Your SlideShare is downloading. ×
0
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Challenging Sites Overview, Part 2
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Challenging Sites Overview, Part 2

574

Published on

This PowerPoint describes each best practice, description of challenging sites, conveyances and flows, permitting, O&M

This PowerPoint describes each best practice, description of challenging sites, conveyances and flows, permitting, O&M

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
574
On Slideshare
0
From Embeds
0
Number of Embeds
3
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Stormwater Practices for Challenging Sites Sustainability for all the places between the buildings cell 503.334.8634 www.greengirlpdx.com greengirl@greengirlpdx.com a certified women business enterprise
  • 2. What I’m About to Tell You How Residents Can Safely Manage Stormwater •Housekeeping •What’s a “Challenging Site”? •Why do our properties impact water quality? •Why is reducing runoff important? •What practices can we implement on our own properties?
  • 3. About Me
  • 4. About You
  • 5. Challenging Sites are… … any area not suitable for infiltration of runoff. This includes: • Steep slopes/landslides • Clay soils • High seasonal groundwater • Inadequate setbacks (ex. Buildings too close together)
  • 6. The Water Balance Model Water Quantity Before 25% baseflow (infiltration) 50% evaporation 0.5% runoff 100%average Annualrainfall 25%groundwater (infiltration)
  • 7. Water Balance BEFORE Development Simplified
  • 8. The Water Balance Model Water Quantity After 0” baseflow (infiltration) reducedevapo- transpiration 100%rainfall yearlyavg 98% runoff 2%evapo- transpiration Reduced infiltration
  • 9. Water Balance AFTER Development Example: EVERYWHERE
  • 10. “Before” & “After” Runoff Compared 0.5% runoff 98% runoff
  • 11. Runoff: A Watershed Perspective in the West Hills • Flooding, landslides and stream bank erosion
  • 12. The Water Balance Model Water Quality Before Some sediment
  • 13. The Water Balance Model Water Quality After Sediment (air particulates) Nutrients Feces Other debris Sediment/turbidity Hydrocarbons Heavy metals (particles & soluble) Other chemicals Runoff volume Sediment/turbidity fertilizers pesticides herbicides Runoff volume 13
  • 14. Restore the Soil: Lawn Areas Runoff prevented = 50%
  • 15. Restore the Soil: Perennial Garden Areas Runoff prevented = 80%
  • 16. Restore the Soil: Meadows Runoff prevented = 65%
  • 17. Compost Amended Slopes Washington DOT • Great for keeping soil in place on steep slopes, too! http://www.wsdot.wa.gov/Design/Roadside/SoilBioengineering.htm
  • 18. Lots of great information at soilsforsalmon.org
  • 19. Contained Planters (Over Hardscapes)
  • 20. Contained Planters (Over Impervious Area) Runoff prevented = 50%
  • 21. Minimize Impervious Pavement Depaving Runoff prevented varies depending on what replaces the pavement, lawn or perennial garden.
  • 22. Lots of great information at depave.org
  • 23. Tree Planting
  • 24. Porous Walkway & Patio Surface Types Homemade paversGrass-crete Flexible Pavements (GrassPave ) Commercial pavers Boardwalks/decksWood chips (pedestrian only) Gravel
  • 25. Typical Permeable Paver Section
  • 26. Porous Walkways Runoff prevented = 90%
  • 27. Ecoroof/Green Roofs? • DIY Projects = areas where a single ply of impermeable lining can be used or where failure isn’t too problematic
  • 28. Ecoroof/Green Roof Runoff prevented = 50%
  • 29. Conveyances & Flows
  • 30. Issues to look for • Drainage problems, like water pooling in your yard. • Bare spots
  • 31. Issues to look for • Erosion: Stream banks
  • 32. Issues to look for • Erosion: Garden areas
  • 33. Historic Landslide Areas One way to identify them • Erosion: Landslides Bent trunks sometimes indicate areas where landslides occurred a long time ago = likely to happen again
  • 34. Permitting
  • 35. Operations & Maintenance
  • 36. What I Just Told You How Residents Can Safely Manage Stormwater •Housekeeping •What’s a “Challenging Site”? •Why do our properties impact water quality? •Why is reducing runoff important? •What practices can we implement on our own properties?
  • 37. Thank You!
  • 38. Rain Barrels
  • 39. Rain Barrels: Food for Thought
  • 40. Rain Barrels: Landscape
  • 41. Rainwater Harvesting: L andscapes A Watershed Perspective
  • 42. Rainwater Harvesting: Indoor Uses

×