Page 42: Flood Control

Furious Floods
Visit this site to learn more about why floods occur and what can be done to control floods. This site consists of five pages of information on floods, natural flood control, and flood prevention. Scroll down and click on page 4 to read about wetlands. What role do wetlands play in flood control?

Wetlands: Flood Control
Wetlands Values and Functions - Go to this swiss site to learn about floods as natural, ecological processes and how wetlands help predict floods. Why can’t a dam replace a wetland as a flood control measure?

NOVA Online: Flood!
At this site you can learn more about floods and their effects. Click on dealing with the deluge to read about flooding in China, Egypt, and the United States. Why is China’s Yellow River called "China’s Sorrow?"

Page 45: Human-made Reservoirs

Lakes, Ponds, and Reservoirs
Go to this site by the U.S. Environmental Protection Agency (EPA) to learn about the differences between lakes, ponds, and man-made reservoirs. Scroll down to read about reservoirs. What do reservoirs provide to the surrounding communities?

Select by State – Dams
Visit this site by the U.S. Bureau of Reclamation to learn all about dams in the western United States and their associated reservoirs. Click on any western state to see a map of the state labeled with the dams found in that state. Then click on a dam name to learn more about that dam and its reservoir. For example, you can click on the state of Nevada, then on Hoover Dam to find out the name of the reservoir impounded by the dam. What is the purpose of Hoover Dam? What is the purpose of its reservoir?

Page 61: The Great Lakes

Great Lakes
Go to this EPA site to learn more about the environment of the Great Lakes. Click on Visualizing the Lakes for a list of resources, then click on Visualizing the Lakes again to see a collection of photographs of the lakes and their problems. Scroll down and click on exotic species to see photos of zebra mussels.

Great Lakes Information Network
Visit this site to find out more about the environment and economy of the Great Lakes. Click on environment to see a list of the Great Lakes environmental topics you can explore here. Go to the list at the left of the screen and click on invasive species. What other invasive species besides zebra mussels are causing problems in the Great Lakes?

Water Levels of the Great Lakes
At this site by the Great Lakes Environmental Research Laboratory you can find out why the water levels of the Great Lakes fluctuate. Why are water levels in the Great Lakes so low right now?