Research on Multi-Source and Multi-User Water Pricing Mechanism Based on Dynamic Game Model--A Case Study of Yiwu City.

Water pricing is a crucial lever for promoting the rational allocation of water resources, which is related to the healthy development of the economy and society. Scientifically and reasonably determining water prices is the core of achieving healthy and orderly development. Currently, the formulation of water prices in China is difficult to unify due to the complex approval mechanism, different formation times of costs, and the lack of a scientific cost-benefit relationship between multiple water sources and multiple users. To promote quality-based supply of water and utilization of recycled water, to achieve high-quality and low-cost water, to play the role of water price mechanisms in the complex configuration of multiple water sources, it is imperative to establish a scientific and reasonable water price equilibrium system for multiple water sources and multiple users. This article starts from the perspective of water price marketization, fully considers the supply and demand conditions of the multi-water source market, the role mechanism of supply and demand subjects and their geographical factors in the multi-water source pricing process. Taking Yiwu City as an example, this article constructs a Stackelberg game model between local governments, water supply enterprises, and water users respectively in the leading position, and compares and analyzes the equilibrium prices and benefits of the three subjects under different conditions. The results show that under the condition that water users dominate, the price of multi-water sources is the lowest, and under the condition that water supply enterprises dominate, the overall benefits are the highest, and the price system obtained is as follows: the price of water from water storage--resident users is 5.63 CNY/m³; the price of water from water storage--non-resident users is 6.20 CNY /m³; the price of water from water storage--special users is 6.21 CNY /m³; the price of river water --non-resident users is 3.34 CNY /m³; the price of recycled water--resident users is 2.95 CNY /m³, and the price of recycled water--non-resident users is 3.06 CNY/m³. This pricing system can achieve the balance of reasonable profits for water supply enterprises, reasonable payments for water users, and rational allocation of water resources, providing theoretical support for the marketization of water pricing and providing reference for further research in this field. [ABSTRACT FROM AUTHOR]