塑料薄膜防渗渠道,多年来已在北京、河南、山西等省、市大量推广。我区农垦系统自1973年起,已在一些农场试验。实践证明用塑料薄膜防渗具有以下的好处: 1.减少渗漏,提高渠道利用率据农垦一团的调查,渠道利用率由原来土渠的92.15％提高到98.53％,减少了原渗漏量的81.3％。并促成地下水位下降。据一○二团场观测,防渗后,距干渠五米处地下水埋深从0.01—0.77米下降为1.66—1.84米;距干渠20米处从 Plastic film impermeable channels, over the years in Beijing, Henan, Shanxi and other provinces and cities to promote a large number. Our area farming system has been tested on some farms since 1973. Practice has proved that the use of plastic film seepage control has the following advantages: 1. Reduce leakage and improve channel utilization According to a survey by Nongken Group, the channel utilization increased from 92.15% of the original canal to 98.53%, reducing the original leakage Of 81.3%. And contribute to the decline of the water table. According to the observation of 102 groups of fields, after the seepage prevention, the groundwater depth at a depth of five meters from the trunk channel decreased from 0.01-0.77 meters to 1.66-1.84 meters; at a distance of 20 meters from the main canal