减少渠道渗漏,提高渠系利用率,是防止地下水位上升,避免土壤次生盐碱化最有效的办法,也是节约用水、扩大灌溉面积的一项重要措施。目前我区比较常用的渠道防渗措施有以下几种:一、混凝土防渗在灌区外的大、中渠道,可就地取材浇灌混凝土,规格为300×200厘米,厚6～12厘米;灌区内以预 Reduce channel leakage and improve canal utilization, is to prevent the rise of groundwater levels to avoid secondary salinization of soil the most effective way, but also to save water and expand irrigation area is an important measure. At present, the more commonly used channels in our area seepage control measures are the following: First, the concrete impermeable Outside the irrigation area of ​​large and medium channels, can be drawn on the ground concrete, specifications for the 300 × 200 cm, thickness 6 ~ 12 cm; irrigation area Within the pre-