Transcript Much of the world`s fresh water is unavailable to us because:

Much of the world’s fresh water
is unavailable to us because:
1. It is in deep and
inaccessible aquifers
2. It exists in the form
of water vapor
3. It is mixed with
saltwater
4. It is locked up in ice
caps or glaciers
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Which country has more fresh
water, Canada or China?
1. Canada
2. China
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About 2/3 of the world’s annual runoff is lost
by _____ and is not available for human
use.
1. Evaporation
2. Percolation into
the ground
3. Pollution of the
water supply
4. Seasonal floods
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Most water is withdrawn from
surface waters and aquifers for:
1. Drinking water
2. Industrial
manufacturing
3. Irrigation of crops
4. Cooling power
plants
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Porous, water-saturated layers of sand,
gravel, or bedrock through which
groundwater flows make up a(n):
1.
2.
3.
4.
Aquifer
Watershed
Zone of aeration
Eutrophic zone
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One trend in managing water
resources is:
1. Privatization
2. Government
seizure of
privately-held
water supplies
3. Public utility
ownership
4. None of the
choices
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True or false? Innovative conservation
strategies assure California of an adequate
water supply for at least this century.
1. False
2. True
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Diversion of water from the Aral
Sea has led to:
1. Decrease in its
salinity
2. Increased crop
yields in the
neighboring areas
3. Extinction of native
fish species
4. More moderate
temperature and
increased rain
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True or false? Distillation is one
method of desalinating water.
1. True
2. False
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Which of the following is not a stated means
of preventing groundwater depletion?
1. Reduce stream flow
levels
2. Ban new wells
3. Tax water pumped
from wells near
surface water
4. Switch to less waterintensive crops
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Which is the most efficient
irrigation technique?
1. Gravity flow
through ditches
2. Center pivot
sprinkler systems
3. Surge valves
4. Drip irrigation
systems
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_____ is reclaimed water from
sinks, tubs, and washers.
1.
2.
3.
4.
Sludge
Brown water
Gray water
Treated water
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True or false? Water meters
reduce water waste.
1. True
2. False
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The removal of vegetation, especially
on hillsides increases the risk of:
1. Salinization
2. Groundwater
overdrafts
3. Saltwater
intrusion
4. Flooding
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From an environmental viewpoint, the best
approach to reducing flood risks is:
1. Floodplain
management
2. Channelization
3. Artificial levees
4. Flood control
dams
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Which of the following is not one
of the causes of water scarcity?
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2.
3.
4.
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Dry climate
Erosion
Desiccation
Drought
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True or false? Dams can lose
more water than they provide.
1. True
2. False
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Which of the following is not a stated
concern about China’s Three Gorges Dam?
1.
2.
3.
4.
The reservoir will force
the displacement of
over a million people
The reservoir will flood
important
archaeological sites
The dam may not be
able to withstand the
impact of an earthquake
The dam will increase
China’s dependence on
coal
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Which of the following is not a
main factor in water scarcity?
1. Dry climate
2. Increased damming
of rivers and building
of reservoirs
3. Drought
4. Too many people
using reliable water
source
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True or false? Since the 1960’s the Aral Sea
in the former Soviet Union is going dry as a
result of a large scale water transfer project.
1. True
2. False
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Which of the following is a strategy
to use water more sustainably?
1.
2.
3.
4.
Build more dams and
levees
Regulate withdrawals
to prevent depletion of
renewable aquifers
Slow the rate of ozone
depletion
Increase efficiency
and productivity in
livestock production
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