Therefore the impervious face-slab set on upstream face of dam is a key to seepage control of RCC Dams.And the value of impervious face-slab is showed by the impervious effect.

• 因此在碾压混凝土坝上游设置防渗面板是控制碾压混凝土坝渗漏的一个关键环节，而防渗效果则是防渗面板的价值所在。