如何防治农田灌渠的渗漏,是农家最感头痛的事。一般土渠的渗漏损失都很大,往往在引水途中就有40%左右的水漏掉,耗资、费水、浇地少。为了提高灌渠的防渗能力,增加灌溉经济效益,可采取以下几种简易而有效的防渗方法,供参考选用。1.灰土护面法此法防渗效果很好,一般灰土夯实的渗漏可比土渠减少99%以上,农家易办。所用灰土材料有:①两合土,由石灰与上混合而成。配合比例可为1∶3、1∶6、1∶9(其中以1∶6最佳)。护面厚度一般为20—40厘米。②三合土,由石灰、砂及粘土拌合而成。配合比为1∶1∶3或1∶2∶4。护面厚度一般为10—20厘米。 How to prevent the leakage of farmland irrigation canal is the most troublesome thing in farmhouse. Leakage losses are generally large soil canals, often on the way there are about 40% of the water missed, cost, water, less irrigated. In order to improve the seepage prevention capacity of irrigation channels and increase the economic benefits of irrigation, the following simple and effective anti-seepage methods can be adopted for reference. 1. Lime soil cover method This method seepage control effect is good, the general leakage of solid soil compaction can be reduced by more than 99% of the canal, farmer easy to do. The materials used are: ① two combined soil, made of lime and mixed. The mixing ratio can be 1: 3, 1: 6, 1:9 (of which 1: 6 is the best). Cover the general thickness of 20-40 cm. ② tri-earth, lime, sand and clay from mixing. The ratio is 1: 1: 3 or 1: 2: 4. Hunting thickness is generally 10-20 cm.