防止渠道渗漏,对于节约灌溉用水,扩大灌溉效益,降低地下水位,防止土壤盐碱化,都有重要作用。为了进一步开展渠道防渗工作,现将我国目前较普遍采用的几种防渗措施简介如下。一、土料防渗土料防渗主要分为粘土、黄土、灰土及三合土四种类型。根据广西僮族自治区、福建等省的调查试验,粘土护面一般可减少渗漏损失50～70％,有的达95％。青海省东原渠部分渠段,采用粘土内掺30～40％砾石在全断面上夯实,厚度50 To prevent leakage of channels, for the conservation of irrigation water, expand irrigation benefits, reduce groundwater levels, prevent soil salinization, have an important role. In order to further carry out anti-seepage channel work, now our country more commonly used several anti-seepage measures are as follows. First, soil impermeable material Seepage prevention is divided into clay, loess, lime soil and trigeminy four types. According to the Guangxi Tongzu Autonomous Region, Fujian and other provinces of the test test, the clay surface can generally reduce the leakage loss of 50 to 70%, and some 95%. Part of the East Canal in Qinghai Province, part of the canal, the use of clay mixed with 30 to 40% gravel compaction in the whole cross-section, the thickness of 50