灌溉水利用率是指某一时期灌入田间可被作物利用的水量与水源地灌溉取水总量的比值（%），用η表示。
农业节水的根本任务之一在于提高灌溉水利用率和生产效率。
One of fundamental tasks of agricultural water conservation is to improve the efficiency and productivity of irrigation water.
根据区域水量平衡原理，从灌溉水的损失途径分析，提高灌溉水利用率有工程措施、管理措施和技术措施。
In accordance with regional water volume balance theory, there are structural, management and technical measures to improve efficiency of irrigation water by analyzing how irrigation water losses.
农业灌溉水有效利用率低下，灌溉水利用系数不足0.4，灌区节水有相当大的潜力。
The effective utilization rate of agricultural irrigation water is very low. Its utilization factor is below 0.4 that there are great potentialities on water saving in irrigated regions.
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