11-3 Water Pollution
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Transcript of 11-3 Water Pollution
11-3 Water Pollution
Page 284
A. Introduction
• 1. Water pollution is the introduction to chemical, physical or biological agents into water that degrade water quality.
B. Point-Source Pollution
• 1. one source of pollution.
B. Point-Source Pollution
• 2. Examples include factory or water treatment plant.
C. Nonpoint Source Pollution
• 1. Also known as runoff pollution.
C. Nonpoint Source Pollution
• 2. comes from many different sources; difficult to identify.
D. Wastewater
• 1. water containing waste from homes and/or industry.
D. Wastewater
• 2. needs to be treated by water treatment plants.
D. Wastewater
• 3. the solid material left behind is called sewage sludge which is burned and the ashes are buried in the landfill.
E. Artificial Eutrophication
• 1. Eutrophication= increase in the amount of nutrients.
E. Artificial Eutrophication
• 2. Artificial Eutrophication= increase in nutrients due to sewage or fertilizer runoff.
F. Thermal pollution
• 1. occurs when power plants and other industries use water in their cooling systems and release the warm water into lakes/rivers.
F. Thermal pollution
• 2. As a result, a significant amount of aquatic organisms die off; ecosystem is disrupted.
G. Groundwater Pollution
• 1. pollution in the surface water percolates (spreads) down into the soil and collects as groundwater.
H. Ocean Pollution
• 1. Ships may legally dump waste in some parts of the oceans.
H. Ocean Pollution
• 2. Oil spills cause major disruptions in ecosystems.
H. Ocean Pollution
• 3. Surprisingly, most oil pollution occurs from nonpoint sources on land.