Instructions; Use the photocopied enlargements of the topographic maps of the Lake Harwinton and Lake Garda areas to map the watersheds of those lakes.

1. First color the waterways on the photocopies with a different color using the actual topo sheets for comparison. Mark the outlet of each lake - none of the land downstream from the outlets can be in the watershed. Then follow these instructions to map the watersheds of the lakes.

2. Start with each stream entering the lakes and follow them uphill. Go past the beginning of  the stream until the land begins to go downhill, then mark the map in that area as a portion of the watershed divide.

3. In between the inlets to the lakes, begin at the shore of the lake, go uphill from the lake until you reach hilltops, then mark the hilltops.

4. Connect the marks at the high spots until the lake is completely surrounded.

5. Check it by picking a spot on the divide line and go downhill toward the lake - route should not go uphill anywhere.

6. Now use a dotted line to show the watershed of an inlet stream or wetland inside of the lake watershed.

7. Using information on the maps, and your own knowledge, describe; (1) how the land is used by people in the watersheds, (2) how those uses affect the lake.

8. Describe the natural features such as wetlands in the watersheds and how those features affect the lake water quality and flow rates.

Homework:1. Finish this exercise 2. Read and do questions p228-230,234. 3. Identify the smallest body of water that receives water from your yard, and describe where the water goes from there to the Atlantic Ocean. 4. Describe two ways that what you do on your yard affects those water systems.