Rainwater Harvesting &
Condensate Recovery
 New Tools for Sustainable Site
        Development

                 By

     ...
Green • Water • Infrastructure

Green • Water • Infrastructure

Green • Water • Infrastructure

Green • Water • Infrastruc...
Untapped Reservoir
Untapped Reservoir
Untapped Reservoir

Untapped Reservoir

Untapped Reservoir
How Much Rain Falls in Chicago?

January     -    1.86"   Image of Rain Falling
February    -    1.58"
March       -    2....
Thirty Year Average
                                                       Monthly Rain Fall
                             ...
How Much Water Falls in Chicago?
                   2,500 sq. ft. Roof

January   - 2,727 gallons         Image of Rain Fa...
How Much Water Falls in Chicago?
                   ¼ Acre Residential Property

January     -    11,880 gallons        Im...
How Much Water Falls in Chicago?
                     3 Acre Commercial Property

January     -     142,560 gallons       ...
How Much Water Falls in Chicago?
                           City Block
                    (660’ x 660’ – 10 acres)
Januar...
How Much Water is in Rain Event?
                 ¼” Rain     ½” Rain       1” Rain
2,500 ft. sq.   390 gallons 779 gallon...
What can we do with this water?

•   Flush Toilets
•   Wash Vehicles
•   Clean Sidewalks
•   Laundry
•   Water the
    Lan...
How Much Do We Use?

                      Daily       Monthly         Annually
Toilet            -    19 gallons    570  ...
How Much Water Does a Landscape
        Need in Chicago?
January     -    0.00"
February    -    0.00"
March       -    0....
What is the Problem?
                    ET     Rain   Difference
January     -    0.00"    1.75"         1.75"
February  ...
Evapotranspiration
                                                      (Chicago)

               8


               7


...
Precipatation
                                                       (Chicago)

             8.0


             7.0


    ...
ET vs. Precipatation
                                                           (Chicgo)

                   8




       ...
Landscape Ecology

Size the landscape to the
80% of the average rain
water production.

– Roof Runoff

– Hardscape Runoff
...
Stormwater Mitigation
Stormwater Mitigation
Stormwater Mitigation

Stormwater Mitigation

Stormwater Mitigation
Stormwater Mitigation

– Collection runoff near the
  source

– Slow it down

– Soak it in

– Filter it

– Apply it to the...
Peak Flow
                   (1 Acre Site)

                          Grass Field           Roof
1 Year Storm             ...
Peak Flow
                  (1 Acre Site)

                         Grass Field         Roof
1 Year Storm               10...
Peak Flow
                  (1 Acre Site)

                         Grass Field          Roof
1 Year Storm               6...
Peak Flow
               (2,500 sq. ft. Roof)

                          Grass Field           Roof
1 Year Storm          ...
Peak Flow
               (2,500 sq. ft. Roof)

                         Grass Field         Roof
1 Year Storm             ...
Peak Flow
               (2,500 ft. sq. Roof)

                         Grass Field         Roof
1 Year Storm             ...
Change in Peak Runoff Flow
             Before and after Development

250%

200%

150%

100%

50%

 0%
1 Year Storm 2 Year...
Collection and Dispersal

Collection Systems

– Rain Barrels

– Downspout Collection

– Cisterns

Dispersal Systems

– Rai...
Rain Barrels
Rain Barrels
Rain Barrels

• Collect a small
  amount of water
  – 50 to 300 gallons

• Can be
  unattractive

• The water must be
  us...
Downspout Collectors
Downspout Collectors




Captures 90% of the rainwater
Cisterns




Above Ground
Cisterns




Below Ground
Putting It Together
Control Systems

Sensors plus Logic Circuits

Cistern Sensors

    • High Water
        – Disperse the water
        – Ala...
Drip Irrigation Systems




    90% Efficiency Rating
Expanding Stormwater Detention
   Systems into Stormwater Retention
Small increase in size        Image of Growing Plant
c...
Condensation
Untapped Reservoir
  Condensation

Untapped Reservoir

  Condensation
HVAC Condensation
• ½ gallon per hour per ton
  of air conditioning.

• 1,000 ton air conditioner
  produces 8 gallons of
...
HVAC Condensation
• ½ gallon per hour per ton
  of air conditioning.

• One ton of air conditioning
  for every 700 sq. ft...
Residential Condensation
• 8 to 15 gallons of water
  per day.

• 60 to 100 gallons per
  week.

• 250 to 450 gallons per
...
Commercial Condensation
• 15 gallons of water per
  minute.

• 360 gallons of water per
  day.

