| China’s water shortage and imbalance of supply and demand and other water contradictions are prominent,especially in the industry represented by agriculture,there are problems such as large water consumption and low water efficiency.With the deepening of water conservancy reform,the construction of the water rights market has gradually been refined and deepened,and a large number of water rights trading cases have been accumulated.In this context,it is of great significance to systematically evaluate the performance of the water rights market and clarify the influence mechanism of the performance of the water rights market.Taking the Shiyang River Basin as the research area and the water right market in typical irrigation areas as the research object,the performance and influence mechanism of it were studied.Firstly,the improved TF-IDF(Term Frequency&Inverse Document Frequency)algorithm is used to determine the index weight,and an evaluation method is constructed,and then the performance of the water right market in typical irrigation areas is evaluated.Based on the evaluation of the performance of the water rights market,the influencing factors of the performance of the water rights market are analyzed.After that,the income from planting when the two parties traded water rights were studied.Considering the irrational behavior of water users when trading water rights,the cost-benefit decomposition and calculation before and after water rights trading of water users is analyzed from the perspective of prospect theory,taking typical irrigation areas as an example.Finally,based on the analysis of the influencing factors of Chapter 3 on the performance of the water rights market,the framework for analyzing the influencing mechanism of the performance of the water rights market is sorted out.Based on the research on the planting income of water users before and after water right trading in Chapter 4,from the perspective of prospect theory,combined with the impact mechanism of cost-benefit theory and cooperative game theory on the performance of water right market and its action threshold,the following conclusions are drawn:(1)The overall operation effect of the water right market in irrigation area A and irrigation area B in the Shiyang River Basin was moderate.The evaluation showed that the water rights market was the most sustainable and least equitable.The sustainability score of the water rights market in irrigation area A was 0.18 before 2013,and the sustainability score after 2013 was0.12,with an overall score of 0.36;the sustainability score of the water rights market in irrigation area B was 0.24;and the fairness score of the water rights market in irrigation area A and irrigation area B was 0.1 and 0.09,respectively.Affected by the gratuitous trading policy,the operation effect of the water rights market in Irrigation Area A before 2013 was better than that after 2013.The difference in the operation effect of the water rights market in the two irrigation areas is affected by factors such as the amount of water allocated,crop type,water price,land scale,water right trading level,and water right monitoring method.(2)Water users obtain low-priced water through water right trading,reduce water costs and increase crop output:when the amount of water right reduction is 5%～30%,the subjective value V(d)of wheat farmers through water right trading can be increased by 1097.74yuan/ha～1886.78 yuan/ha,and the subjective value of corn farmers can be increased by 1195.51yuan/ha～1595.63 yuan/ha;Water users obtain low-cost water through water rights trading,indirectly reducing tiered water prices and reducing water costs.(3)The factors affecting the water rights market are used in cooperation with each other.When considering the single factor of water right allocation difference on the water rights market,when the difference in prospect value is too small(the difference in water right allocation between wheat farmers and corn farmers is less than 525m~3/ha and 922.5m~3/ha respectively),it is not enough to promote the occurrence of water right trading.Water rights trading can only be driven if the difference in water rights allocation meets the minimum yield value of the parties to the transaction.When considering the difference in water rights allocation and land scale,even if the difference in water right allocation is small,it is easier for water users with large land scale to promote the occurrence of water right trading land.(4)Influence mechanism of the performance of the water rights market:The performance of the water rights market is affected by the demand for water rights trading and the income from water rights trading.The difference in planting structure of water users and the difference in water right allocation generate water right trading demand,and the tiered water price and land scale affect the income of water right trading.The greater the difference,the greater the demand for water users to trade water rights,and the greater the transaction income obtained when trading water rights. |
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