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Water Pollution

Water Pollution . Chapter 21. Sources. Point Source . Non Point Source . Types. Organic Inorganic Radioactive Thermal. Organic. Nitrogen Phosphorous Dead Stuff Pathogens Sh ee t. Cultural (anthropogenic) Eutrophication. Cholera . Lake Pollution. Eutrophication. Eutrophication.

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Water Pollution

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  1. Water Pollution Chapter 21

  2. Sources Point Source Non Point Source

  3. Types • Organic • Inorganic • Radioactive • Thermal

  4. Organic • Nitrogen • Phosphorous • Dead Stuff • Pathogens • Sheet Cultural (anthropogenic) Eutrophication Cholera

  5. Lake Pollution

  6. Eutrophication

  7. Eutrophication

  8. River Pollution

  9. Fig. 21-4, p. 497

  10. Groundwater Pollution

  11. Polluted air Pesticides and fertilizers Hazardous waste injection well Deicing road salt Coal strip mine runoff Buried gasoline and solvent tanks Gasoline station Pumping well Cesspool, septic tank Water pumping well Waste lagoon Sewer Leakage from faulty casing Landfill Accidental spills Discharge Unconfined freshwater aquifer Confined aquifer Confined freshwater aquifer Groundwater flow Fig. 21-7, p. 501

  12. Leaking tank Aquifer Bedrock Water table Groundwater flow Free gasoline dissolves in groundwater (dissolved phase) Gasoline leakage plume (liquid phase) Migrating vapor phase Water well Contaminant plume moves with the groundwater Fig. 21-8, p. 502

  13. Ocean Pollution

  14. Industry Nitrogen oxides from autos and smokestacks, toxic chemicals, and heavy metals in effluents flow into bays and estuaries. Cities Toxic metals and oil from streets and parking lots pollute waters; Urban sprawl Bacteria and viruses from sewers and septic tanks contaminate shellfish beds Construction sites Sediments are washed into waterways, choking fish and plants, clouding waters, and blocking sunlight. Farms Runoff of pesticides, manure, and fertilizers adds toxins and excess nitrogen and phosphorus. Red tides Excess nitrogen causes explosive growth of toxicmicroscopic algae, poisoning fish and marine mammals. Closed shellfish beds Closed beach Oxygen-depleted zone Toxic sediments Chemicals and toxic metals contaminate shellfish beds, kill spawning fish, and accumulate in the tissues of bottom feeders. Oxygen-depleted zone Sedimentation and algae overgrowth reduce sunlight, kill beneficial sea grasses, use up oxygen, and degrade habitat. Healthy zone Clear, oxygen-rich waters promote growth of plankton and sea grasses, and support fish. Fig. 21-10, p. 505

  15. Plastic http://www.ted.com/talks/capt_charles_moore_on_the_seas_of_plastic.html http://www.bluecommunity.info/video/view/171869/?topic=75645

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