As a kind of good impervious material, the geomembrane can be laid on the upstream face of dam, and it is sometimes used as impervious blanket, or embedded in the center of dam as impervious core.

• 复合土工膜作为一种良好的防渗材料可以布置在堤坝的上游面,有时还兼作铺盖进行联合防渗,也可以布置在堤坝的中间作为防渗心墙使用。