Question

chapter 6 running water and groundwater
deposition

1. when stream flow decreases to below the critical settling velocity of a certain size particle, ______________ occurs.
2. how does a delta form? ______________
3. circle the letter that represents natural levees in the figure below.

a. a b. b c. c d. d

(figure of a stream and related landforms)

stream valleys

1. circle the letter that represents an oxbow lake in the figure above.

a. a b. b c. c d. d

1. what shape will a stream valley have if its primary work has been downward erosion cutting toward base level?

______________

1. a stream’s ______________ is the flat valley floor onto which it overflows its banks during flooding.

floods and flood control
match each description with its term.

description term
a. artificial levees

1. earthen mounds built on river banks

b. floods
c. flood - control dams

1. structures that store floodwater and let it out slowly
2. mostly caused by rapid snowmelt and storms

drainage basins

1. a(n) ______________ is an imaginary line separating different drainage basins.
2. the land area that contributes water to a stream is known as a(n) ______________

Explanation:

Answer:

1. deposition
2. A delta forms when a stream enters a standing body of water, such as an ocean or lake, and its velocity decreases, causing it to deposit its sediment load.
3. b. B
4. d. D
5. V-shape
6. floodplain
7. a. artificial levees
8. c. flood-control dams
9. b. floods
10. divide
11. drainage basin (or watershed)