薄膜防渗,就是使用塑料薄膜铺砌在渠道上,并覆盖一定厚度的保护层,以达到防止水渗漏的一种防渗方式。据国内外使用情况说明,采用这一防渗方式,具有防渗效果好、工程造价低、运输量少和施工简便等优点。国内不少兄弟省区,60年代中期开始采用薄膜防渗。如山西汾河二坝东西干渠,于 Impermeable membrane, is the use of plastic film paved in the channel, and cover a certain thickness of the protective layer, in order to achieve a way to prevent leakage of water seepage. According to the instructions at home and abroad, the use of this anti-seepage method has the advantages of good anti-seepage effect, low construction cost, less transportation and simple construction. Many brothers and provinces in China, the mid-60s began to use film impermeable. Such as Shanxi Fen River dam trunk, at