A Watershed Plan for Green Infrastructure (05 22-2014)

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Sustainable Site Development - A Watershed Approach to Green Infrastructure

"Water, water everywhere and not a drop to drink!" is the opening to this dynamic presentation focusing on solutions to Chicago's stormwater problem.

"Stormwater is the leading cause of water pollution in America," continues Tom Barrett, the presenter and owner of Green Water Infrastructure. This presentation focuses on developing sustainable solutions to water quality issues in the Chicago area.

Mr Barrett's approach utilizes a watershed and drainage basin study to stormwater mitigation. Developing a comprehensive stormwater plan, when correctly prioritized, combines existing grey infrastructure with new technologies developed in green infrastructure, creating cost effective solutions to our water quality issues. After an introduction about the problems stormwater creates, attendees will be given a walking tour of the grounds of the Center for Green Technology, and shown actual functional rain gardens and other sustainable solutions specifically mentioned in the presentation.

Guided by Mr. Barrett himself, attendees are encouraged to ask questions and recognize first-hand the visible results of sustainable solution planning, execution, and growth.

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A Watershed Plan for Green Infrastructure (05 22-2014)

  1. 1. A Watershed Approach to Stormwater By Tom Barrett Green Water Infrastructure, Inc. www.ThinkGWI.com Tom.Barrett@ThinkGWI.com Follow us on Twitter @TomBarrett_GWI © 2014 Tom Barrett
  2. 2. Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure
  3. 3. Green • Infrastructure The Future – incorporates the latest in scientific thinking It’s Clean – more complete filtration It’s Lean – less expensive It’s Green – more natural, mimicking nature
  4. 4. In nature there is no good or bad; there are only consequences.
  5. 5. Pre-Development Water Cycle
  6. 6. How Much Rain Falls in Chicago? January - 1.50" February - 1.23" March - 2.40" April - 3.21" May - 3.93" June - 5.06" July - 3.42" August - 3.77" September - 3.15" October - 2.44" November - 1.95" December - 1.55" Total 33.61" Image of Rain Falling
  7. 7. How Much Water Falls in Chicago? January - 2,338 gallons February - 1,917 March - 3,740 April - 5,003 May - 6,125 June - 7,886 July - 5,330 August - 5,875 September - 4,909 October - 3,803 November - 3,039 December - 2,431 Total 52,394 Image of Rain Falling 2,500 sq. ft. Roof
  8. 8. How Much Water Falls in Chicago? January - 10,183 gallons February - 8,350 March - 16,292 April - 21,791 May - 26,679 June - 34,350 July - 23,217 August - 25,593 September - 21,384 October - 16,564 November - 13,238 December - 10,590 Total 248,229 Image of Rain Falling ¼ Acre Residential Property
  9. 9. How Much Water Falls in Chicago? January - 11,880 gallons February - 11,065 March - 17,990 April - 24,982 May - 22,945 June - 24,642 July - 23,828 August - 31,363 September - 22,199 October - 18,397 November - 20,434 December - 16,496 Total 246,221 Image of Rain Falling ¼ Acre Residential Property
  10. 10. How Much Water Falls in Chicago? January - 142,560 gallons February - 132,784 March - 215,876 April - 299,783 May - 275,344 June - 295,710 July - 285,934 August - 376,358 September - 266,383 October - 220,764 November - 245,203 December - 197,954 Total 2,954,654 Image of Rain Falling 3 Acre Commercial Property
  11. 11. How Much Water Falls in Chicago? January - 475,195 gallons February - 442,610 March - 719,581 April - 999,267 May - 917,805 June - 985,690 July - 953,105 August - 1,254,515 September - 887,936 October - 735,873 November - 817,335 December - 659,842 Total 9,848,756 City Block (660’ x 660’ – 10 acres)
  12. 12. How Much Water is in Rain Event? ¼” Rain ½” Rain 1” Rain 2,500 ft. sq. Roof 390 gallons 779 gallons 1,558 gallons ¼ Acre Residential Property 1,697 3,994 67,789 3 Acre Commercial Property 20,366 40,731 135,770 Chicago City Block 67,885 135,770 271,540
  13. 13. How Much Water Falls Fairfield, Iowa? 1” Rainfall on 2,300 Acres = 62,454,200 gallons
  14. 14. How Much Water Falls in Jefferson County? 1” Rainfall on 437 Square Miles (279,680 acres) 7,594,430,720 Gallons (7.6 billion)
  15. 15. Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation
  16. 16. Stormwater Effects of Urbanization Change in Peak Runoff Flow Before and after Development 0% 50% 100% 150% 200% 250% 1 Year Storm 2 Year Storm 10 Year Storm 25 Year Storm 100 Year Storm
  17. 17. Peak Flow (2,500 sq. ft. Roof) Grass Field Roof 1 Year Storm 0.08 cfs 0.25 cfs 2 Year Storm 0.12 cfs 0.31 cfs 10 Year Storm 0.25 cfs 0.46 cfs 25 Year Storm 0.33 cfs 0.55 cfs 100 Year Storm 0.46 cfs 0.69 cfs cfs – cubic feet per second
  18. 18. Peak Flow (2,500 ft. sq. Roof) Grass Field Roof 1 Year Storm 36 gpm 111 gpm 2 Year Storm 54 gpm 139 gpm 10 Year Storm 111 gpm 206 gpm 25 Year Storm 147 gpm 245 gpm 100 Year Storm 206 gpm 309 gpm gpm – gallons per minute
  19. 19. Peak Flow (1 Acre Site) Grass Field Roof 1 Year Storm 1.4 cfs 4.3 cfs 2 Year Storm 2.1 cfs 5.4 cfs 10 Year Storm 4.3 cfs 8.0 cfs 25 Year Storm 5.7 cfs 9.5 cfs 100 Year Storm 8.0 cfs 12.0 cfs cfs – cubic feet per second
  20. 20. Peak Flow (1 Acre Site) Grass Field Roof 1 Year Storm 630 gpm 1,932 gpm 2 Year Storm 942 gpm 2,424 gpm 10 Year Storm 1,932 gpm 3,588 gpm 25 Year Storm 2,556 gpm 4,266 gpm 100 Year Storm 3,588 gpm 5,388 gpm gpm – gallons per minute
  21. 21. • Image of Rain Falling
  22. 22. Pesticide Issues • Atrazine, Nitrogen, Phosphorous
  23. 23. Atrizene
  24. 24. Low Impact Site Development
  25. 25. Stormwater Mitigation – Collection runoff near the source – Slow it down – Soak it in – Filter it – Apply it to the landscape – Create habitats
  26. 26. Green • Infrastructure The Future – incorporates the latest in scientific thinking It’s Clean – more complete filtration It’s Lean – less expensive It’s Green – more natural, mimicking nature
  27. 27. Watershed Approach Watershed Approach Watershed Approach Watershed Approach Watershed Approach
  28. 28. Windridge Ravine Comprehensive Drainage Study
  29. 29. • Site Inspection
  30. 30. 1. Evaluate the Watershed Basins
  31. 31. 2. Complete an on-site evaluation
  32. 32. 3. Identify problems
  33. 33. 4. Identify potential solutions
  34. 34. 7. Prioritize Solutions
  35. 35. Green • Infrastructure The Future – incorporates the latest in scientific thinking It’s Clean – more complete filtration It’s Lean – less expensive It’s Green – more natural, mimicking nature
  36. 36. It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change. - Charles Darwin

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