CHAPTER_11_Fluvial
1. Because rivers
constitute such a small percentage of the Earth's total water supply, they play
a small role in landform change. a. True b. False
2. A floodplain
consists of alluvium. a. True b. False
3. A major drainage
basin consists of a single watershed.
a. True b. False
4. Stream width,
depth, and velocity are all responsive to discharge rates.
a. True b. False
4. The suspended
load of a stream's transportation refers to those coarser materials that are
dragged along the stream bed. a. True b. False
6. Erosion of the
valley walls of a channel normally occurs on the outside curve of a
meander. a. True b. False
7. When a stream is
graded (at grade), it has attained its lowest possible gradient and slowest
flow velocity. a. True b. False
8. Nickpoints migrate downstream. a. True b. False
9. Aggradation of a stream channel produces scouring and
alluvial terraces.
a. True b. False
10. Terraces form when
a river's energy increases.
a. True b. False
11. Flood control
often produces conditions of worse flooding in subsequent high-water
events. a. True b. False
12. Deforestation in
the headwater regions of a river can cause the river to flood more frequently
in downstream areas. a.
True b. False
13. A flood recurrence
interval of 100 years means that floods of that size will occur only once every
100 years. a. True b. False
14. The construction
of levees can actually increase the risk of a catastrophic flood.
a. True b. False
Chapter 12
15. The wind has
relatively minor effects on weathering and erosion.
a. True b. False
16. Water is essential
to the formation of a desert pavement.
a. True b.
False
17. The dust in a dust
storm consists primarily of wind-blown sand.
a. True b.
False
18. Saltation accounts for the majority of material transported
by the wind.
a. True b.
False
19. Soils formed from
loess tend to be infertile.
a. True b.
False
20.
a. True b.
False
21. Much of
desertification is due to human actions.
a. True b.
False