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ORIGINAL RESEARCH
Analysis of Decoupling State between Water
Use Efficiency and Economic Development
under Rank-Sum Score Hierarchy
–Anhui Province as an Example
1
School of Economics and Management, Anhui University of Science and Technology, Huainan, 232001, China
Submission date: 2024-10-24
Final revision date: 2025-01-16
Acceptance date: 2025-03-17
Online publication date: 2025-04-22
Corresponding author
Shangyun Zhang
School of Economics and Management, Anhui University of Science and Technology, Huainan, 232001, China
School of Economics and Management, Anhui University of Science and Technology, Huainan, 232001, China
Shiyu Zhang
School of Economics and Management, Anhui University of Science and Technology, Huainan, 232001, China
School of Economics and Management, Anhui University of Science and Technology, Huainan, 232001, China
KEYWORDS
water use efficiencyeconomic developmentrank-sum ratio approachdecoupling modelstandard deviation ellipse
TOPICS
ABSTRACT
Examining the interdependent relationship between water use and economic development can yield
programs to foster sustainable economic growth in Anhui Province. The highly efficient SBM model
was employed to assess the water use efficiency of 16 cities in Anhui from 2012 to 2022. The inputoutput
of water resources was evaluated by the rank-sum grading method. The standard deviation ellipse
and center of gravity migration were employed to analyze the spatial and temporal evolution of water
use efficiency in Anhui cities. The Tapio decoupling model was employed to examine the relationship
between water use efficiency and the level of economic development. The findings indicate that: (1)
The water use efficiency in Anhui Province from 2012 to 2022 exhibits a "V"-shaped fluctuation with
a rising trajectory. The average value ranges from 0.673 to 0.907. (2) The spatial distribution of water
use in Anhui transitioned from "high in the north and south, low in the middle" in 2012 to "high in the
east and low in the west" in 2022. The spatial center of gravity is shifting eastward in a "W" formation.
(3) From 2012 to 2022, the decoupling of water use efficiency and economic development progressively
showed a positive trend with periodic fluctuations.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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