1. Hydrology NOTES page 8 Erosion ©Mark Place, 2007-2008

2. the movement of weathered material
EROSION
the movement of weathered material

3. the movement of weathered material
EROSION
the movement of weathered material

6. Greatest
FORCE
Greatest
AGENT
gravity
water

7. carving out V-shaped valleys?
What agent of erosion
is responsible for
carving out V-shaped valleys?
r i V e r s
Figure A steep mountain stream eroded a V-shaped valley into soft shale in the Canadian Rockies.
running water

8. carving out U-shaped valleys?
What agent of erosion
is responsible for
carving out U-shaped valleys?
glaciers

9. Slope

11. Erosion rate versus slope
Olympic Mountains

12. Discharge
the amount of water

14. Rate of Erosion
Stream Discharge

15. Meandering Streams

16. Where is
erosion
greatest?
Outside of Curve -
Cut Bank

17. Where does the river flow fastest? A-A' = Center just below the
surface
B-B' and C-C' = outside of curve

18. Oxbow
Lakes
New Mexico DEMO

19. What page can this graph
be found in the ESRTS?
Page 6

20. What’s the minimum speed water needs to be moving in order
to transport sand?
0.4 cm/sec

21. In order to move a particle that is 7.0 cm, a stream’s velocity
would need to be at
least _______ cm/sec.
200 cm/sec

22. Wind Erosion
desert wind erosion
pitted

23. How sand dunes form