Michigan Environmental Education Curriculum The Watershed Concept
Some of the precipitation that falls on land seeps
into the ground where it is stored in aquifers and is transported
to streams and lakes by subsurface flow. The amount of infiltration
is influenced by the permeability and moisture content of the soil,
the presence of vegetation and the volume and intensity of precipitation.
The amount of water in an aquifer is indicated by the height of
the water table (the upper boundary of aquifer). This animation
illustrates the effect of soil permeability (large particles have
large spaces between them and let more water in) and precipitation
volume (large rain events can lead to more infiltration) on the
amount of water stored in the aquifer.