Groundwater_fill-in version

Groundwater_fill-in version - 2) How fast does water move...

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12/9/10 How does a river keep flowing if there’s no runoff 11 If it hasn’t been raining for a while, where does the river get its water from?
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12/9/10 Groundwater keeps it flowing! Groundwater Originates from ___________ that soaks into the ground through porous sand, soil and rock until it is stopped by an impenetrable layer where it accumulates. 22
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12/9/10 Importance of groundwater Comprises <1% of world’s water YET Is the world’s most extracted resource Makes up a 33
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12/9/10 Groundwater Terms Precipitation : it is repeated rainfall that maintains the water table Zone of aeration : spaces between rocks and soil are filled with ______ Water cannot be drawn from this zone Saturated zone : spaces between soil and rocks are filled with ________ 44
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12/9/10 Long Island’s Aquifers 55 We utilize a large aquifer system on Long Island (L.I. has 3 principal aquifers)
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12/9/10 Movement of Groundwater 1) Groundwater moves through the aquifer
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Unformatted text preview: 2) How fast does water move in the ground? 1) It moves much _________ than in rivers and streams because it has to move through porous solid materials 2) The speed of groundwater flow is measured in cm/day or m/year 66 12/9/10 Recharge vs. Discharge 1) Groundwater recharge: 1) Replenishes groundwater supply 2) Occurs where water seeping into land reaches the saturation zone 2) Groundwater discharge: 1) Lowers groundwater supply 2) Occurs where groundwater moves out to 77 12/9/10 Groundwater Terms http://www.uky.edu/AS/Geology/howel 88 12/9/10 A spring is an example of 99 12/9/10 Groundwater Issues (limited supply) It can take 100s-1000s of years for groundwater to accumulate, so we need to be careful about aquifer depletion Aquifer depletion is caused by the excessive ___________ of groundwater (when is it excessive?) When the rate of removal is much 1010...
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This note was uploaded on 12/08/2010 for the course NSC 2004C taught by Professor Farell during the Fall '09 term at Dowling.

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Groundwater_fill-in version - 2) How fast does water move...

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