Water pollution
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Water Pollution. G. Tyler Miller’s Living in the Environment 13 th Edition Chapter 19. Dr. Richard Clements Chattanooga State Technical Community College Modified by Charlotte Kirkpatrick. Key Concepts. Types, sources, and effects of water pollutants.

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Water pollution

Water Pollution

G. Tyler Miller’s

Living in the Environment

13th Edition

Chapter 19

Dr. Richard Clements

Chattanooga State Technical Community College

Modified by Charlotte Kirkpatrick


Key concepts

Key Concepts

  • Types, sources, and effects of water pollutants

  • Major pollution problems of surface water

  • Major pollution problems of groundwater

  • Reduction and prevention of water pollution

  • Drinking water quality


Types and sources of water pollution

Types and Sources of Water Pollution

Fig. 19-3 p. 485

  • Point sources

Refer to Tables 19-1 and 19-2 p. 484 and 485

  • Nonpoint sources

  • Biological oxygen demand

  • Water quality


Point and nonpoint sources

Point and Nonpoint Sources

NONPOINT SOURCES

Rural homes

Cropland

Urban streets

Animal feedlot

POINT SOURCES

Suburban development

Factory

Wastewater treatment plant

Fig. 19-4

p. 486


Pollution of streams

Pollution of Streams

  • Oxygen sag curve

  • Factors influencing recovery

Fig. 19-5 p. 488


Pollution of lakes

Pollution of Lakes

Fig. 19-7 p. 491

  • Eutrophication

  • Slow turnover

  • Thermal stratification


Pollution of lakes1

Pollution of Lakes

Fig. 19-7 p. 491


Case study the great lakes

Case Study: The Great Lakes

Fig. 19-8

p. 492


Groundwater pollution sources

Groundwater Pollution: Sources

  • Cold temperatures

  • Low flow rates

  • Few bacteria

Hazardous waste injection well

Pesticides

Coal strip mine runoff

De-icing road salt

Buried gasoline and solvent tank

Cesspool septic tank

Pumping well

Gasoline station

Waste lagoon

Water pumping well

Sewer

Landfill

Leakage from faulty casing

Accidental spills

Discharge

Unconfined freshwater aquifer

Confined aquifer

Fig. 19-10 p. 494

Confined freshwater aquifer

Groundwater flow


Groundwater pollution prevention

Groundwater Pollution Prevention

  • Monitoring aquifers

  • Leak detection systems

  • Strictly regulating hazardous waste disposal

  • Storing hazardous materials above ground


Ocean pollution

Ocean Pollution

Fig. 19-12 p. 498


Case study chesapeake bay

Case Study: Chesapeake Bay

Fig. 19-14 p. 500

  • Largest US estuary

  • Relatively shallow

  • Slow “flushing” action to Atlantic

  • Major problems with dissolved O2


Oil spills

Oil Spills

  • Sources: offshore wells, tankers, pipelines and storage tanks

  • Effects: death of organisms, loss of animal insulation and buoyancy, smothering

  • Significant economic impacts

  • Mechanical cleanup methods: skimmers and blotters

  • Chemical cleanup methods: coagulants and dispersing agents


Solutions preventing and reducing surface water pollution

Solutions: Preventing and Reducing Surface Water Pollution

Nonpoint Sources

Point Sources

  • Reduce runoff

  • Clean Water Act

  • Buffer zone vegetation

  • Water Quality Act

  • Reduce soil erosion


Technological approach septic systems

Technological Approach: Septic Systems

  • Require suitable soils and maintenance

Fig. 19-16 p. 504


Technological approach sewage treatment primary and secondary

Technological Approach: Sewage Treatment: Primary and Secondary

  • Mechanical and biological treatment

Fig. 19-17p. 504


Technological approach advanced sewage treatment

Technological Approach: Advanced Sewage Treatment

  • Removes specific pollutants

Fig. 19-18p. 505


Technological approach using wetlands to treat sewage

Technological Approach: Using Wetlands to Treat Sewage

Fig. 19-19p. 506


Drinking water quality

Drinking Water Quality

Fig. 19-11 p. 495

  • Bottled water

  • Safe Drinking Water Act

  • Maximum contaminant levels


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