Presenter
Miss. yanjun wang, sichuan university
Co-author(s)
Prof. xiaorong huang, sichuan university
Prof. haitao zhang, China Institute of Water Resources and Hydropower Research
Miss. yuzi li, sichuan university
Mr. ziyu zhou, sichuan university
Sub-theme
1. Water-Human-Economy(Agriculture, Industry, City...)-Ecology Nexus under a Changing Environment
Topic
1-2. Vulnerability and adaptability of water-land-energy-food nexus
Body
With the increasingly prominent conflict between economic development and water supply and demand, how to balance the relationship between economic development and changes in water consumption becomes an inevitable requirement for achieving sustainable development. Based on the data of 31 provinces in China from 2003 to 2019, this paper adopts an approximate model to determine the shape of the EKC of water consumption in the China and eight economic regions; quantitatively analyzes the mechanism of EKC formation through the contribution values of water use efficiency, industrial structure, economy and population scale to the change of water consumption measured by LMDI; introduces the decoupling elasticity index to further analyze the economic effect with the largest cumulative effect and the water consumption. The results show that the shape of the EKC of water use in China and the rest of the economic zones is inverted U-shaped, except for the EKC of water use in the northern coastal areas, which is decreasing. The effects of water use efficiency and industrial structure on the change of water use are negative, indicating that the improvement of technology and the change of industrial structure play a suppressive role in water use, while the effects of economy and population are positive, indicating that economic development and population growth play a catalytic role in water use, and water use efficiency and economy are the causes of the change of water use. The effect of economic and population is positive, indicating that economic development and population growth promote water use, and water use efficiency and economy are the main drivers of water use change; China and the eight major economic regions have shown a decoupling between water use and economic growth, and the decoupling is stronger in the less populated and relatively economically backward regions, and weaker in the more populated and economically developed regions.