2007-04-03 15:41:36 · 2 answers · asked by bunnie 2 in Environment
a watershed acts as a funnel for the underground aquifers. these sometimes can be very deep. and as well can be several layers of aquifers. kinda of like coffee filters stacked up. several miles of distance between wells can mean your tapping a different aquifer.
general rule, 20% of water falling as rain stays in the first, 80% flows off as run-off into rivers and streams. 20% (of the first 20%) then stays in the second aquifer beneath the first. rock strata and soil composition make for differences in absorption rates. these are not hollow pockets in the earth, but pourous sponges of soil where sand may actually make a resivoir for the water to be contained in.
springs arise when pressure from ground, soil and water press down on layers beneath and they suddenly find a path to the surface.
2007-04-03 15:53:41 · answer #1 · answered by johnjohnwuzhere 3 · 0⤊ 0⤋
A watershed is an area of land that drains into a certain lake or river. Water that lands in the watershed can be absorbed into the ground or it can run off. Water that is absorbed can trickle down into an aquifer where the water is called ground water.
2007-04-03 22:56:39 · answer #2 · answered by ecolink 7 · 0⤊ 1⤋