Presented to West Dakota Water Development District December 11, - - PowerPoint PPT Presentation

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Presented to West Dakota Water Development District December 11, - - PowerPoint PPT Presentation

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Presented to West Dakota Water Development District December 11, 2017 By: Jason Phillips, MS (CE) (sustainable solutions research & green technologies) 1 Why Green Roofs? The Need For Research Research Objectives Benefits

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Presented to West Dakota Water Development District December 11, 2017 By: Jason Phillips, MS (CE)

(sustainable solutions research & green technologies)

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 Why Green Roofs?  The Need For Research  Research Objectives  Benefits  How Much Will It Cost?

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Port of Portland Airport (Mayer Reed)

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 Airports consume a large land mass with

high percentages of impervious surfaces

 Airport environmental impacts:

  • S

tormwater runoff

  • Water pollution
  • Urban heat islands
  • Noise pollution
  • Air pollution
  • Ecosystem destruction

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Rapid City Regional Airport (Esri)

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Vermont Burlington Airport FedEx O’ Hare Airport, IL Vancouver Airport, BC Port of Portland Airport, OR King County Airport, WA Midway Airport, IL

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 Reduce stormwater runoff:

  • 30%

to 80%

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5 10 15 20 25 30 35 12:00 12:30 13:00 13:30 14:00 14:30 15:00 15:30

Volume (gal)

Time (MST)

Cumulative Runoff SDSMT Green Roof Project July 3, 2016 (1”)

Control (Shingled) German(FLL) Non-German(GreenGrid)

33% reduction

2 4 6 8 10 15:36 16:04 16:33 17:02 17:31 18:00 18:28 Volume (gallons) Time of day (MST)

Cumulative runoff SDSMT Green roof project June 13, 2016 (0.41”)

Control (asphalt roof) Non-German German

52% reduction

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 Reduces urban heat islands  Reduces Energy costs

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Chicago Cit y Hall green roof almost 80F cooler t han convent ional roof on a t ypical summer day

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 Lack of local design knowledge

  • Proof-of-Concept (next scale of research)
  • Design specifications & recommendations
  • Maintenance & plant care
  • Green roof performance
  • Airport green roof failure

 Watering regiment

  • Needed for semi-arid climate
  • Water conservation
  • Maximize storage

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Green Grid Trays (sdsmt)

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 Recommended products:

  • S

edum tuff tiles (left) or Live Roof trays (right)

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1.

Det ermine wat ering regiment t o maint ain opt imal plant healt h & promot e wat er conservat ion while providing opt imal st orage capacit y for st ormwat er runoff reduct ion

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Det ermine design specificat ions & maint enance plan (proof-of-concept )

3.

Det ermine heat t ransfer (pot ent ial energy savings)

4.

Monit or wat er qualit y

5.

Opt imize aut omat ion

 Interactive kiosk display  Remote sensor(data) viewing  Control irrigation via sensors  Monitor performance & health

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 Unique opportunity to lead the way for Rapid City

in sustainable design (650,000 people visit the airport each year)

 S

howcase environmental commitment

 S

upport education & local research

 Advance knowledge in the green roof research field

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  • Proposed budget for 2-year Green Roof proj ect:
  • Tot al amount request ed from WDWDD = $26,000
  • $23,000 for the first year
  • $3,000 for the second year
  • Addit ional proposals from ot her grant s have been submit t ed

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Category Total Cost Airport SDSM&T WDWDD Grants

Green roof Install

$45,000 $-45,000

Research Equip.

$30,000 $-10,000 $-5,000 $-15,000

  • Equip. Setup &

Tech support

$35,000 $-5,000 $-30,000

GRA

$70,000 $-15,000 $-55,000

PI

$40,000 $-20,000 $-20,000

Water Quality

$6,000 $-6,000

Grand Total

$226,000

  • $55,000

$-40,000 $-26,000 $-105,000

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 Green Roof patio benefits at RAP airport:

  • Reduce current roof loads
  • Provide needed stormwater management
  • Aesthetics & visibility

 548,000 passengers in 2016

  • Minimize maintenance

Maint enance cont ract Irrigat ion syst em

  • Earn sustainability credits

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Vermont Burlington Airport

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 Reduce stormwater pollutants:

  • Filters out acid rain & heavy metals
  • Reduce pollutant mass loading with reduced

run-off volumes

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10/2/2015 (0.1 in) 3/24/2016 (0.2 in) 5/25/2016 (0.2 in) 6/14/2016 (0.4 in) Asphalt 362.4 247.48 355.8 401.0 German 46.4 51.97 55.24 209.9 non-German 108.7 106.93 67.3 277.8 50 100 150 200 250 300 350 400 450

Total Suspended Solids (mg)

10/2/2015 (0.1 in) 3/24/2016 (0.2 in) 5/25/2016 (0.2 in) 6/14/2016 (0.4 in) Asphalt 166.7 33.51 41.6 37.9 German 39.7 17.32 7.77 18.5 non-German 45.3 29.16 8.7 27.3 20 40 60 80 100 120 140 160 180

Nitrogen (mg)

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 Additional benefits:

  • Reduces noise pollution
  • Reduces air emission impacts
  • Prolongs & protects roofing membrane

Reduces re-roofing cost Reduces wast e t o landfills Reduces pollut ion and conserves nat ural

resources

Reduces insurance claims due t o hail

  • Non-reflecting roof

Maint ains airport safet y

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 Reduces noise pollution:

