不渗透层将水蓄积在一个叫做“饱和层”的地方。
The non-porous layer holds the water in an area called the saturated zone.
一个在上面那个不渗透层的上部，另一个在两个不渗透层之间。
One is on top of the upper non-porous layer, the other is between the two non-porous layers.
雨水向下流，流到不渗透岩石层，接着，向旁边流到河流穿过岩石层的那个地方。
Rainwater flows down to the non-porous layer of rock, and then it flows sideways to where the river cuts through the rock layers.
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