Bioretention OverviewSustainability for all the places between the buildings.                                             ...
Rain Gardens• Planted, bowl‐shaped area designed to collect and  absorb runoff and reduce polllutants.                    ...
Rain Gardens               3
Rain Gardens               4
Rain Gardens               5
Stormwater Planters• Structural container with soil and plants built to collect  and slow runoff and reduce pollutants.   ...
Stormwater Planters                      7
Stormwater Planters                                    Courtesy of Ken Cook of FlickrCourtesy of Davidsilver of Flickr    ...
Swales (aka Bioswales)• Long, planted, open channel that carries, slows and  absorbs stormwater and filters out pollutants...
Swales (aka Bioswales)                     10
Swales     11
Swales (aka Bioswales)                     12
When is a swale really a rain garden?• When water ponds in the facility instead of flowing  through it:                   ...
When is a swale really a rain garden?                                    14
Green Streets can be Swales                          15
Vegetated Filter Strip                     16
Vegetated Filter Strips                      17
Vegetated Filter Strips                      18
Vegetated Filter Strips                      19
Green Streets can be Rain Gardens• Street designed to capture, absorb and filter runoff using  rain gardens, planters, swa...
Green Streets can be Planters and Tree Canopy                                            21
Green Streets can be Porous Pavement                                   22
X” rainfall                                   yearly avg           0.005% runoff                           40% evaporation...
X” rainfall                                                  yearly avg      Reduced       reduced evapo-     infiltration...
Water Quality BeforeSome sediment                                   25
Water Quality After                 Sediment (air particulates)                        Nutrients                          ...
Sediment/turbidity?              Hydrocarbons     Heavy metals (particles & solubl             Other chemicals            ...
Hey! What about detention ponds?          They look pretty green?                                28
Detention ponds are not LID or… why you must  reduce runoff volume to restore water quality                               ...
Detention pondsare not low impact development                             30
Detention pondsare not low impact development                             31
Detention pondsare not low impact development                             32
Detention pondsare not low impact development                             33
Detention pondsare not low impact development                             34
Detention pondsare not low impact development                             35
Detention pondsare not low impact development                             36
Detention pondsare not low impact development                             37
Detention pondsare not low impact development                             38
Runoff Volume & Durationfrom a Watershed Perspective                           39
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Bioretention1 overview

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

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Bioretention1 overview

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

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