To become groundwater,
rain must fall, then seep through the soil down to the water
table, like water going through a coffee filter on its way to
the pot. But sometimes water never has a chance to get into
the ground. Instead, it washes off parking lots or other paved
areas, eventually making its way into lakes or streams.
Forests are very good at allowing water to enter the ground
and recharge the water table. The soil, shade and organic materials
under trees help hold moisture so it can be absorbed and replenish
groundwater levels.
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