Chapter 18 E3 - Surface Water

Question 1

land area that contributes water to a river system

Answer 1

drainage basin

Question 2

what separates drainage basins

Answer 2

a divide

Question 3

cross sectional view of a stream

Answer 3

stream profile

Question 4

______ decreases from the head to the mouth

Answer 4

gradient or slope; channel roughness; grain size

Question 5

factors that increase downstream

Answer 5

velocity and discharge and channel size

Question 6

rougher stream channels means

Answer 6

greater turbulence and decreased average velocity

Question 7

the three types of erosion of streams

Answer 7

abrasion, dissolution, and scour (lifting of loose particles

Question 8

transported material in a stream

Answer 8

the stream’s load

Question 9

maximum particle size

Answer 9

competence

Question 10

maximum load

Answer 10

capacity

Question 11

caused by a decrease in velocity so the competence is reduced and sediment begins to drop out

Answer 11

deposition

Question 12

known as alluvium and are well sorted deposits

Answer 12

stream sediments