Define and discuss levees, dikes, and dams. Outline how each will effect the floodplain and the deposition of sediment and nutrients.
Illustrate how dams are built to restrict the flow if streams and rivers.
View photos of the world's largest dams and discuss the advantages and environmental problems caused by dams.
Outline reasons for the placement of dams.
Discuss fish ladders to alleviate the problem of fish not being able to migrate and spawn.
Present the history of aqueducts and how and why they are used today. Stress their importance in supplying water to places like N.Y. and L.A.
Discuss how human activities alter the growth and development of many rare species which would be located along river banks and lakes had it not been for interference.