A Stochastic Dominance Comparison of Water‐Conserving Irrigation Strategies
用随机占优方法比较地下水下降地区的节水灌溉策略，发现六种策略优于传统做法，可节水40%并提高预期净收益。
Abstract Stochastic dominance and stochastic dominance with respect to a function are used to compare water‐conserving irrigation strategies in an area of declining ground water supplies. A computerized grain sorghum plant growth model using daily weather observations provides the basis for stochastic dominance comparisons. Six irrigation strategies dominate contemporary intensive irrigation practices by first‐degree stochastic dominance and two additional strategies exhibit second‐degree stochastic dominance over contemporary practices. Dominant strategies involve irrigating based on a 45 percent soil water criterion and eliminating early season irrigations. Some dominant strategies reduce water use by as much as 40 percent while increasing expected net returns.