1. Stream Erosion

2. - The dominant agent of erosion, even in arid climates.
Streams carry sediment in three ways:
a) SOLUTION- Dissolved minerals (___________) are transported this way
b) SUSPENSION- Small particles (_______________: clay and silt) are lifted up.
c) ROLLING AND Large solid sediments (sand, pebbles, etc.) are carried this way.

3. ________________ Load – particles in solution
Suspended Load – particles lifted up above surface
________________– Rolling and Bouncing along bottom

4. Sediment Transport in Motion

5. VELOCITY OF STREAMS
If sediment is to be transported by __________ the water has to be __________
STREAM VELOCITY - The ____________ of a stream (the rate of the stream).
As velocity of a stream ______________ the amount of sediment transported increases
As velocity of a stream increases the size of the particles transported _____________

6. ***See Earth Science*** ***Reference Tables***
VELOCITY
PARTICLE
SIZE
VELOCITY
AMOUNT OF
SEDIMENT
***See Earth Science***
***Reference Tables***

7. Recognize this water park?

8. WHAT DETERMINES STREAM VELOCITY
1. SLOPE- (_____________) As slope increases, the velocity increases.
SLOPE
VELOCITY

9. 2. - The volume of water in the stream
The volume of water in the stream. As the discharge increases, velocity increases.
DISCHARGE
VELOCITY

10. 3. POSITION IN STREAM- The maximum velocity is
just below the surface where there is the least _______.
Minimum velocity near the streambed (___________) – most friction
When a stream is straight the maximum __________ is in the center
When the stream curves or MEANDERS, maximum velocity on outside curve

11. Where would erosion occur and where would sediment be dropped?F E
Stream direction and Velocity
Position of Maximum Velocity A B C D E F
Where would erosion occur and where would sediment be dropped?