Appendix 2. Create Your Own Watershed
A three-dimensional model of a watershed is one of the best ways to demonstrate the watershed concept to your students. With a three-dimensional model, you can demonstrate how water runs from peaks and ridges, to low points such as valleys, wetlands and other depressions. In addition, with the use of a few household kitchen items, such as cool-aid and cocoa you can demonstrate how pesticides and sediment are washed off the earth’s surface during rain events and into our lakes, rivers and oceans.
This activity can be done as a class, or in smaller groups. If small groups create their own watersheds, have the groups compare their results at the end.
To make a permanent model, use the above supplies, but substitute paper-mache material for the white trash bag. Once the paper-mache has dried thoroughly, paint the model with white water-proof paint. The model can now be re-used with numerous classes.
Copyright 2000. Great Swamp Watershed Association.