End of Chapter “Main Points”

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Presentation transcript:

End of Chapter “Main Points”

Groundwater to Bottled Water 15 billion a year in U.S. Not regulated by the Gov’t FDA not EPA Plastic waste 1000-2000x greater energy cost than tap Transport (fossil fuels) Manufacturing of bottle

Flood Control Riverbanks are attractive paces to settle Live in a floodplain, face flooding Levees (or dikes) structures built to maintain channel size Levees can collapse/overflow

What causes major floods? Increased development Habitat loss Engineering Channelization Global climate change Natural conditions

West Virginia Floods ‘16 Steep mountains, narrow valleys and a deadly train of storms killed 23 people , evacuations, destroyed/damaged thousands of homes and businesses. WV got hit by a phenomenon meteorologists call 'training' because the thunderstorms line up over the same location like the cars of a freight train.

Dams and Diversions Diversions Dams Change the flow of a river to suit human needs Agriculture Residential use Brings water flow to drier areas Blocks river flow Reservoir- artificial lake for water storage Flood prevention, drinking water, irrigation, electricity Costs vs. Benefits

Solutions to Freshwater Depletion Desalination Agriculture Removing the salt from ocean water Reverse osmosis/ hrdrologic cycle mimic Expensive Lots of Energy Kills aquatic life at intakes Salt waste More efficient irrigation Low-pressure/ drip irrigation Minimizing runoff/ evap. Crop choice More suitable for land and climate

Solutions to Freshwater Depletion Lowering residential/industrial use Market-based strategies Make water a commodity (price reflects true cost) Get rid of Gov’t subsidies Water privatization Water disputes Water basins cross boundaries Conflicts over water Cooperation, treaties

Reading guide Q’s (Due Weds) Read about the treatment of drinking water and wastewater on pages 414 to 415. Read about water pollution issues on pages 408-409, and 412-413. 4. Describe how drinking water is treated. How does a septic system work? 5. Draw and explain the major step in the process of wastewater treatment. 1. Define point source and non-point source pollution 2. Why is groundwater pollution more persistent and difficult to address than surface water pollution? 3. What are the 6 major classes of water pollutants? Provide an example of each. Explain which class of water pollutants you think are most important in your local area.