MODEL WATER EFFICIENT LANDSCAPE ORDINANCE GUIDANCE

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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.

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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

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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

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LANDSCAPE DESIGN PLAN

GRADING PLAN

IRRIGATION PLAN

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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

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