Water Pollution 1 The Epidemic… (Intro for Poison Pump) In 1854, hundreds of people living in London died during a cholera epidemic. The disease spread from India to London. Cholera is characterized by rapid dehydration resulting from vomiting, diarrhea and sweating. Victims may suffer only mild symptoms or can die in less than an hour. Dr. John Snow, considered the father of epidemiology, is credited with tracking and identifying the source and transmission agent of the 1854 cholera epidemic. Your team has been given the same information that Dr. Snow possessed. As a team your mission is to try to solve the mysterious epidemic. You have been given a Broad Street Area map, a set of victim cards and a marker. Using the information make a chart comparing all common characteristics among the victims. Use the marker to mark the location of the victims. The class will share their conclusions (locating and explaining the source of the epidemic) with the other teams. Additional information uncovered by Dr. Snow will then be provided to all teams. Teams will be given time to confirm or revise their original conclusions. After confirming or revising, teams will again share their conclusions.
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Water Pollution - Weebly · Water Pollution 2 Pollution Two types of pollution Point pollution – pollution that comes from a single identifiable source such as a pipe that dumps
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Transcript
Water Pollution
1
The Epidemic… (Intro for Poison Pump)
In 1854, hundreds of people living in London died during a cholera
epidemic. The disease spread from India to London.
Cholera is characterized by rapid dehydration resulting from
vomiting, diarrhea and sweating. Victims may suffer only mild
symptoms or can die in less than an hour.
Dr. John Snow, considered the father of epidemiology, is
credited with tracking and identifying the source and
transmission agent of the 1854 cholera epidemic.
Your team has been given the same information that Dr. Snow
possessed. As a team your mission is to try to solve the
mysterious epidemic.
You have been given a Broad Street Area map, a set of victim
cards and a marker. Using the information make a chart
comparing all common characteristics among the victims. Use
the marker to mark the location of the victims.
The class will share their conclusions (locating and explaining
the source of the epidemic) with the other teams. Additional
information uncovered by Dr. Snow will then be provided to all
teams. Teams will be given time to confirm or revise their
original conclusions. After confirming or revising, teams will
again share their conclusions.
Water Pollution
2
Pollution
Two types of pollution
Point pollution – pollution that comes from a single identifiable
source such as a pipe that dumps oil or toxic chemicals from a
factory in to a lake, stream, or river. (It is a source you can point
to.) Some towns use septic tanks, which can pollute the ground
water.
Non-point Pollution – pollution that cannot be traced to a specific
point, but comes from many places
We are concerned about non-point pollution; because with the
development, this is the main problem in Atlanta. The city of
Atlanta is working diligently to repair the damage they have done
in the past by allowing factories to dump sewage and other
chemicals in the Chattahoochee.
Examples of Non-point:
Thermal pollution – heating the water causes the level of
dissolved oxygen to lower. With less oxygen in the water,
fish and other aquatic life can be harmed or killed.
Caused by: Storm run-off
Sediments – soil, sand, silt, clay wash from land into the
creeks. Caused by poor construction practices. Large
quantities are considered pollution. (Silt screens)
1. Cause flow to slow down
2. Suffocate fish and shellfish
3. Darkens the color of water making it attract sunlight,
causes the water to heat up (What does this do to level
of oxygen?)
4. Slows down plant growth that provides oxygen
Metals and Plastics – remain in the water, are not
biodegradable, can be poisonous for most forms of life
Water Pollution
3
Nutrients - Concentration of nitrogen and phosphorous –
these are used for plant growth Ex. Fertilizers, household
detergents These cause algae in the water to bloom and
multiply – As the algae dies, oxygen is needed to decompose
the algae. (When the oxygen is depleted, what happens?)
Acid Rain - rain that has been affected by pollution in the
air, When water becomes too acidic or basic, sensitive fish
and other organisms cannot survive
Pesticides – designed to kill or limit the growth of weeds
and insects on crops and lawns. These flow into the creeks
or groundwater causing chemical imbalance in the water.