1. Water Management • Objectives: • Define sustainable water use. • Contrast the benefits and drawbacks of dam and reservoir construction. • Relate some of the issues involving water rights in the Missouri River. • Describe the pros and cons of water diversion projects. • Describe two methods of desalinization.

2. Water Management • Providing a Sustainable Water Supply • Sustainable water use means to use water resources carefully so that ecosystems are not destroyed and water is available for future generations.

3. Water Management • Providing a Sustainable Water Supply • Dams and Reservoirs • Pros – • Ensure year-round water supply • Hydropower • Recreation • Flood control

4. Water Management • Providing a Sustainable Water Supply • Dams and Reservoirs • Cons – • Alter ecosystems • Sediment Deposition • Interfere with fish migration and spawning

5. Water Management Providing a Sustainable Water Supply: Dams and Reservoirs Example: Effect of Glen Canyon dam on the Colorado River in Grand Canyon

6. Water Management

7. Water Management • Columbia River

8. Water Management • Columbia River

9. Water Management • Missouri River

10. Water Management • Providing a Sustainable Water Supply • Water Diversion Projects

11. Water Management Condenses Simplified process: Produces steam Pure water is collected Water boiled Salt water • Providing a Sustainable Water Supply • Desalinization Two methods: 1) Distillation

12. Water Management Pressure salt H2O • Providing a Sustainable Water Supply • Desalinization Two methods: 1) Distillation 2) Reverse osmosis Salt impermeable membrane Salt water Fresh water