MODEL WATER EFFICIENT LANDSCAPE ORDINANCE GUIDANCE
2
NEW CHANGES TO THE MODEL WATER EFFICIENT LANDSCAPE ORDINANCEEffective December 1, 2015
New:
• New construction projects > 500 square feet.
• Rehabilitated landscape projects > 2,500 square feet.
• New Irrigation Efficiency for drip and overhead spray
• New ET Adjustment Factor (ETAF)
• New Turf restrictions
3
NEW CHANGES TO THE MODEL WATER EFFICIENT LANDSCAPE ORDINANCEEffective December 1, 2015
Revised:
• Revised Maximum Applied Water Allowance (MAWA) calculation
• Revised Estimated Total Use (ETWU) calculation
• Revised Soils test requirements
4
EXEMPT• Landscape projects with a temporary
• New Landscape <500 square feet
• Rehabilitated Landscapes <2,500 square feet
• Registered local, state or federal historical sites
• Ecological restoration projects without permanent irrigation system
• Mined-land reclamation projects without permanent irrigation system
5
SIX ELEMENTS OF THE LANDSCAPE DESIGN PACKAGE
Landscape Design Plan
Irrigation Plan
Water Efficient
Landscape Worksheet
Soils Management Report
Grading Design Plan
Project Information
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MOST AFFECTED ELEMENTS OF THE LANDSCAPE DESIGN PACKAGE
WATER EFFICIENT LANDSCAP
E WORKSHE
ET
LANDSCAPE DESIGN
PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE IRRIGATION PLAN
“I have complied with the criteria of the ordinance and applied them accordingly for the efficient use of water in the irrigation design plan.” WATER
EFFICIENT LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE IRRIGATION PLAN• Irrigation efficiencies are 0.75
for overhead spray devices and 0.81 for drip systems.
• Master valves, flow sensors, rain sensors and Smart controllers are required.
• Overhead spray is prohibited within 24 inches of any non-permeable surface
WATER EFFICIENT
LANDSCAPE WORKSHEE
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LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE IRRIGATION PLAN• A diagram of the irrigation
plan showing hydrozones shall be kept with the irrigation controller for subsequent management purposes.
• Check valves or anti-drain valves are required where low point drainage occurs.
• Provide Irrigation Schedule
WATER EFFICIENT
LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE WATER EFFICIENT LANDSCAPE WORKSHEET• Potable: MAWA =(ETo)(.62)x[(ETAF x LA) • Recycled: MAWA =(ETo)(.62)x[(ETAF x LA)+((1-ETAF) x SLA)]
WATER EFFICIENT LANDSCAP
E WORKSHE
ET
LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
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EXAMPLE MAWA CALCULATION
•Given:A landscape project in Fresno, CA consists of 50,000 square feet of irrigated landscape without any Special Landscape Area (SLA). The ET for Fresno is 51.1 inches.
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EXAMPLE MAWA CALCULATION• MAWA =(ETo)(.62)x[(ETAF x LA)
• 0.45 is new ETAF (ET adjustment factor) Reference Evapotranspiration (ETo) 51.1 (Fresno)
ETWU requirement
ETWU requirement
ETWU requirement
ETWU requirement
MAWA requirement
ETWU requirement
Hydrozone#/Planting Description
Plant Factor (PF)
Irrigation Method
Irrigation Effi ciency (IE) ETAF (PF/IE)
Landscape Area (LA) (sq. ft.) ETAF x Area
Estimated Total Water Use (ETWU)
1) very low water use plants 0 drip 0 0.00 20,000 0 02) low water use plants 0 drip 0 0.00 10,000 0 03) moderate water use plants 0 overhead 0 0.00 20,000 0 0
Totals 0.00 50,000 0 0
low water use plants 1 0 0 0medium water use plants 1 0 0 0medium water use plants 1 0 0 0
Totals 0 0 00
712,845
Regular Landscape Areas
Special Landscape Areas (SLA)
Estimated Total Water Use (ETWU) in gallons
Maximum Applied Water Allowance (MAWA) in Gallons
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REQUIREMENTS ON THE WATER EFFICIENT LANDSCAPE WORKSHEETRevised Estimated Total Water Use (ETWU) Calculations:
• Potable: ETWU= (ETo)(0.62) x (ETAF x Area)
WATER EFFICIENT LANDSCAP
E WORKSHE
ET
LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
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EXAMPLE ETWU CALCULATION
•Given:
Planting consists of three planting zones. Zone 1 =plant factor of 0.1, and has an irrigation efficiency of 0.81. Zone 2 =plant factor of 0.2, and has an irrigation efficiency of 0.81. Zone 3 =plant factor of 0.6, and has an irrigation efficiency of 0.75.
