1 / 16

Water Pollution

Learn about the different types of water pollution, including bacteria, viruses, and chemicals, and how they can be categorized as either point source or nonpoint source pollution. Discover the effects of each type on water quality and the measures that can be taken to control and prevent pollution.

arnolde
Download Presentation

Water Pollution

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Water Pollution Point Source vs. Nonpoint Source Pollution

  2. Water pollution • Bacteria,Viruses,Protozoa, Parasitic worms • Oxygen demanding substances • Inorganic plant nutrients • Organic chemicals • Sediment or suspended matter • Thermal pollution • Genetic pollution

  3. Water Quality Do (ppm) at 20˚C Good 8-9 Slightly polluted 6.7-8 Moderately polluted 4.5-6.7 Heavily polluted Below 4.5 Gravely polluted Below 4 How great is our water??? Dissolved Oxygen levels in water Pg. 535

  4. PointSource Pollution • comes from a specific source, like a pipe • factories, industry, municipal treatment plants • can be monitored and controlled by a permit system Basically, a source you can directly “point” to!

  5. Nonpoint Source Pollution • Nonpoint Source (NPS) Pollution is pollution associated with stormwater or runoff • NPS pollution cannot be traced to a direct discharge point such as a wastewater treatment facility When you can’t pinpoint any one particular source.

  6. Examples of NPS • oil & grease from cars • fertilizers • animal waste • grass clippings • septic systems • sewage & cleaners from boats • household cleaning products • litter

  7. “People Pollution”

  8. NONPOINT SOURCES Rural homes Cropland Urban streets Animal feedlot POINT SOURCES Suburban development Factory Wastewater treatment plant Point and Nonpoint Sources

  9. 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. 20-12

  10. Global Outlook: Stream Pollution in Developing Countries • Water in many of central China's rivers are greenish black from uncontrolled pollution by thousands of factories. Figure 20-7

  11. Case Study: India’s Ganges River: Religion, Poverty, and Health • Daily, more than 1 million Hindus in India bathe, drink from, or carry out religious ceremonies in the highly polluted Ganges River.

  12. Point Source or Nonpoint Source? Point Source

  13. Point Source or Nonpoint Source? Nonpoint Source

  14. Point Source or Nonpoint Source? • A factory dumping extremely hot water into a river? Point Source

  15. Point Source or Nonpoint Source? • Oil dripping from cars on a road and flowing into the storm drain. Nonpoint Source

  16. Roger Rosenblatt • It is a hard truth to swallow, but nature does not care if we live or die. We cannot survive without the oceans, for example, but they can do just fine without us.

More Related