Research Of Virtual Water Consumption,dynamic Transfer And Driving Mechanism In Fujian Province From The Perspective Of Domestic Circulation

Water shortage has become a bottleneck restricting the sustainable development of society and economy.How to improve the current situation of water shortage is a major practical problem to be solved urgently.With economic globalization,water resources can be redistributed in the form of commodity trade on a global scale,that is,countries and regions with water shortages can alleviate their water pressure by importing water-intensive products(this phenomenon is called virtual water strategy).However,existing research shows that under the situation of water shortage,China’s domestic virtual water trade mostly flows from areas with relatively scarce water resources to areas with abundant water resources.The possible impact of water trade on water-rich regions.This not only fails to relieve the pressure on water resources in water-scarce areas,but aggravates the water pressure in water-scarce areas,which is not conducive to the sustainable development of China’s water resources.In view of this,this paper takes Fujian Province,which is a developed export-oriented economy and rich in water resources,as the research area,and deeply analyzes the characteristics of water consumption in different departments within the water-rich area and its connection with the departments outside the province,and clarifies the virtual water trade in China in the water-rich area.Its status and role in the post-epidemic era provide policy guidance for the sustainable development of China’s water resources in the post-epidemic era.The innovative results of this paper are as follows:(1)By coupling a top-down input-output model(consumption-based water footprint)with a bottom-up water footprint accounting model(production-based direct water footprint),physical and virtual water,intermediate and final water The water resources consumed by the products are unified,which solves the problem that physical water and virtual water cannot be separated in the bottom-up model,and quantifies the supply chain of water resources within the province(small circulation in the province)and the supply chain outside the province(large domestic circulation).)in the dynamic transfer.The research selects three types of water resources: green water,blue water and grey water,and discusses the characteristics,directions and functions of virtual water flow and virtual pollution flow in the small circulation in Fujian Province and the large circulation outside the province from the perspective of water quantity and water quality.The results show that in the large domestic circulation of virtual water,the inflow of virtual water is nearly 3 times the outflow of virtual water,which belongs to the net inflow area of??The inflow of virtual water(blue water + green water)from water-scarce areas(such as Heilongjiang Province,Xinjiang Uygur Autonomous Region,Shandong Province,Henan Province,etc.)accounts for more than 70%.At the same time,Fujian Province also outsourced more than 50% of water pollution to water-scarce areas,and it did not play a role in water compensation for water-scarce areas in the virtual water trade.The proportion of virtual grey water occupied by intermediate input products in the small circulation in the province exceeds 50%.The primary industry is the main outflow department of virtual water,the secondary industry is the main inflow department,and the tertiary industry has a small amount of virtual water flow and poor liquidity.The key paths of virtual water transfer are: agriculture/forestry/animal husbandry to the food and tobacco sector,agriculture/forestry/animal husbandry to the construction sector,of which the largest virtual water flow is animal husbandry to the food and tobacco sector,with an average transfer of 17% over the four years(4.5 billion cubic meters)of virtual green water,3%(340 million)of virtual blue water and 14%(8.15 billion cubic meters)of virtual gray water.(2)A highly segmented study of industrial sector water footprints and virtual water to identify hotspot sectors for water use and pollution emissions.This paper uses the improved Biproportional Scaling Method(because its iterative process can be simplified to three letters of RAS,abbreviated as RAS)to split the primary industry into agriculture,forestry,animal husbandry,fishery,and services related to agriculture,forestry,animal husbandry and fishery Industry and other 5 departments to discusses their roles and functions in the industrial chain within the province and outside the province.Taking the log economic forest as the object to simulate the green water footprint of the forestry sector,and taking the economic forests such as fruit trees and tea trees as the research object to simulate the grey water footprint of the forestry sector,thus laying a data foundation for the virtual water and water footprint research of the forestry sector.At the same time,this paper also conducts refined research on other industrial sectors,providing data basis and technical reference for high-resolution research on the three industrial sectors.The results show that the forestry sector is the sector that consumes the largest amount of water(direct green water + direct blue water),with an average consumption of12.98 billion cubic meters during the study period,accounting for more than 70% of the direct water footprint.The agriculture and animal husbandry sectors are the largest pollutant dischargers in Fujian Province.These two departments are the main direct responsible departments for water pollution in Fujian Province.The food and tobacco sector and the construction sector are indirectly responsible for local water pollution.(3)Using the Structural Decomposition Analysis Model(SDA),not only the driving force of the temporal change of the water footprint in the small circulation in Fujian Province and the driving force of the spatial change of the virtual water in the domestic and foreign large circulation in Fujian Province were respectively carried out.Analysis,and on this basis,the internal and external driving of virtual water inflow and outflow are sorted out.The results show that the internal demand drive is the main reason for the flow of virtual water from water-scarce provinces to Fujian Province.Technological progress and industry restructuring remain the main drivers for reducing Fujian’s water footprint and virtual water transfer.(4)Based on the above research,the author found that the linkage of the primary industry sector in the small circulation in the province is not strong,the secondary industry lacks stamina,the radiation driving effect is weak,and the smoothness of the internal circulation is poor;Playing the role of water resource outsourcing,most of the water volume and pollution are outsourced to water-scarce areas,which is very unfavorable for the implementation of China’s virtual water strategy.To this end,the author proposes a strategy of reforming the water and sewage system,adjusting the industrial structure,cultivating advantageous industries and industrial chains,building a complete domestic demand system,and promoting the linkage development of "big and small cycles" with a strong domestic virtual water cycle.The research in this paper has strong practical applicability,which makes up for the research gap of taking provincial units as the research object and studying the small circulation in the province and the large circulation outside the province from the perspective of the domestic circulation.Clarifying the inter-departmental virtual water transfer flow within the province is conducive to water-saving actions from the perspective of the industrial chain,and makes up for the deficiencies in physical water management caused by the inability to quantify the water resources consumed by intermediate products and services and the pollution they emit.Through the virtual water trade between Fujian Province and other provinces,understanding the status and role of Fujian Province in China’s virtual water trade will help to further understand that expanding domestic demand is a necessary condition for the formation of a unified domestic virtual water market.