1. Human Impacts on the Hydrosphere

2. Een2.4 Evaluate How Humans Use Water
2.4.1 Evaluate human influences on freshwater availability
I can understand how humans use water and the consequences of population growth, misuse and pollution of water
I will be able to list and describe how humans use water, what the effects of overuse are, and the consequences for present and future populations

3. EEn2.4 Evaluate How Humans Use Water
2.4.2 Evaluate human influences on water quality in North Carolina’s river basins, wetlands, and tidal environments
I can understand the role of saltwater and wetlands in aquatic systems
I will understand that water is described in terms of both quantity and quality
I will be able to describe common sources and types of water pollutants and their impact on surface and groundwater resources

4. How Do You Use Water?

5. How Humans Use Water Wells Dams and dam removal Aquifer depletion
Agriculture
Recreation

6. Misuse of Water Over pumping wells
Subsidence – when land over an aquifer sinks due to decrease of water
Pollution
Mismanagement

7. Water Pollution Sewage Industrial waste Landfills
Usually from faulty septic tanks
Industrial waste
Usually occur in ions and molecules that are not easy to filter out
Arsenic is an example
Landfills
Agricultural chemicals
ONCE POLLUTANTS GET INTO THE WATER IT IS VERY DIFFICULT TO GET THEM OUT!!!!!

8. Naturally Occurring Pollutants
SALT – big issue in coastal areas
Freshwater layer is on top of ocean water because salty water is more dense that fresh water
When wells in these areas are over pumped, it pulls salt water in to the freshwater layer and contaminates the wells
RADON – naturally occurring radioactive gas
Leading cause of cancer in the United States
Comes from decaying uranium (granite, shale)
Found in small amounts in all groundwater

9. Protecting Water Identify and stop the sources of pollution
Monitor and try to contain known sources of pollution
Create awareness about water pollution and its effects

10. How Would You Fix… Accidental spills from vehicles
Leaks from storage tanks
Seepage from acid mine drainage
Saltwater intrusion into aquifers near shorelines
Leaks from waste disposal sites