florida-friendly landscaping™ (ffl) irrigation system survey claire lewis & mackenzie boyer
TRANSCRIPT
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Florida-Friendly Landscaping™ (FFL) Irrigation System Survey
Claire Lewis & Mackenzie Boyer
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Why we developed this set of survey instruments
Need quantitative data
FFL Water Savings Table
Survey was developed based upon this
metric
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Water savings table
Objective: Develop measurable metric for impact of FFL practices adopted by
residential water customers
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Month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
De
pth
(in
ch
es
)
0
2
4
6
8
10
Irrig Water Req - Turf 8 inch RZPrecip ETc
Irrigation Requirements Estimation
Turfgrass AnnualWater Req.
N FL, 33 inches/yrS FL, 43 inches/yr
=3,700 gal/1,000 sq ft
1” = 623 gal/1,000 sq ft
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Irrigation run time recommendations: EDIS Publication AE220
Average = 29.4 min event-1
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Baseline irrigation case
•
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10 19040 22070 100 130 160 250 280 310 340 370 More400 460430
35,000
28,000
21,000
14,000
7,000
Nu
mb
er o
f cu
stom
ers
Estimated irrigation (mm month-1)
Theoretical limit = 77 mm month-1
(3.0 in month-1)
Distribution of customers
Baseline case= 108 mm month-1
(4.25 in month-1)
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10 19040 22070 100 130 160 250 280 310 340 370 More400 460430
35,000
28,000
21,000
14,000
7,000
Nu
mb
er o
f cu
stom
ers
Estimated irrigation (mm month-1)
Distribution of customers
Baseline case= 108 mm month-1
(4.25 in month-1)
Orange County= 149 mm month-1
(5.87 in month-1)
Pinellas County= 64 mm month-1
(4.25 in month-1)
Sources:Pinellas County: Haley and Dukes 2012Orange County: Haley and Dukes 2007
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1. Rain sensor
• Savings based on plot study of 5 types of rain sensors and IFAS-recommended irrigation settings
• 8% reduction= 2,541 gal/ 1,000 sqft savings
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2. Calibrate sprinklers to ½” or ¾”
• EDIS Publication ENH63 recommends ½”-¾” per irrigation event
• 25% reduction= 7,942 gal/ 1,000 sqft savings• 50% reduction= 15,884 gal/ 1,000 sqft savings
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3. Calibrate sprinklers to replace 60% of ET
• EDIS Publication AE436 indicates 60% ET replacement generally adequate
• 40% reduction= 12,707 gal/ 1,000 sqft savings
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4. Smart controllers
• ET controllers: 41-43% reduction • Soil moisture sensors: 35-72% reduction • 35% reduction= 11,118 gal/ 1,000 sqft• 72% reduction= 22,872 gal/ 1,000 sqft
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5. Convert turfgrass to landscape bed
• EDIS Publication ENH860 recommends ornamental plants irrigated only as needed after establishment
• Microirrigation: 48% reduction in irrigation• 100% reduction= 31,787 gal/1,000 sqft savings• 48% reduction= 15,589 gal/1,000 sqft savings
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6. Rain barrels
• Irrigation savings for turfgrass from using of 55-gal rain barrel was simulated
• 6% reduction= 1,906 gal/1,000 sqft savings
fyn.ifas.ufl.edu/barrels.htm
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7. Convert spray heads to MSMTs
• Multi-stream multi-trajectory nozzles typically have greater uniformity and have lower flow rates
• 67% reduction= 21,191 gal/1,000 sqft
www.turfmagazine.com/content/TF/2013/04/A9379_1_full.jpg
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There are 3 survey instruments in this set
The FFL Irrigation System Survey
• Intended to be given prior to FFL workshop
FFL Knowledge gain Survey
• Intended to be given after FFL workshop
Irrigation System Follow-up Survey
• Intended to be given 6-12 months after FFL
workshop
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What is Qualtrics
Web-based survey system
Logic based Interactive questions
Data can be analyzed as it is collected
Can be exported to PowerPoint, Word, Excel, or
lynda.com - online training library
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How administered
Online through Qualtrics
Agents
MG
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Who is the survey intended for
Homeowners who have an in ground irrigation system
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What are the benefits to the agents to use
Clear, consistent and measurable reporting
tool
SMART objective
Next steps
fertilizer
pest management
We are now going to go through the survey