hydrosphere (day 2)day-2).pdf · objectives: 1) define water shed. 2) draw a simple picture that...

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Objectives: 1) Define water shed. 2) Draw a simple picture that

illustrates water movement in a watershed. 3) What watersheds

does Con. Creek belong to? 4) What are some sources of

groundwater pollution?

A WatershedA Watershed

DefinitionDefinitionDefinitionDefinition

• The total land area

that contributes

water to a stream or

lake.

• Also called a

“Drainage Basin”

Feel the FlowFeel the Flow

– Watershed boundaries are the highest points

of land

– Waterways are the

lowest points of land

Water follows the path

of least resistance…

DOWNHILL

Scale Scale Scale ScaleScale Scale Scale Scale

• Watersheds work on

different scales

* small creeks have

small watersheds

Allegheny River

Connoquenessing Creek

Little

Connoquenessing

Creek

* large creeks include

the watersheds of

many small creeks

* rivers include the

combined watersheds of many large creeks

Pennsylvania’s WatershedsPennsylvania’s Watersheds

• The Six Watersheds in Pennsylvaniahttp://www.dep.state.pa.us/dep/deputate/watermgt/Wc/Subjects/WSNoteBks/shedtable.htm

The Ohio River WatershedThe Ohio River Watershed

• The land area drained by the Ohio River

PA

OH

KY

WV

VA

NC

TN

MD

NJ

INIL

DE

2

The Ohio River WatershedThe Ohio River Watershed

• The land area drained by the Ohio River

PA

OH

KY

WV

VA

NC

TN

MD

NJ

INIL

DE

The Ohio River WatershedThe Ohio River Watershed

• The land area drained by the Ohio River

PA

OH

KY

WV

VA

NC

TN

MD

NJ

INIL

DE

The Allegheny

River Watershed

The Allegheny

River Watershed

• The land area

drained by the

Allegheny River

Water You Don’t SeeWater You Don’t See

Groundwater DefinitionGroundwater DefinitionGroundwater DefinitionGroundwater Definition

• Water beneath the earth's surface in a

zone of saturation

http://ga.water.usgs.gov/edu/earthgwaquifer.html

Unsaturated Zone

Saturated Zone

Water Table

Groundwater

Rock On!Rock On!

• Rocks, made of many

chemical compounds,

slowly dissolve in

groundwater

• Some types of rock

slow the movement of

groundwater and

direct its flow

http://www.gpc.peachnet.edu/~pgore/geology/geo101/sedstr.htm

Deep Down PollutionDeep Down Pollution

• Polluted surface water

contaminates

groundwater supplies

• Pollution can leach

from landfills, farms,

and lawns

3

We Use GroundwaterWe Use Groundwater

• The main source of

drinking water

• Used for agricultural

practices

• Supplies streams with

water between rain

events TransportationTransportationTransportationTransportation

RecreationRecreationRecreationRecreation

IndustryIndustryIndustryIndustry

AgricultureAgricultureAgricultureAgriculture

Waste TreatmentWaste TreatmentWaste TreatmentWaste Treatment

How We Use WaterHow We Use Water

Errors of the Past…and PresentErrors of the Past…and Present

http://www.wqed.org/erc/pghist/units/WPAhist/index.html