1. Watersheds

2. What’s a Watershed? It's the area of land that catches rain and snow and drains or seeps into a marsh, stream, river, lake, ocean or groundwater.

3. What’s a Watershed? (cont) Area of land where all of the water that is under it or drains off of it goes into the same place. John Wesley Powell, scientist geographer, put it best when he said that a watershed is: –"that area of land, a bounded hydrologic system, within which all living things are inextricably linked by their common water course and where, as humans settled, simple logic demanded that they become part of a community."

4. Shifting Watershed Definitions Watersheds are not fixed areas –Depending on scale smaller watersheds may be combined and considered one larger watershed.

5. Watershed boundaries No matter what the scale, watershed boundaries are based on topography. http://govinfo.ucsd.edu/maps/border/new1.j pghttp://govinfo.ucsd.edu/maps/border/new1.j pg

6. San Diego Watersheds www.projectcleanwater.org

7. San Diego River Watershed http://www.projectcleanwater.org/html/ws_ san_diego_river.htmlhttp://www.projectcleanwater.org/html/ws_ san_diego_river.html

8. Website for rock cycle sugar activity http://www.nps.gov/brca/Geodetect/Rocks %20&%20Minerals/rock%20cycle.htmhttp://www.nps.gov/brca/Geodetect/Rocks %20&%20Minerals/rock%20cycle.htm