water pollutionbiological water pollution 1. infectious disease indirect (water breeding carriers):...
TRANSCRIPT
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Water pollutionWater pollution
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Available WaterAvailable Water••Total = Total = 326 326 million million
cubic miles cubic miles
••9797% of Earth% of Earth’’s water s water is in oceansis in oceans
••22..997997% is locked up in % is locked up in ••22..997997% is locked up in % is locked up in ice caps and glaciersice caps and glaciers
••00..003003% is easily % is easily accessible accessible
––Soil moistureSoil moisture
––GroundwaterGroundwater
––Water vaporWater vapor
––LakesLakes
––StreamsStreams
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Water Supply & UseWater Supply & Use
http://ga.water.usgs.gov/edu/waterdistribution.html
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What is Water Pollution?What is Water Pollution?
any physical (temperature, oxygen), chemical (mercury),
or biological (disease, sewage) change to water that
adversely effects its use by living thingsadversely effects its use by living things
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Types of Water PollutionTypes of Water Pollution
1. BiologicalMeasured in:
Percent (%)1. Biological
2. Chemical
3. Physical
Percent (%)
Parts per thousand (‰)
Parts per million (ppm)
Parts per billion (ppb)
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Biological Water PollutionBiological Water Pollution
1. Infectious Disease
Direct (microbes in water):
Typhoid, cholera,
dysentery, hepatitis…1. Infectious Disease
(Pathogens)
2. Oxygen-Demanding
Waste
Entamoeba histolytica
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Biological Water PollutionBiological Water Pollution
1. Infectious Disease
Indirect
(Water breeding carriers):
malaria, yellow fever,
west nile virus…1. Infectious Disease
(Pathogens)
2. Oxygen-Demanding
Waste
Treehole mosquito
(carried La Crosse ensephalitis)
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Biological Water PollutionBiological Water Pollution
1. Infectious Disease1. Infectious Disease
(Pathogens)
2. Oxygen-Demanding
Waste
� Sewage
� Animal Waste
� Food Waste
� Paper Pulp
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Dissolved OxygenDissolved Oxygen
Added by: turbulent water and photosynthesis
Removed by: Increased temperature
(exsolution) and respiration/decomposition
Good: > 6 ppm
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Oxygen SagOxygen Sag
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Chemical Water PollutionChemical Water Pollution
3. Nutrients (Fertilizers)3. Nutrients (Fertilizers)
4. Toxic Inorganic
Materials
5. Persistent Organic
Pollutants (POP’s)
Nitrogen, phosphorous
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Chemical Water PollutionChemical Water Pollution
3. Nutrients (Fertilizers)
1. Heavy metals
� mercury,lead, tin…
2. Super Toxic Elements
� Arsenic, selenium…3. Nutrients (Fertilizers)
4. Toxic Inorganic
Materials
5. Persistent Organic
Pollutants (POP’s)
� Arsenic, selenium…
3. Acids, salts, chlorine
4. Radioactive Isotopes
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Chemical Water PollutionChemical Water Pollution
3. Nutrients (Fertilizers)3. Nutrients (Fertilizers)
4. Toxic Inorganic
Materials
5. Persistent Organic
Pollutants (POP’s) Aldrin, Chlordane, DDT, Dieldrin, Endrin,
Heptachlor, Hexachlorobenzene
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Physical Water PollutionPhysical Water Pollution
6. Sediment
7. Thermal Pollution
8. Solid Waste
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Physical Water PollutionPhysical Water Pollution
6. Sediment
7. Thermal Pollution
8. Solid Waste
Causes:
� industry
� dams
� removal of vegetation
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Physical Water PollutionPhysical Water Pollution
6. Sediment
7. Thermal Pollution
8. Solid Waste
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Pollution Sources:Pollution Sources:Point SourcePoint Source
1. Sewage pipes
2. Leaky gas tanks
3. Industrial sites
4. Injection wells
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Pollution Sources:Pollution Sources:Nonpoint SourceNonpoint Source
1. Agriculture (soil, fertilizer,pesticides)
2. Urban runoff (from pavement)
3. Construction sites
4. Air Pollution4. Air Pollution
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Controlling Water QualityControlling Water Quality
What can we do?What can we do?
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SolutionsSolutions
1. Legislation
2. Source Reduction
3. Improved Land Use Practices3. Improved Land Use Practices
4. Remediation
5. Sewage Treatment
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SolutionsSolutions
1. Legislation
2. Source Reduction
3. Improved Land Use
1. Remove lead from gasoline
2. Reduce road salting
3. Decrease erosion
4. Banning phosphates in detergents
5. Reduce fertilizer use, etc.3. Improved Land Use
Practices
4. Remediation
5. Sewage Treatment
5. Reduce fertilizer use, etc.
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SolutionsSolutions
1. Legislation
2. Source Reduction
3. Improved Land Use
1. Reduce clear cutting
2. Preserve wetlands
3. Better construction practices
3. Improved Land Use
Practices
4. Remediation
5. Sewage Treatment
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SolutionsSolutions
1. Legislation
2. Source Reduction
3. Improved Land Use 3. Improved Land Use
Practices
4. Remediation
5. Sewage Treatment
Water hyacinths absorb arsenic
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SolutionsSolutions
1. Legislation
2. Source Reduction
3. Improved Land Use 3. Improved Land Use
Practices
4. Remediation
5. Sewage Treatment
West Point Treatment Plant, Seattle
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