kickass Env Sci test 3

What are the 3 major fluvial geomorphical processes?

Stream Erosion

We Will Write a Custom Essay Specifically
For You For Only $13.90/page!

order now

Stream transportation

Stream Deposition

What is Hydraulic Action?
The force of dragging against surfaces over which a river is flowing.

EX:  Sand in the water

What shape does water cut objects resemble?
True of false.

The faster the water flows the more erosive power it has?

What is stream-load?
The objects carried by the stream
What is Bed-Load?
Objects dragged at the bottom of the stream
What is the suspended load?
Objects mixed into the water.

EX Mud water

If a river has a higher slope can it pick up more objects?
Yes, it has a faster speed making it more powerful
Where is the river flowing fastest at?
The middle (has least friction)
How far does a river decend every mile?
6 inches
What is Gradation?
The process of objects trying to reach one slope
Why do cliffs have such rugid edges?
When the waves beat against the cliffs they get lighter and lift and repeats
What happens whn  river goes around a corner?
On the inside edge of the river it slows down, but the outside edge of the river speeds up.
What happens as a river goes around a curve (not dealing with speed).
The river deposits its load on the inside edge and erodes the outside edge
What is an Ox-bow?
The area where water no longer flows after the river changes paths (anyting left in the ox-bow will be stranded)
What is a Meander?
The curve of the river
What happens when a river slows down?
It will drop its load
What happens when a river reaches the ocean?
It creates a Delta
What is a delta?
Depoited material deposited in the sea (very flat and at sea level)
Why do we have spring floods?
The snow in the mountains melts increasing water flow
What is the flood plain?
The part of the river where the river flows over out of the bank during a flood.
What is a natural Levee?
A natural bank of deposited material from the river flooding meeting friction
Where is the back swamp?
The area where water after the levee where the water is standing still
What are Chewiers?
Slightly higer gounds on the levee.

Usually trees grow here

What are tributaries?
Network of water from small to large
What are distributaires?
Network of water from Large to Small
Who controls the water networks?
The Army core of Engineers
What is a pin?
A giant concrete slab that is moveable in order to rise or lower river levels
What is the bottomland?
The flat area behind the levvee’s
Why are man-made Levees good/bad
Good:; They allow people to live in areas where a flood would normally make in un-liveable.

Bad:; They send more water downstream and get rid of silt in areas upstream

What is Brackish Water?
Fresh/sea salt mix (grass can grow here)
What are Navigable waters?
Water that can float a boat
What is a flash flood?
A quick overnight rainfall causing flooding locally.
What is Irregation?
Transportation sysptem of water.
What is Point-source pollution?
Pollition that you can identify where it came from.
What is non point source pollution
Generalized pollution coming off of the land.

EX:; Fertalisers/pestacides

What is an Estuary?
A place where a river meets the sea.

Deltas occur here

What causes the waves?
The wind
Where does wind erison usually occur?
In dry areas with little vegetation.
What is deflation?
The romval of soil forom the serface
What are sand dunes
Large piles of sands

EX: beaches/deserts

Why do sand dunes move?
The dunes move because the wind blowing the sand over the dunes and cause it to move little by little
How do you stop a dune from moving?
Plant plants on the side where the wind is blowing from mainly
What are Loesses?
Deposits of materil due to glacial gathering and depositing
What are Aeolians?
Wind blown deposits
What are some of the characteritcs?
It is very light, easy to cut, and holds a very high angle of rupuse.
How deep are glaciers on average?
2-3 miles
What is Albedo?
The idea that the suns rays hit something white and reflect off.
How do glaciers expand?
The preasure on the center causes them to go out
Glaciers are an extreme force of erision due to griding across the ground/refreezing and plucking rocks
What are Striations?
Groves/lines left from glacier erosion
What is a Moraine?
A hill of deposited materail due to glaciers melting.
What is the whole in a mountain called caused from glaciers?
What is a horn?
A sharp peak caused from cirques removing material
What is the hydrologic cycle?
The cycle of water on the earth
What are the stages of The hydrologic cycle?
Evaportaion, precipitation, run off
Why does sea level go down during ice ages?
There is evaporation, but there is not run-off into the ocean so it just lowers the sea level during the precipitation phase in the form of snow