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Manage the System
Operation
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© Irrigation Association
Determine the System Interval
• Intervals during peak and non-peak periods
• Scheduling with the checkbook method
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© Irrigation Association
Take Advantage of Off-Peak Pricing
• Electrical power rate structures
• Special electrical controls
• Modifications to design
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© Irrigation Association
Use Soil Moisture Sensors to Improve
Scheduling
• Simple measurements
• Soil based controls
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© Irrigation Association
Start and Stop the System
• Soil moisture trigger points
• Anticipating rain
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Appearance of clay, clay loam, and silty clay loam soils at various soilmoisture conditions.
Available Water Capacity 1.6-2.4 inches/foot
Percent Available: Currently available soil moisture as a percent of available water capacity.
In/ft. Depleted: Inches of water needed to refill a foot of soil to field capacity.
0-25 percent available 2.4-1.2 in/ft. depletedDry, soil aggregations separate easily, clods are hard to crumble with applied pressure.
(Not pictured)
25-50 percent available 1.8-0.8 in/ft. depletedSlightly moist, forms a weak ball, very few soil aggregations break away, no water stains, clods
flatten with applied pressure.
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OLD and NEW TOOLS
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© Irrigation Association
Scheduling Multiple Pivots
Pressure constraints
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© Irrigation Association
Computer Management
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© Irrigation Association
Implement Current Control Technology
Off-site sensing and control
(SCADA)
Telemetry (radio, cellular, etc.)
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© Irrigation Association
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© Irrigation Association
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© Irrigation Association
Uniformity Based on Infrared
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© Irrigation Association
Modify Soil Cultivation Practices to Reduce
Runoff
Call in number 1-888-450-5996, confirmation # 3268441.Call in number 1-888-450-5996, confirmation # 3268441.Call in number 1-888-450-5996, confirmation # 3268441.
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Dammer-Dikker
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Surface storage from crop residue
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© Irrigation Association
Blocking Off the Furrow
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© Irrigation Association
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© Irrigation Association
Let’s Go to Our Manuals and Look at Setting Irrigation
Intervals
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© Irrigation Association
Chapter 9Draw Up Plans and
Specs
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© Irrigation Association
Combine Manufacturer Plans with Local Details
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Plan view
© Irrigation Association
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Details
© Irrigation Association
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© Irrigation Association
Compile a Systems Specifications Manual
• Manufacturer specs
• Retention pond
• Well and/or screening
• Mainline
• Pump
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© Irrigation Association
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© Irrigation Association
Compile a System Operations Manual
• Pivot operation and maintenance
• Scheduling guidelines
• Application/depth vs. speed
• Winterization of the system
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© Irrigation Association
Let’s Go to Our Manuals -
Chapter 9
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© Irrigation Association