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Causes of Water WasteMike Baron

Toro Irrigation

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18% - 20% CA Electricity Used To Pump or Treat Water

The Water-Energy NEXUS

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We Don’t Want To See. We Can’t Afford.

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Sprinklers

RunoffSoil

Infiltration

Coarse Sand .75”-1”/hr.

Fine Sand .5”-.75”

Fine Sandy Loam .35”-.5”

Silt Loam .15”-.4”

Clay Loam .1”-.2”

Conventional Spray 1.58”/HRToro Precision Sprays 1.00”/HRFixed Arc Rotating Nozzle 0.75”/HRToro Precision Rotating 0.55”/HRHunter MP Rotator: 0.39”/HR

Intake Rates vs. Application Rates

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What Causes This Water Waste?

• Runoff?– High application rate?

– Excessive run times?– Overspray? – Leaking sprinkler

seals?– Non-plumb heads? – Wind?– Controller problem?– Valve stuck on?

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• Ponding– Excessive run times?– Low head drainage?– High application rate?– Controller problem?– Valve stuck on?

What Causes This Water Waste?

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Low Head Drainage – Silent & Costly

• Elevation Change– Between valve & heads– Water flows down hill

• HOA– 19,000 heads– 250,000’+ pipe

• 1” PVC Assumption– 4 cycles per day– 4,363.6 units/month

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Slope & High Application Rates

What Causes This Water Waste?

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The irrigation system shall be designed to prevent runoff, low head drainage, overspray, or other similar conditions where irrigation water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways or structures.

MWELO – AB1881?

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High Pressure Misting

Compounded Waste From Windrift

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Pressure Gauge Kit

• PSI Is Important– Static vs. Dynamic– High PSI Waste– Low PSI Waste

• Manufacturer Specs– Sprays– Rotors– Bubblers– Drip

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MWELO – AB1881

The irrigation system shall be designed to ensure that the dynamic pressure at each emission device is within the manufacturer’s recommended pressure range for optimal performance.

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MPR = Matched Precipitation Rate

90°

ARC Rate

Precipitation

0.99”/hr

180°

0.49”/hr

360°

0.25”/hr

Performance Factors

• 2.0 gpm nozzle

• 30’ radius

1”

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Before Radius Adjustment Precip =

0.49”/hr

After 5’ Radius Reduction Precip =

0.71”/hr% Change: 44.9%

Radius Reduction & MPR

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Avoid Mixing Sprinkler Types

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Is This Water Waste?

Mixing Sprinkler Types Guarantees Either Over Watering Or Severe Stress

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WEATHER = ET (inches)

Tempº

Solar RadiationHumidity Wind

JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC TTL

2.2 2.7 3.7 4.7 5.5 5.8 6.2 5.9 5.0 3.9 2.6 1.9 50.1

Monthly ET For Los Angeles, CA

35.5% 43.5% 59.7% 75.8% 88.7% 93.5% 100% 95.2% 80.6% 62.9% 41.9% 30.6%

Monthly Water Budget %

The Impact of Weather

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Weather-based irrigation controllers or soil moisture-based controllers or other self-adjusting irrigation controllers shall be required for irrigation scheduling in all irrigation systems.

Commercial Models

• 12, 24, 36 & 48 Stations

• Flow Sensing

• SWAT Tested & Approved

• No Weather Station Installation/Maintenance Required

Residential Models

• 6, 9, 12 & 24 Stations

• SWAT Tested & Approved

• No Weather Station Installation/Maintenance Required

MWELO – AB1881

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High flow sensors that detect and report high flow conditions created by system damage or

malfunction are recommended.

MWELO – AB1881

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• The irrigation system shall be designed to prevent runoff, low head drainage, overspray, or other similar conditions where irrigation water flows onto non-targeted areas, such as adjacent property, non-irrigated areas, hardscapes, roadways or structures.

MWELO – AB1881

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You Don’t Have To Change.

Survival Is Not Mandatory.

Edward S. Deming