Chapter 11 WATER. Mr. Manskopf Notes can also be found at http://www.manskopf.com. How many bodies of water can you identify/locate? Is there more or less water on Earth today then there was 1 billion years ago?. Goals for Chapter 11…. Describe where Earth’s water resources are located.
Notes can also be found at http://www.manskopf.com
Is there more or less water on Earth today then there was 1 billion years ago?
Next time you take a drink, think about where that water might have been before.
Next time rain drops fall on you, think about where that water might have been just a few days ago.
It is sacred to some : The Maya believed natural wells, such as the Xkeken cenote in Mexico's Yucatán, led to the underworld.
The continual process by which water moves through living and nonliving parts of our world.
Where does all that water come from???
How does a cattle farmer in Montana potentially impact a shrimp fisherman in Louisiana?
What is a recharge zone?
According to the U.N., 1 billion people do not have access to clean, reliable fresh water
Average person in U.S. uses about 80 gallons a day
Your water footprint
Potable: safe to drink
Most water needs to be treated
Pathogens: organisms that cause diseases
Bacteria, viruses, worms
Industrial Water Use
As much as 80% normally evaporates
Drip Irrigation, reduces that number greatly
California aqueduct brings water hundreds of miles, across deserts, mountains
Reservoir: an artificial lake often behind a dam
Downstream cropland and
estuaries are deprived of
Flooded land destroys forests or cropland and
of water through
Downstream flooding is reduced
Reservoir is useful for recreation and fishing
Can produce cheap electricity (hydropower)
Migration and spawning of some fish are disrupted
Removing salt from salt water
Fastest, easiest way to increase water supplies is to use less water
What are some ways you can conserve water?
Water Pollution: is the introduction of chemical, physical, or biological substances that affects organisms that depend upon it
Pollution coming from one single place
Comes from various sources that are hard to identify and may be spread over a large area
Water that flows down the drain
Too many nutrients (nitrogen and phosphorous) in the water causes algal blooms and decreased oxygen in water
Occurs when temperature of water rises rapidly
Pollution that percolates down from land or surface water pollution
Pollutants directly or indirectly put into oceans
1969 Cuyahoga River in Cleveland caught fire
1972 Congress passes Clean Water Act
1970s Environmental Activism/Awareness
Clean Water Act of 1972 was to “restore and maintain the physical, chemical and biological integrity of the nation’s water.”
Human Population rising?