[Talk] groundwater
I study the scientific foundation of groundwater and take more time to
get the knowledge of many of basic principle.
However , it seems most of people don't concern the news about the science.
so I attempt to post some article to attract people in the board.
The groundwater is the subsurface water flow beneath the water in soils and
geoloical formation are fully saturated.
Most importantly, in the fresh water resource ,
the groundwater take 95% portion,
in contrast, the all river in the world only take the 3.5%.
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