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EXAMPLE ETWU CALCULATION
Reference Evapotranspiration (ETo) 51.1 (Fresno)ETWU
requirementETWU
requirementETWU
requirementETWU
requirementMAWA
requirementETWU
requirementHydrozone#/Planting Description
Plant Factor (PF)
Irrigation Method
Irrigation Effi ciency (IE) ETAF (PF/IE)
Landscape Area (LA) (sq. ft.) ETAF x Area
Estimated Total Water Use (ETWU)
1) very low water use plants 0.1 drip 0.81 0.123 20,000 2,469.14 78,2272) low water use plants 0.2 drip 0.81 0.247 10,000 2,469.14 78,2273) moderate water use plants 0.6 overhead 0.75 0.800 20,000 16,000.00 506,912
50,000 20,938.27 663,366
low water use plants 1 0 0 0medium water use plants 1 0 0 0medium water use plants 1 0 0 0
Totals 0 0 0663,366712,845
Regular Landscape Areas
Special Landscape Areas (SLA)
Estimated Total Water Use (ETWU) in gallons
Maximum Applied Water Allowance (MAWA) in Gallons
Totals
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MWELO COMPLIANCE
RESULTS:•MAWA=712,845 gallons• ETWU=663,366 gallons
PROJECT COMPLIES WITH THE ORDINANCE!
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REQUIREMENTS ON THE LANDSCAPE DESIGN PLAN
Landscape planting plans require the following statement on the first sheet of the set of plans:
“I have complied with the criteria of the ordinance and applied them accordingly for the efficient use of water in the landscape design plan.”
WATER EFFICIENT
LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN
PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE LANDSCAPE DESIGN PLAN• Turf is prohibited in street
medians.
• Areas less than ten feet shall be irrigated with subsurface irrigation
• Soil prep shall be transformed to a friable condition
• No turf in slopes >25% (4:1)
• High water use plants (plant factor of 0.7-1.0) are prohibited in street medians.
WATER EFFICIENT
LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN
PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE LANDSCAPE DESIGN PLAN• Soil amendments shall be
incorporated according to recommendations of the soil report
• Install compost at a (min) rate of 4 cubic yards per 1,000 square feet of permeable area
• 3” (min) layer of mulch shall be applied on all exposed soil surfaces.
WATER EFFICIENT
LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN
PLAN
GRADING PLAN
IRRIGATION PLAN
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REQUIREMENTS ON THE GRADING PLAN
Grading plans require the following statement on the first sheet of the set of plans:
“I have complied with the criteria of the ordinance and applied them accordingly for the efficient use of water in the grading design plan.”
WATER EFFICIENT
LANDSCAPE WORKSHEE
T
LANDSCAPE DESIGN PLAN
GRADING PLAN
IRRIGATION PLAN
21
MOST AFFECTED ELEMENTS OF THE LANDSCAPE DESIGN PACKAGE
WATER EFFICIENT LANDSCAP
E WORKSHE
ET
LANDSCAPE DESIGN
PLAN
GRADING PLAN
IRRIGATION PLAN
22
NEW CHANGES TO THE MODEL WATER EFFICIENT LANDSCAPE ORDINANCEEffective December 1, 2015
Revised:
• Revised Maximum Applied Water Allowance (MAWA) calculation
• Revised Estimated Total Use (ETWU) calculation
• Revised Soils test requirements
23
NEW CHANGES TO THE MODEL WATER EFFICIENT LANDSCAPE ORDINANCEEffective December 1, 2015
New:
• New construction projects > 500 square feet.
• Rehabilitated landscape projects > 2,500 square feet.
• New Irrigation Efficiency for drip and overhead spray
• New ET Adjustment Factor (ETAF)
• New Turf restrictions
24
EXEMPT• Landscape projects with a temporary
• New Landscape <500 square feet
• Rehabilitated Landscapes <2,500 square feet
• Registered local, state or federal historical sites
• Ecological restoration projects without permanent irrigation system
• Mined-land reclamation projects without permanent irrigation system
THANK YOU
MODEL WATER EFFICIENT LANDSCAPE ORDINANCE