Physical GeographySurface and Ground Water

Lecture Outline 30

Where is the water on earth?

Water Cycle

Pore Spaces

Fractures in Bedrock

What is an aquifer? Rock or sediment that can

HOLD And

TRANSMIT Significant amounts of water

What makes a good aquifer?Porosity

How much room is there for water?

Percentage of pore spaces

Permeability

How well connected are the spaces or cracks?

How easily can water flow through them?

Filtering Capacities

Water Table

Recharge and Discharge

Pumping Well

Groundwater Contaminant Sources

Dead Cow!

“dead cow”

Paths of Groundwater Contamination

Agriculture

Golf Courses and Lawns

Roads

Caves Created by Groundwater

Sink hole

Stream Erosion Dissolving Abrasion

Stream Polish by Abrading

Pothole

Suspended Load

Bottom Load

The Path of a Stream

Base Level

Upper Course Black Canyon of the Gunnison NP

DowncuttingYellowstone

Features in Upper Course

Middle Course

Meander

Deposition along the inside meander

Erosion in the Middle CourseThe Cut Bank

Deposition – Inside Meander

Meander Migration and Formation of Oxbow

Meander migrating downstream

Oxbow in Yellowstone

Natural Levees

Rejuvenation

Lower Course:A stream enters the sea

Mississippi River Delta

The drainage basin, or land area that drains into a particular water body

What is a watershed?

Mississippi River Watershed