Abstract
The agricultural water price depends on the agricultural water price affordability (AWPA) in each region. This study found that the logarithmic linear model had the best fitting effect through evaluating the grey situation decision model, which considered factors such as rainfall and output value per unit area. The contribution of each influencing factor was determined by the Lindeman–Merenda–Gold method. We established a new model to determine the water expenditure coefficient (WEC) by improving the way that the value of the WEC is assigned. Then, the AWPA in different regions was calculated. The results showed that the WEC was between 2.62% and 12.95%, and the AWPA price was between 0.058 and 0.52 yuan/m3 (0.0084 and 0.075 $/m3). The contribution of precipitation and output was 45.20% and 25.60%, respectively. The WEC and AWPA in northeast, northwest, and northern China are higher than those in southwest and southern China. The AWPA in the Yellow River Basin was higher than that in the Yangtze River Basin; however, the space for adjustment in the Yellow River Basin was slightly smaller than that in the Yangtze River Basin.
Highlights
As an important branch of modern decision-making theory and methods, was first proposed by Mr Deng and is a method for selecting a group of best situations in grey situations that correspond to grey events and grey countermeasures [18–20]
Based on the above results, the water expenditure coefficient (WEC) and agricultural water price affordability (AWPA) obtained in this study differ slightly from those obtained in previous studies
This does not mean that the rate of contribution of psychological factors to the WEC is lower than that of precipitation
Summary
The agricultural water price in China has been low for a long time, and its regional differences are large and the reform of agricultural water prices is lagging behind. One reason for this is that local governments are worried about the impact of price adjustment on people’s livelihood. Latinopoulos [1,2] indicated that the pricing for agricultural irrigation water in the eastern. United States is “service cost + user affordability”. In the reform of agricultural water prices, France chose the pricing model of “full cost + user affordability” for irrigation water pricing [3]. It is of great importance to promote the reform of agricultural water prices in China and define agricultural water price affordability in order to allay government concerns about price adjustments
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