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Topic: El Nino
Moisture & Latitude
El Nino In Action• El Nino In Action
El Nino – La Nina
• -• -• El Nino – • La Nina – • -
Topic: Ground Water
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Sun
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Where is the water?Where is the water?SourceSource % of Supply% of SupplyOceans 97.08
Ice Sheets and Glaciers 1.99
Ground Water 0.62
Atmosphere 0.29
Lakes (Fresh) 0.01
Inland Seas / Salt Water Lakes 0.005
Soil Moisture 0.004
Rivers 0.001
Surface storage: -
www.visitusa.com
Runoff: -
http://veimages.gsfc.nasa.gov/6566/Egypt.A2004201.0830.1km.jpg
Infiltrate: -
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Where does your faucet water come from?
Long Island consists of gravels, sand, silt and clays
Ground Water• -
Pore -
Porosity -
Unsaturated -
Saturated –
• Water Table:– -
Fire IslandFire IslandLong IslandLong Island
SoundSound
Great South BayGreat South Bay
You are hereYou are here
Permeability
• -
Impermeable • -
Precipitation
Evaporation
Evapotranspira
tion
Evaporation while
falling
The Water Cycle on Long IslandThe Water Cycle on Long Island
http://www.scwa.com/
Can we influence our groundwater?
www.euwfd.com
FQ:
What can we do to protect our ground water?
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What are the affects of sediments on Groundwater?
Porosity
All the pore space
Which sample has more porosity?
Same
Size vs. Porosity
Particle Size
Poro
sity
Increasing
Increasing
Sorting of Sediments
(sorted)
(unsorted)
Sorting vs. Porosity
Sorting
Poro
sity
Well Sorted
Increasing
Poorly Sorted
Which sample has more porosity?
Shape vs. Porosity
Shape
Poro
sity
Round
Increasing
Flat(Clays
)(sands)
Which sample has more porosity?
Permeability
Which sample is more permeable?
Size vs. Permeability
Particle Size
Perm
eab
ility
Increasing
Increasing
Which sample is more permeable?
Which sample is more permeable?
*As permeability increases, -
Infiltration
SizeLarge
Faster
Small
Size vs. Infiltration
Infiltra
tion
Slower
Slope vs. Infiltration
Slope
Infiltra
tion
Steep
Faster
Gentle
Slower
Water Cohesion and Adhesion
www.atpm.com/13.10/tim-allen/
Water Retention -
upload.wikimedia.org/wikipedia/en/0/0c/Bottle.jpg
Size vs. Water Retained
Size
Wate
r Reta
ined
Large
Increasing
Small
Smaller particles have more surface area to
stick on
Capillarity —
Size vs. Capillarity
Size
Cap
illarity
Large
Increasing
Small
FQ: Describe the porosity and
permeability in unsorted sediments.
