依据农田内土壤含水率的差异性，有针对性地进行变量灌溉，既可节约用水又可提高经济效益。
According to the differences of soil water potential in the farmland, variable irrigation can save water as well as raise economic benefit.
研究结果显示，在优先考虑基本用水保障率较高的灌溉方式的前提下，农户会选择一种灌溉费用最小的灌溉方式；
The research results show that at a premise of prior consideration for irrigation mode of higher guarantee rate of basic water usage, farmer will choose an irrigation mode of minimum irrigation fee.
在对灌区来水和需水随机性分析的基础上，建立了一种确定灌区灌溉用水保证率的计算模型。
A calculation model is established in the paper for determining the water use ensurance probability based on the statistic analysis of irrigation area inflow and water needed.
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