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Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
Bioretention1 overview
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Bioretention1 overview

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Learn about the different kinds of bioretention and how water quality varies among them.

Learn about the different kinds of bioretention and how water quality varies among them.

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Transcript

  • 1. Bioretention OverviewSustainability for all the places between the buildings. 1
  • 2. Rain Gardens• Planted, bowl‐shaped area designed to collect and absorb runoff and reduce polllutants. 2
  • 3. Rain Gardens 3
  • 4. Rain Gardens 4
  • 5. Rain Gardens 5
  • 6. Stormwater Planters• Structural container with soil and plants built to collect and slow runoff and reduce pollutants. 6
  • 7. Stormwater Planters 7
  • 8. Stormwater Planters Courtesy of Ken Cook of FlickrCourtesy of Davidsilver of Flickr 8
  • 9. Swales (aka Bioswales)• Long, planted, open channel that carries, slows and absorbs stormwater and filters out pollutants. 9
  • 10. Swales (aka Bioswales) 10
  • 11. Swales 11
  • 12. Swales (aka Bioswales) 12
  • 13. When is a swale really a rain garden?• When water ponds in the facility instead of flowing through it: 13
  • 14. When is a swale really a rain garden? 14
  • 15. Green Streets can be Swales 15
  • 16. Vegetated Filter Strip 16
  • 17. Vegetated Filter Strips 17
  • 18. Vegetated Filter Strips 18
  • 19. Vegetated Filter Strips 19
  • 20. Green Streets can be Rain Gardens• Street designed to capture, absorb and filter runoff using rain gardens, planters, swales, porous pavement, tree canopy and other methods. 20
  • 21. Green Streets can be Planters and Tree Canopy 21
  • 22. Green Streets can be Porous Pavement 22
  • 23. X” rainfall yearly avg 0.005% runoff 40% evaporation 35% groundwater (deep infiltration) The Water Balance Model Water Quantity Before23
  • 24. X” rainfall yearly avg Reduced reduced evapo- infiltration ration 98% runoff infiltration No 2% evaporation The Water Balance Model Water Quantity After24
  • 25. Water Quality BeforeSome sediment 25
  • 26. Water Quality After Sediment (air particulates) Nutrients Feces Other debris Runoff volumes Sediment/turbidity HydrocarbonsHeavy metals (particles & soluble) Other chemicals Runoff volume Sediment/turbidity fertilizers pesticides herbicides Runoff volume 26
  • 27. Sediment/turbidity? Hydrocarbons Heavy metals (particles & solubl Other chemicals Runoff volume Bioretention Water Quality &27
  • 28. Hey! What about detention ponds? They look pretty green? 28
  • 29. Detention ponds are not LID or… why you must reduce runoff volume to restore water quality 29
  • 30. Detention pondsare not low impact development 30
  • 31. Detention pondsare not low impact development 31
  • 32. Detention pondsare not low impact development 32
  • 33. Detention pondsare not low impact development 33
  • 34. Detention pondsare not low impact development 34
  • 35. Detention pondsare not low impact development 35
  • 36. Detention pondsare not low impact development 36
  • 37. Detention pondsare not low impact development 37
  • 38. Detention pondsare not low impact development 38
  • 39. Runoff Volume & Durationfrom a Watershed Perspective 39

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