1981年冬湖南省溆浦县金家洞中型水库管理所职工,在总干渠漩水湾(通过流量6立方米/秒,灌田6.5万亩),试用三合泥夹塑料薄膜处理防渗50多米,渠道利用系数达到0.95,取得较好的防渗效果。采用这种材料防渗,施工技术简单,节省劳动工日,减少建筑费用。具体做法是:将渠底、渠道两边不起防渗作用的土层 In winter 1981, the staff of Jinjiadong Medium-sized Reservoir Management Office in Xupu County, Hunan Province, experimented with the plastic film of Sanhe Mudstone for seepage prevention 50 at Xunshuwan (flow rate of 6m3 / s and 65,000mu of irrigation) Multi-meter, channel utilization coefficient of 0.95, achieved better anti-seepage effect. Impermeable with this material, construction technology is simple, save labor day, reduce construction costs. The specific approach is: the bottom of the canal, impermeable channels on both sides of the soil layer