1. Impacts of Land Development on Oregon’s Waters 2001

2. Impacts Understanding the problem Impacts of Land Development on Water Quality

3. Impacts Prevention is possible

4. Impacts In the news

5. Impacts Evidence of damage

6. Impacts Loss of opportunities Declining fish populations Closed shellfish beds Limits to recreation Harder to maintain channels

7. Looking at the whole watershed Forestry Urban development Agriculture Septic systems

8. Impacts How does development pollute?

9. Impacts Land development can cause… Polluted water Loss of fish and wildlife habitat Altered water flows

10. Impacts Types of water pollution Point source – Industrial outflow Non-point source – “Polluted runoff” – “Diffuse pollution” – “Runoff pollution”

11. Impacts Oil & grease contamination Heavy metal contamination Chemical components of pollution Pesticide & herbicide contamination Increased harmful bacteria Increased nutrients Increased oxygen demanding materials

12. Impacts Physical components of pollution Increased sediment input Increased temperatures

13. Impacts Stormwater hotspots A land use or activity that produces higher concentrations of trace metals, hydrocarbons or priority pollutants than normally found in urban runoff.

14. Impacts Impaired or destroyed fish and wildlife habitat Changes in species diversity and abundance Changes in physical structures Photo Copyright Oregon Sea Grant 1999

15. Impacts Aquatic habitat: “Properly Functioning Conditions” Temperature in natural range Enough dissolved oxygen Clear enough to see food and breathe Clean enough for food web to function Clean and complex enough for spawning and rearing habitat

16. Impacts Altered water flows Increased flood peaks More frequent flooding Lower dry weather flow Loss of stream complexity

17. Center for Watershed Protection, Copyright 1999 Water balance

18. Impacts Flooding and urban development

19. Impacts Impervious surface cover as an indicator – Rooftops – Transport Systems Parking lots Streets Sidewalks Driveways Cul de sacs

20. Impacts Natural ground cover Photo Copyright 1999, Center for Watershed Protection

21. Impacts 10% impervious surface cover Photo Copyright 1999, Center for Watershed Protection

22. Impacts 30% impervious surface cover Photo Copyright 1999, Center for Watershed Protection

23. Impacts Over 35 % impervious surface cover Photo Copyright 1999, Center for Watershed Protection

24. Impacts Where do we stand? Local impervious surface cover Local building trends Pollution problems Habitat loss

25. Impacts Prevention works: taking action locally Limit impervious surface across the watershed Treat stormwater Restrict high risk activities in sensitive areas Create buffers around streams, wetlands, and shore lands Encourage tree preservation and native vegetation University of Connecticut, NEMO