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.