Water Management

Objectives:

1. Define sustainable water use.

2. Contrast the benefits and drawbacks of dam and reservoir construction.

3. Relate some of the issues involving water rights in the Missouri River.

4. Describe the pros and cons of water diversion projects.

5. Describe two methods of desalinization.

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.

Water Management

Providing a Sustainable Water Supply

Dams and ReservoirsPros –• Ensure year-round water

supply• Hydropower• Recreation• Flood control

Water Management

Providing a Sustainable Water Supply

Dams and ReservoirsCons –• Alter ecosystems• Sediment Deposition• Interfere with fish

migration and spawning

Water Management

Providing a Sustainable Water Supply:

Dams and Reservoirs

Example:

Effect of Glen Canyon dam on the Colorado River in Grand Canyon

Water Management

Water Management

Columbia River

Water Management

Columbia River

Water Management

Missouri River

Water Management

Providing a Sustainable Water Supply

Water Diversion Projects

Water Management

Providing a Sustainable Water Supply

DesalinizationTwo methods:1) Distillation

Condenses

Simplified process:

Salt water

Pure water is collected

Water boiled

Produces steam

Water Management

Providing a Sustainable Water Supply

DesalinizationTwo methods:1) Distillation2) Reverse osmosis

Salt water

H2O

salt

Pressure Fresh water

Salt impermeable membrane