• 2,520 gallons of water p...
Green • Water • Infrastructure

Green • Water • Infrastructure

Green • Water • Infrastructure

Green • Water • Infrastruc...
Untapped Reservoir
Untapped Reservoir
Untapped Reservoir

Untapped Reservoir

Untapped Reservoir
Questions?
                   •   Green Water Infrastructure
                       • Strategic Planning
                 ...
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Rainwater Harvesting & Condesate Recovery(Presentation Format)

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Rainwater Harvesting and Condensate Recovery techniques are new tools critical to developing a sustainable environment.

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Rainwater Harvesting & Condesate Recovery(Presentation Format)

  1. 1. Rainwater Harvesting & Condensate Recovery New Tools for Sustainable Site Development By Tom Barrett May 2009
  2. 2. Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure
  3. 3. Untapped Reservoir Untapped Reservoir Untapped Reservoir Untapped Reservoir Untapped Reservoir
  4. 4. How Much Rain Falls in Chicago? January - 1.86" Image of Rain Falling February - 1.58" March - 2.59" April - 3.28" May - 3.75" June - 4.08" July - 3.39" August - 3.38" September - 2.91" October - 2.65" November - 2.09" December - 1.88" Total 33.44"
  5. 5. Thirty Year Average Monthly Rain Fall Chicago (1971 - 2000) 5.00 4.50 4.00 3.50 3.00 Inches 2.50 2.00 1.50 1.00 0.50 0.00 January February March April May June July August September October November December Month Graph of Chicago Rain Fall
  6. 6. How Much Water Falls in Chicago? 2,500 sq. ft. Roof January - 2,727 gallons Image of Rain Falling February - 2,540 March - 4,130 April - 5,735 May - 5,268 June - 5,657 July - 5,470 August - 7,200 September - 5,096 October - 4,223 November - 4,691 December - 3,787 Total 56,525
  7. 7. How Much Water Falls in Chicago? ¼ Acre Residential Property January - 11,880 gallons Image of Rain Falling 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
  8. 8. How Much Water Falls in Chicago? 3 Acre Commercial Property January - 142,560 gallons Image of Rain Falling 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
  9. 9. How Much Water Falls in Chicago? City Block (660’ x 660’ – 10 acres) 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
  10. 10. How Much Water is in Rain Event? ¼” Rain ½” Rain 1” Rain 2,500 ft. sq. 390 gallons 779 gallons 1,558 gallons Roof ¼ Acre 1,697 3,994 67,789 Residential Property 3 Acre 20,366 40,731 135,770 Commercial Property Chicago City 67,885 135,770 271,540 Block
  11. 11. What can we do with this water? • Flush Toilets • Wash Vehicles • Clean Sidewalks • Laundry • Water the Landscape
  12. 12. How Much Do We Use? Daily Monthly Annually Toilet - 19 gallons 570 6,840 Bathing - 15 450 5,400 Laundry - 8 240 2,880 Kitchen - 7 210 2,520 Housekeeping - 1 30 360 Total 50 1,500 18,000 The average household uses between 50 and 100 gallons of water per person per day.
  13. 13. How Much Water Does a Landscape Need in Chicago? January - 0.00" February - 0.00" March - 0.68" April - 2.01" May - 3.95" June - 5.89" July - 6.99" August - 6.07" September - 3.87" October - 2.08" November - 0.63" December - 0.00" Total 32.17"
  14. 14. What is the Problem? ET Rain Difference January - 0.00" 1.75" 1.75" February - 0.00" 1.63" 1.63" March - 0.68" 2.65" 1.97" April - 2.01" 3.68" 1.67" May - 3.95" 3.38" -0.57" June - 5.89" 3.63" -2.26" July - 6.99" 3.51" -3.48" August - 6.07" 4.62" -1.45" September - 3.87" 3.27" -0.60" October - 2.08" 2.71" 0.63" November - 0.63" 3.01" 2.38" December - 0.00" 2.43" 2.43" Total 32.17“ 36.27" 4.10"
  15. 15. Evapotranspiration (Chicago) 8 7 6 5 4 inches Evaportation 3 2 1 0 t ril y r er ly ne r ch ay y r us be be ar be ar Ju ob Ap M Ju ar ug nu em u em em M ct br -1 A Ja v ec O pt Fe No Se D Month Graph of Chicago Evapotranspiration
  16. 16. Precipatation (Chicago) 8.0 7.0 6.0 5.0 inches 4.0 Rain Fall 3.0 2.0 1.0 0.0 st ril y r er ly ne r ch ay ry r be be ar be gu Ju ob Ap ua M Ju ar nu m m em Au M ct br ve ce Ja O pt Fe No De Se Month Graph of Chicago Rain Fall & Evapotranspiration
