Ch21 Water Supply, Use & Management

Front 1

The principal reason to channelize natural streams and rivers is

Back 1

for flood control

Front 2

channelization

Back 2

consists of straightening, deeping, widening, clearing, or lining existing stream channels

Front 3

Adverse environmental effects of channelization include all of the following EXCEPT:
A. a less diverse range of habitats for aquatic species
B. loss of wetlands
C. increased flood hazard along channelized segments of streams
D. aesthetic degradation
E. loss of riparian vegetation

Back 3

C

Front 4

the Colorado River is noteworthy because

Back 4

it supplies water to a large portion of the arid southwest United States

Front 5

modern per capita use of water around the world is closest to __gallons per person per year. Assume a world population of about 6.3 Billion.

Back 5

290,000

Front 6

Groundwater overdrafting can have all of the following effects EXCEPT:
A. lowering of the water table
B. uplift of the land surface
C. salt water intrusion
D. loss of riparian vegetation
E. reduced porosity in aquifers

Back 6

B

Front 7

Desalination is a promising source of water for some locations because

Back 7

desalination is a potential water source for even the most arid coastal area

Front 8

Hydroelectric power generation on a river is an example of

Back 8

instream use

Front 9

Why are burned hillsides with steep slopes subject to hazardous mudslides the next rainy season?

Back 9

vegetation is killed and the cohesion of the soil is much reduced

Front 10

"Instream use" refers to uses of a river itself, without removing water from it.

Back 10

true

Front 11

Sinkholes are not associated with sandstone bedrocks

Back 11

true

Front 12

TF:Overdrafting is the excessive withdrawal of groundwater

Back 12

True

Front 13

TF:An artesian spring is the natural outflow of water from a natural spring

Back 13

false

Front 14

TF:Saltwater intrusion is the invasion of saltwater into freshwater supplies

Back 14

true

Front 15

An aquifer is a rock that holds and__water

Back 15

transmits

Front 16

In the United States, the single sector that consumes the greatest portion of water supplies is

Back 16

agriculture

Front 17

Most groundwater originates from

Back 17

rainfall

Front 18

The unsaturated zone above the water table is called the

Back 18

vadose zone

Front 19

Areas that are inundated by water or saturated with water to a depth of a few centimeters for at least a few days a year are called

Back 19

wetlands

Front 20

Use of groundwater at a rate faster than it is naturally re-supplied

Back 20

overdraft

Front 21

Model that tracks the rates of input, rates of output, and storage of water in a region or in a water system

Back 21

water budget

Front 22

What is an aquifer?

Back 22

a rock that holds and transmits water

Front 23

What is overdrafting?

Back 23

excessive withdrawal of groundwater

Front 24

97 % of all water on Earth is in the oceans. Which of the following is the correct order of the Earth's water storage compartments from largest to smallest

Back 24

ocean, ice caps, groundwater, lakes, atmosphere, rivers

Front 25

Which of the following effects can be associated with groundwater overdraft

Back 25

salt water intrusion

Front 26

Floodplains have all of the following advantages for urbanization and construction except

Back 26

the floodplain surface is safe from flooding

Front 27

Shallow subsurface flow of water within the soil but above the water table is known as

Back 27

throughflow