中文摘要：

灌区排水再利用研究及其应用不仅对保障未来我国粮食安全和水安全有积极作用,而且对提高农田水肥资源利用效率、保护水环境等都具有十分重要的意义。总结了国内外灌区排水再利用研究基础理论和关键技术,包括排水再利用基础理论研究、常见的排水再利用工程运行模式和减轻排水灌溉利用负面效应的管理措施。指出我国灌区排水再利用具有较大潜力,排水再利用的节水减污效果明显,目前关于排水中氮磷等营养成分的研究成果较多,对盐分及其他组分的研究相对较少,再利用的工程运行模式与灌溉管理措施是影响排水再利用效应的关键因素,排水水质和水量变化规律、最佳再利用模式和灌溉管理措施的选择、再利用的生态环境效应评价与风险分析等是今后排水再利用研究的重要内容。

英文摘要：

Researches on drainage water reuse and its application in the irrigation district have great significance. In addition to safeguarding future food supply, drainage water reuse also raises the application efficiency of irrigation water and fertilizer,and protects the water environment. Basic theory and key technology of drainage water reuse at home and abroad were summarized,including the related study results of basic theory,several engineering modes for drainage water reuse,and management measures to alleviate the negative effects resulting from irrigation with drainage water. Through a systematic analysis of the existing research results,it was pointed out that drainage water reuse had great potential in China,and it had great significance for water-saving and pollution abatement. The amount of research works about nitrogen and phosphorus in the drainage water was greater than those of salt and other components at present,and reuse engineering mode and irrigation management measures were the key factors affecting recycling effect. In the end,a study was put forward on the changing laws of drainage water quality and quantity, selection of optimal reuse mode, the best comprehensive management measures,evaluation for environment effect and research on risk analysis. These will be major themes of researches on drainage water reuse in the irrigation district in the future.