渠道衬砌防渗是节约用水、扩大效益、提高水资源利用率的重要措施。通过减少渠系渗漏,还能起到降低或防止抬高地下水位,防治沿渠土壤发生次生盐碱化的作用。这是我国尤其是北方干旱、半干旱灌溉农业区应该大力推广的水利技术措施之一。近年来,各地对不同类型的渠道衬砌方法和多种衬砌材料进行了大量试验研究,取得了不少较有成效的成果。 Canal liner seepage control is an important measure to save water, expand benefits and increase water utilization. By reducing canal leakage, it can also play a role of reducing or preventing raising groundwater level and preventing secondary salinization of soil along the canal. This is one of the water conservancy technical measures that should be vigorously promoted in our country, especially in the arid and semi-arid irrigated agricultural areas in the north of China. In recent years, various types of channel lining methods and various lining materials have been extensively studied and various achievements have been made.