The Dirty Truth About Water (02 10-2014)

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Green infrastructure combines existing gray infrastructure with new green infrastructure, old technology with new technology, taking on a natural approach to mitigating stormwater.

Green Infrastructure is...
It’s Green – more natural, mimicking nature
It’s Clean – more complete filtration
It’s Lean – less expensive
The Future – incorporates the latest in scientific thinking

This presentation illustrates how by taking a watershed approach to stormwater mitigation will save money and create a sustainable environment.

Published in: Design
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The Dirty Truth About Water (02 10-2014)

  1. 1. The Dirty Truth About Water 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 It’s Green – more natural, mimicking nature It’s Clean – more complete filtration It’s Lean – less expensive The Future – incorporates the latest in scientific thinking
  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 Fairfield? January February March April May June July August September October November December Total - 1.50" - 1.23" - 2.40" - 3.21" - 3.93" - 5.06" - 3.42" - 3.77" - 3.15" - 2.44" - 1.95" - 1.55" 33.61" Image of Rain Falling
  7. 7. How Much Water Falls in Fairfield? 2,500 sq. ft. Roof 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
  8. 8. How Much Water Falls in Fairfield? ¼ Acre Residential Property January February March April May June July August September October November December Total - 10,183 gallons 8,350 16,292 21,791 26,679 34,350 23,217 25,593 21,384 16,564 13,238 10,590 248,229 Image of Rain Falling
  9. 9. How Much Water Falls in Fairfield? 3 Acre Commercial Property January February March April May June July August September October November December Total - 122,193 gallons 100,198 195,509 261,493 320,146 412,198 278,600 307,112 256,605 198,767 158,851 127,081 2,738,752 Image of Rain Falling
  10. 10. How Much Water Falls in Fairfield? City Block (330’ x 330’ –5acres) January February March April May June July August September October November December Total - 203,655 gallons 166,997 325,848 435,822 533,576 686,996 464,333 511,853 427,676 331,279 264,752 211,801 4,564,587
  11. 11. How Much Water is in Rain Event? ¼” Rain 2,500 ft. sq. Roof ½” Rain 390 gallons 779 gallons 1” Rain 1,558 gallons ¼ Acre Residential Property 1,697 3,994 6,788 3 Acre Commercial Property 20,366 40,731 81,462 Fairfield City Block 33,942 67,885 135,770
  12. 12. How Much Water Falls Fairfield, Iowa? 1” Rainfall on 2,300 Acres = 62,454,200gallons
  13. 13. How Much Water Falls in Jefferson County? 1” Rainfall on 437 Square Miles (279,680 acres) 7,594,430,720Gallons (7.6 billion)
  14. 14. Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation
  15. 15. Change in Peak Runoff Flow Before and after Development 250% 200% 150% 100% 50% 0% 1 Year Storm 2 Year Storm 10 Year Storm 25 Year Storm 100 Year Storm Stormwater Effects of Urbanization
  16. 16. 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 25 Year Storm 0.25 cfs 0.33 cfs 0.46 cfs 0.55 cfs 100 Year Storm 0.46 cfs 0.69 cfs cfs – cubic feet per second
  17. 17. 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
  18. 18. 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 25 Year Storm 4.3 cfs 5.7 cfs 8.0 cfs 9.5 cfs 100 Year Storm 8.0 cfs 12.0 cfs cfs – cubic feet per second
  19. 19. 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
  20. 20. • Image of Rain Falling
  21. 21. • Atrazine, Nitrogen, Phosphorous Pesticide Issues
  22. 22. Atrizene
  23. 23. Low Impact Site Development
  24. 24. Stormwater Mitigation – Collection runoff near the source – Slow it down – Soak it in – Filter it – Apply it to the landscape – Create habitats
  25. 25. Green• Infrastructure It’s Green – more natural, mimicking nature It’s Clean – more complete filtration It’s Lean – less expensive The Future – incorporates the latest in scientific thinking
  26. 26. Watershed Approach Watershed Approach Watershed Approach Watershed Approach Watershed Approach
  27. 27. Windridge Ravine Comprehensive Drainage Study
  28. 28. • Site Inspection
  29. 29. 1. Evaluate the Watershed Basins
  30. 30. 2. Complete an on-site evaluation
  31. 31. 3. Identify problems
  32. 32. 4. Identify potential solutions
  33. 33. 7. Prioritize Solutions
  34. 34. Green• Infrastructure It’s Green – more natural, mimicking nature It’s Clean – more complete filtration It’s Lean – less expensive The Future – incorporates the latest in scientific thinking
  35. 35. 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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