefficient and input coefficient by using the location quotient model and gravity model,and builds the 2017 input-output model among cities along the Yellow River in Henan Province.Based on the established input-output model,the water use coordination degree of Henan Province was calculated,and the water use characteristics and industrial correlation degree of eight industries including agriculture,mining and manufacturing in Huangcheng city were determined to determine the direction of industrial transformation.Finally,a multi-objective linear programming model was constructed.With the maximum economic aggregate and minimum water consumption as the main objectives,water-saving and balanced scenarios were set with the minimum objective function of water consumption in the Yellow River region without edge.The year 2030 and 2035 were anchored to solve the adjustment degree of output value of 8cities and 8 industries in the Yellow River region.Then the optimization structure is evaluated and analyzed by the method of orientation and quantitative combination,and feasible optimization countermeasures of industrial structure are put forward.The main conclusions are as follows:(1)From 2015 to 2019,the industrial structure of Cities along the Yellow River in Henan Province,except Kaifeng,gradually shifted to industries with high water consumption and low water efficiency.In terms of the degree of extensive water use structure,there is a large difference in the water use structure of the cities along the Yellow River,among which xinxiang,Jiaozuo,Puyang and Kaifeng are also inclined to the industries with low water efficiency.Coordination degree,in addition to the other city kaifeng coordination are declining,and the decline of puyang city speed very quickly,visible in henan province along the yellow after development of urban industrial structure and water structure,lower water consumption of industry development is slow,not significantly enhance drives the output,so water along the yellow city industrial structure and structure need further adjustment.(2)From the perspective of water efficiency and industrial correlation of urban subdivision industries,other service industries in Kaifeng,Xinxiang,Jiaozuo,Puyang and Sanmenxia,as well as manufacturing industries in Zhengzhou,Luoyang and Jiyuan can be preferentially encouraged to develop.In most cities along the Yellow River,transportation industry and construction industry have a strong driving effect on other industries,but encouraging development may lead to overcapacity,which needs macro control according to social demand.Other service industries in Zhengzhou,Luoyang,Sanmenxia and Jiyuan are low-water industries,which have little driving effect on the development of other industries,but other industries are dependent on them,so there is no need to restrain their development.In most cities along the Yellow River,zhengzhou,Kaifeng,Luoyang and Puyang are high water consumption industries,which restrict development to a certain scale.Therefore,the degree of constraint should be emphasized in multi-objective linear programming.(3)The results of multi-objective linear programming along the yellow region show that the total output value of both water-saving scenario and equilibrium scenario increases,but the total output value of water-saving scenario increases less than that of equilibrium scenario.In the water-saving scenario,the scale of agriculture,electricity,heat and water production and supply should be reduced by 6% and 8%respectively,while the scale of construction,transportation,manufacturing and other service industries should be expanded.In 2035,the proportion of manufacturing and other services will increase,while the proportion of other six industries will also decrease,by about 5 percent.In the equilibrium scenario,the proportion of manufacturing increased by about 0.5% in 2017,while the proportion of other industries declined,including wholesale and catering,which decreased by about 3%.In 2035,the share of agriculture and electricity,heat and water production and supply will be reduced by 9 percent and 11 percent respectively.City divisions from the points of analysis of balanced picture each type industry also has change to 2035,but in some cities in the water-saving situation to have no change in 2035,the variations in zhengzhou,luoyang is larger,so in the future under the guidance of water Ding Chan in henan province can be successively,the points of primary and secondary according to the scale of urban water saving.