  17. 17. ET vs. Precipatation (Chicgo) 8 6 4 2 Rain Fall inches Evaportation Difference 0 t il ry r r ly e r ch ay ry r us be be be be pr n Ju a ua M Ju ar ug A nu o em em m M ct br A te Ja ov ec O Fe ep -2 N D S -4 -6 Month Graph of Chicago Rain Fall & Evapotranspiration
  18. 18. Landscape Ecology Size the landscape to the 80% of the average rain water production. – Roof Runoff – Hardscape Runoff Balancing rain water to landscape creates a functional landscape that utilizes the site’s water production.
  19. 19. Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation Stormwater Mitigation
  20. 20. Stormwater Mitigation – Collection runoff near the source – Slow it down – Soak it in – Filter it – Apply it to the landscape – Create habitats
  21. 21. 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
  22. 22. Peak Flow (1 Acre Site) Grass Field Roof 1 Year Storm 10.5 gps 32.2 gps 2 Year Storm 15.7 gps 40.4 gps 10 Year Storm 32.2 gps 59.8 gps 25 Year Storm 42.6 gps 71.1 gps 100 Year Storm 59.8 gps 89.8 gps gps – gallons per second
  23. 23. 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
  24. 24. 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
  25. 25. Peak Flow (2,500 sq. ft. Roof) Grass Field Roof 1 Year Storm 0.60 gps 1.85 gps 2 Year Storm 0.90 gps 2.32 gps 10 Year Storm 1.85 gps 3.43 gps 25 Year Storm 2.44 gps 4.08 gps 100 Year Storm 3.43 gps 5.15 gps gps – gallons per second
  26. 26. 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
  27. 27. Change in Peak Runoff Flow Before and after Development 250% 200% 150% 100% 50% 0% 1 Year Storm 2 Year Storm 10 Year 25 Year 100 Year Storm Storm Storm Stormwater Effects of Urbanization
  28. 28. Collection and Dispersal Collection Systems – Rain Barrels – Downspout Collection – Cisterns Dispersal Systems – Rain Gardens – Bioswales – Irrigation
  29. 29. Rain Barrels
  30. 30. Rain Barrels
  31. 31. Rain Barrels • Collect a small amount of water – 50 to 300 gallons • Can be unattractive • The water must be used
  32. 32. Downspout Collectors
  33. 33. Downspout Collectors Captures 90% of the rainwater
  34. 34. Cisterns Above Ground
  35. 35. Cisterns Below Ground
  36. 36. Putting It Together
  37. 37. Control Systems Sensors plus Logic Circuits Cistern Sensors • High Water – Disperse the water – Alarm • Irrigation Water – Reserve for landscape • Household Water – Minimum if household water use • Low Water l – Pump protection Irrigation System • Soil moisture
  38. 38. Drip Irrigation Systems 90% Efficiency Rating
  39. 39. Expanding Stormwater Detention Systems into Stormwater Retention Small increase in size Image of Growing Plant creates a large increase in volume. Small increase in cost delivers a large volume of water. Mitigates the ¼” to ½” rainfall events.
  40. 40. Condensation Untapped Reservoir Condensation Untapped Reservoir Condensation
  41. 41. HVAC Condensation • ½ gallon per hour per ton of air conditioning. • 1,000 ton air conditioner produces 8 gallons of water per minute. • Condensation production occurs when the landscape needs the water.
  42. 42. HVAC Condensation • ½ gallon per hour per ton of air conditioning. • One ton of air conditioning for every 700 sq. ft. of floor space. • One ton of air conditioning for every 5,600 cu. ft. of building volume.
  43. 43. Residential Condensation • 8 to 15 gallons of water per day. • 60 to 100 gallons per week. • 250 to 450 gallons per month.
  44. 44. Commercial Condensation • 15 gallons of water per minute. • 360 gallons of water per day. • 2,520 gallons of water per week. • 10,000 gallons of water a month.
  45. 45. Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure Green • Water • Infrastructure
  46. 46. Untapped Reservoir Untapped Reservoir Untapped Reservoir Untapped Reservoir Untapped Reservoir
  47. 47. Questions? • Green Water Infrastructure • Strategic Planning • Marketing • Training Tom Barrett 104 Ash Circle Noblesville, Indiana 46062 (317) 773-3111 (317) 441-8703 cell Tom.Barrett@JTBarrett.com

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