This lesson teaches the concept of a watershed and why it is important in the context of engineering hydrology. Students learn about runoff and how we visualize runoff in the form of hydrographs.

At this site from the U.S. Geological Survey you can find out what makes rain such a valuable resource. Included is a chart that tells how much rain different cities in the United States receive. Click Home to access the site in Spanish.

[Free Registration/Login may be required to access all resource tools.] How pollution creates dead zones in the ocean.

[Free Registration/Login may be required to access all resource tools.] How pollution creates dead zones in the ocean.