1. EROSION and DEPOSITION
WATER
EROSION and DEPOSITION

2. RIVER EROSION

3. Meander
A bend in a river

4. Point to a meander
Point to a meander

5. Really stretched out bend in a river
Gooseneck
Really stretched out bend in a river

6. Point to a gooseneck
Point to a gooseneck

7. Cutbank
The outside of a river bend where erosion happens the fastest because the water is moving faster

8. cutbank 8

9. Bumping and scraping of particles against each other
Abrasion
Bumping and scraping of particles against each other

10. What does water abrasion do to rock?
Trac
What does water abrasion do to rock? 10

11. What shape is this valley?
Trace the shape of the valley 11

13. Water will speed up if: More water is available (discharge increases)
Slope of the channel is steeper
Channel width is narrower

14. RIVER DEPOSITION

16. Point bar
The inside of a river bend where sediment is deposited most because the water is moving slower

17. Point to a point bar
Point to a point bar

18. The extent to which most floods happen – very fertile ground
Floodplain
The extent to which most floods happen – very fertile ground

19. Trace the floodplain
Trace where the floodplain meets the surrounding hills 19

20. Build up of sediment on top of the banks of a river when it floods
Natural Levees
Build up of sediment on top of the banks of a river when it floods

21. Fan-shaped deposit as a river enters a larger body of water
Delta
Fan-shaped deposit as a river enters a larger body of water

22. What is this?

25. Draw the sediments as they would be deposited from the river on the left entering a lake on the right

26. These are crystals that have precipitated out of the water b/c it is moving so slow
Mouth of River
What is the biggest particle dropped by the river that is entering this lake?
What are the purple squares after the clay-sized particles?

27. B A D C F E

28. A B C D E F
Draw the cross-sections in for the different stretches of river

29. Point to a gooseneck and a point bar
Point to a gooseneck and label it G, a point bar (PB)

30. Created when two cutbanks meet and the water cuts off the old meander
Oxbow lake
Created when two cutbanks meet and the water cuts off the old meander

32. SHORELINE EROSION

33. Rock fragments roll back and forth along the shores, grinding together (abrasion)and are usually reduced to sand-sized particles.

34. The overall angle of the waves along the shoreline
Longshore current
The overall angle of the waves along the shoreline

36. What is the next stage for this headland area of the shoreline?

37. Man-made structure perpendicular to the shoreline to control erosion
Jetty
Man-made structure perpendicular to the shoreline to control erosion

38. Which way is the longshore current?
Draw an arrow showing the direction of longshore current
Which way is the longshore current?

39. Sandbars that are “permanently exposed above sea level
Barrier island
Sandbars that are “permanently exposed above sea level

41. Sand spit
Deposits of sand closing off a bay – shows direction of longshore current

42. Which way is the longshore current?
Draw an arrow showing direction of longshore current