 Absorb sound waves produced by machinery,

t raffic, and airplanes

  • A vegetated roof with a 4.7 inch substrate layer can

reduce sound by 40 decibels

  • A 7.9 inch substrate layer can reduce sound by 46-50

decibels

 Reduces Air Emission Impacts

 Foliage absorbs dust and greenhouse gases and

filt ers airborne part icles

 10.8 ft 2 of veget at ed roof removes ~4.4 pounds of

part iculat e mat t er (PM) per year

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 Airport roof installed in November

  • Mid-October recommend latest

 Plants started inside a nursery  Design did not follow FLL guidelines

  • S
  • il design
  • Growing t rays
  • Wind erosion prot ect ion

 Plugs planted 6” to 8” O.C.  No irrigation system  Lack of local design knowledge

  • Maintenance & plant care

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Green Grid Trays (sdsmt)

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 Do not start with plugs

  • Different soil media, started indoors,

incomplete plant coverage, prone to wind scour  Maintenance required:

  • Watering
  • Weeding
  • Fertilizing
  • Winter care
  • S

pot repair

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 4” Live Roof (trays): $20/ S

F * 2,220 S F= $44,400

  • $14/ S

F for trays + 1/ S F wind discs

  • $3/ S

F Installation

  • $3000 Freight
  • 29 lbs./ sf saturated

 6” Live Roof (trays): $25/ S

F * 2,220S F = $55,500

  • $19/ S

F for trays + 1/ S F wind discs

  • $3/ S

F Installation

  • $3000 Freight
  • 50 lbs./ sf saturated

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Proposed Green Roof Area (gravel areas)

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 S

edum Tuff Tiles:

  • $4/ S

F for tiles

  • $2,154 Freight (roughly $1/ S

F)

  • $3/ S

F 4” S

  • il (includes freight) – 47 lbs./ sf (includes 2” of pee-rock)
  • $5/ S

F 6” S

  • il (includes freight) – 67lbs./ sf (includes 2” of pee-rock)
  • $2/ S

F S eparation Fabric

  • $7 to $10/ S

F Installation 4”

  • $10 to $13/ S

F Installation 6”

 Total:

  • 4” – $17- $20/ S

F ($44,400)

  • 6” - $22- $25/ S

F ($55,500)

  • Note: (includes crane cost)

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Proposed Green Roof Area (gravel areas)

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 Irrigat ion: TBD

  • Est. $4,000 to $6,000 (S

elf draining closed loop system)

 2 year maint enance cont ract : TBD

  • Depending on weather conditions and spot repair needs
  • Est. $5,000 to $10,000 per year

 Pea gravel removal: TBD

  • Est. $3,500 to $4,500

 Electro Field Vector Mapping

  • Leak detection system
  • Est. $3,500 base price (install only)
  • Not included in Grand Total

 Grand Total

 4” system = $75,000

 6” system = $86,000

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Proposed Green Roof Area (gravel areas)

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 Benefits:

  • Addit ional grant monies t o cover research cost s
  • S

ave money on recommended maint enance cont ract due t o t he maint enance being provided by GRA

  • Aut omat ion/ sensor syst em will become t he Airport s
  • Provides continuous data
  • reduce long-term maintenance
  • S

ave money and conserve water

  • Interactive kiosk display will

provide hands-on education

  • Assures init ial survival of

green roof

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Typical FLL roof system (Top), GreenGrid Trays (Bottom) (Green Roof S ervice LLC)

German FLL Roof GreenGrid Roof

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S torm water runoff reduction

Quality of storm water runoff

Thermal conductivity (Insulation value)

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FLL Green Roof GreenGrid Roof

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S hingled roof (left), FLL Green roof (middle), GreenGrid trays (Right)

FLL Green Roof

GreenGrid Roof

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  • Dr. Kenner’s Water Resource Grad Class (self photo)
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Water flow monitoring equipment: Left: Tipping bucket, Right: S

  • linst level logger (US

GS )

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Green roof temperature and moisture content monitoring equipment above and below grade ( Columbia University)

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S hows the hydrograph and the volume of runoff from the S eptember 28, 2015 rain event. (Grad Class)

97.5% reduction 96.3% reduction

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S hows the volume of runoff from the October 2, 2015 rain event. (Grad class)

75% reduction 88% reduction

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S hows the volume of runoff for the Green roofs only, from the October 2, 2015 rain event.. (Grad class)

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S ignificant nutrient load reduction *Bacteria loading requires further research

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Capture 3 more storm events for water quality testing

Continue to monitor runoff reduction

Further thermal evaluations

Monitor & compare plant growth

Collaborate with S yracuse University to compare regional differences

Local soil mixture

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 RES

PEC Engineering

 Galen Hoogestraat from the local US

Geological S urvey (US GS ) branch

 Todd Walles from GreenGrid Roofs  Jorg Breuning from Green Roof S

ervice LLC

 Dr. Benning & Dr. Kenner from S

DS M&T

 Bret Mcmanigal from Dakota Craft;  Rooflite  Jolly Lane Greenhouse  Clyde from All American Roofing  Dan Iseland, Accurate builders, my son S

eth and his friends (everyone else who helped build the living roofs!)

 Dr. Kenner’s water resource Graduate class

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