The Dirty Truth About Water (02 10-2014)
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The Dirty Truth About Water By Tom Barrett Green Water Infrastructure, Inc. www.ThinkGWI.com [email protected] Follow us on Twitter @TomBarrett_GWI © 2014 Tom Barrett
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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.
Transcript of The Dirty Truth About Water (02 10-2014)
The Dirty
Truth
About
WaterBy Tom Barrett Green Water Infrastructure, [email protected]
Follow us on Twitter @TomBarrett_GWI
© 2014 Tom Barrett
Green • Water • Infrastructure
Green • Water • Infrastructure
Green • Water • Infrastructure
Green • Water • Infrastructure
Green • Water • Infrastructure
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
In nature there is no good
or bad;
there are only
consequences.
Pre-Development Water Cycle
How Much Rain Falls in Fairfield?
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
How Much Water Falls in Fairfield?
January - 2,338 gallonsFebruary - 1,917March - 3,740April - 5,003May - 6,125June - 7,886July - 5,330August - 5,875September- 4,909October - 3,803November - 3,039December - 2,431Total 52,394
Image of Rain Falling
2,500 sq. ft. Roof
How Much Water Falls in Fairfield?
January - 10,183 gallonsFebruary - 8,350March - 16,292April - 21,791May - 26,679June - 34,350July - 23,217August - 25,593September - 21,384 October - 16,564November - 13,238December - 10,590Total 248,229
Image of Rain Falling
¼ Acre Residential Property
How Much Water Falls in Fairfield?
January - 122,193 gallonsFebruary - 100,198March - 195,509April - 261,493May - 320,146June - 412,198July - 278,600August - 307,112September - 256,605October - 198,767November - 158,851December - 127,081Total 2,738,752
Image of Rain Falling
3 Acre Commercial Property
How Much Water Falls in Fairfield?
January - 203,655 gallonsFebruary - 166,997March - 325,848April - 435,822May - 533,576June - 686,996July - 464,333August - 511,853September - 427,676 October - 331,279November - 264,752December - 211,801Total 4,564,587
City Block (330’ x 330’ – 5 acres)
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 6,788
3 Acre Commercial Property
20,366 40,731 81,462
Fairfield City Block
33,942 67,885 135,770
How Much Water Falls Fairfield, Iowa?
1” Rainfall on 2,300 Acres = 62,454,200 gallons
How Much Water Falls in Jefferson County?
1” Rainfall on 437 Square Miles (279,680 acres)
7,594,430,720 Gallons (7.6 billion)
Stormwater Mitigation
Stormwater Mitigation
Stormwater Mitigation
Stormwater Mitigation
Stormwater Mitigation
Stormwater Effects of Urbanization
Change in Peak Runoff FlowBefore and after Development
0%
50%
100%
150%
200%
250%
1 Year Storm 2 Year Storm 10 YearStorm
25 YearStorm
100 YearStorm
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
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
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
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
• Image of Rain Falling
Pesticide Issues
• Atrazine, Nitrogen, Phosphorous
Atrizene
Low Impact Site Development
Stormwater Mitigation
– Collection runoff near the source
– Slow it down
– Soak it in
– Filter it
– Apply it to the landscape
– Create habitats
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
Watershed Approach
Watershed Approach
Watershed Approach
Watershed Approach
Watershed Approach
Windridge RavineComprehensive Drainage Study
• Site Inspection
1. Evaluate the Watershed Basins
2. Complete an on-site evaluation
3. Identify problems
4. Identify potential solutions
7. Prioritize Solutions
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
It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change.
- Charles Darwin
