GROUNDWATER. WHAT IS THE CHART SHOWING? Water table Zone of aeration Zone of saturation Water table.

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Presentation transcript:

GROUNDWATER

WHAT IS THE CHART SHOWING?

Water table Zone of aeration Zone of saturation Water table

What will make the water table rise? u/meec/module06/Th eWaterTable.htmhttp://techalive.mtu.ed u/meec/module06/Th eWaterTable.htm What will make the water table lower?

Groundwater affects surface water

Permeability

permeability ermeability.htmhttp://techalive.mtu.edu/meec/module06/P ermeability.htm

AQUIFERS Ogallala Aquifer!Needs to be below water table in a permeable layer Ogallala aquifer- ”fastest disappearing aquifer in the world”

WELLS Needs to be in an aquifer

PUMPING WELLS Creates cone of depression Lowers water table Creates a “drawdown”

Formation of a cone of depression in the water table

Cone of depression

subsidence Pumping out gw lowers the surface Surface Slowly sinks

Artesian wells Flows to the surface naturally Under pressure “sandwiched” between two impermeable layers

Flowing vs. non flowing

GROUNDWATER POLLUTION SOURCES –Septic tanks –Landfills –Fertilizers/pesticides –Underground storage tanks (gas stations)

Septic tanks

landfills

Hot springs and geysers Groundwater heated by magma reaches the surface

Steamboat, CO

OLD FAITHFUL Webcam: atures/yell/webcam/ol dFaithfulStreaming.ht ml atures/yell/webcam/ol dFaithfulStreaming.ht ml Eruptions every minutes apart Time is increasing- why? a.org/wikipedia/comm ons/transcoded/4/46/ OldFaithful.ogg/OldFa ithful.ogg.360p.webmhttp://upload.wikimedi a.org/wikipedia/comm ons/transcoded/4/46/ OldFaithful.ogg/OldFa ithful.ogg.360p.webm

hill.com/sites/ /student_view0/ chapter11/animations_and_movies.html# hill.com/sites/ /student_view0/ chapter11/animations_and_movies.html#