渠道渗漏是当前灌溉工程中一个值得重视的问题。据测定渗漏损失的水量约占引水量的40～60%。目前除有些大中型灌区的干、支渠道采用了一些防渗设施外,大部分斗、农、毛渠均未采取防渗设施,而斗、农、毛渠的渗漏损失要占总渗漏的50%左右。因而防止灌渠渗漏是节约用水,充分发挥水资源的潜力,扩大灌溉面积的重要课题。近年来,我国塑料工业的发展,为渠道防渗节水提供了新的途径。主要优点①防渗效果好。塑料薄膜是一种不透水的柔性材料,只要接缝处理好,可以 Channel leakage is a key issue in current irrigation projects. It is estimated that the leakage of water loss accounts for about 40 to 60% of the water. At present, some anti-seepage facilities are used for dry and branch channels in most large and medium-sized irrigation districts, and most of the anti-seepage facilities are not used for fighting, farming and furrow drainage, while the leakage losses of fighting, farming and furrows account for 50% of the total leakage. %about. Therefore, preventing seepage of irrigation channels is an important issue of saving water, giving full play to the potential of water resources and expanding irrigated area. In recent years, the development of China’s plastics industry provides a new way for seepage control and water saving. The main advantages ① impermeable effect. Plastic film is a waterproof and flexible material, as long as the seams handle well, you can