Water gradually escapes by seepage through the ground.

水逐渐从地上渗走了。

《牛津词典》

Groundwater is the word used to describe water that saturates the ground, filling all the available spaces.

地下水这个词描述的是水浸透土地，并填充所有可利用的空间。

youdao

Then it can pollute the natural water in the ground.

然后它可能会污染地下的天然水。

youdao

Between thirty and thirty-five women used each system to pump water from the ground or a stream.

VOA: special.2010.01.11

Some property owners are replacing grass with ground covers that require less care and water.

VOA: special.2009.07.07

In the center,at ground level, is a round pool of water.

VOA: special.2009.05.25

You know lighting tap water, polluting ground water and all the rest.

FORBES: How The UK Government Has Decided To Kill Fracking For Shale Gas

On Thursday I reported from the CEH on the latest findings about how much water has soaked into the ground - and saw a bore-hole used for measuring water levels actually spouting out water because the ground was so saturated.

BBC: Predicting the next big flood

He said that "means worrying about the way in which the drilling takes places, it means worrying about making sure the methane is captured rather than discharged to the air and it means making sure that none of the contaminated water gets into the ground water that sometimes can fill our water supplies".

BBC: UK