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Putah Creek-What's in it besides water?

Putah Creek Bioregion Project map http://wdsroot.ucdavis.edu/clients/pcbr/where/featmap.html

Contents:

South Davis storm drain outflows
Surface Runoff

The map below shows several areas in South Davis where stormwater run-off drains are located. Water which flows into these pipes goes directly to Putah Creek. It does not go to any water treatment facility.
Are the storm sewer outflows into Putah Creek the same size? What is the range of sizes you find in this area?

Surface Runoff

Natural/Farmed Surface

When rainwater hits this surface, where does the water go?
What substances besides water might it contain?

LUPIN map http://ceres.ca.gov/planning/counties/spatial/phtml

Paved Surface

When rainwater hits this surface, where does the water go?
What substances besides water might it contain?

LUPIN map http://ceres.ca.gov/planning/counties/spatial/phtml

Look at the two pictures above again. Which surface would produce a greater volume of runoff water?

Now look back at the map of South Davis. Can you give two reasons why the drains vary in size?

This page was created by Judy Fleenor and Martha Quenon. It was last updated on 17 July 1998.