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Precision Irrigation

Precision Irrigation. By : Matthew Gassen BAE 4213. Irrigation in the US. 55.3 million acres irrigated in 2002 Application rate has decreased 160 million acre-feet of water withdrawn. Sources of irrigation. Ground Water 41% withdrawals at 32 million acres Increased from 37% in 1960

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Precision Irrigation

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  1. Precision Irrigation By : Matthew Gassen BAE 4213

  2. Irrigation in the US • 55.3 million acres irrigated in 2002 • Application rate has decreased • 160 million acre-feet of water withdrawn

  3. Sources of irrigation • Ground Water • 41% withdrawals at 32 million acres • Increased from 37% in 1960 • Surface Water • 59% of withdrawals Groundwater flow times usgs cir1139

  4. Cost of Irrigation • Range from $7/acre in MD, $92/acre in AZ, $79/acre in CA, and $175/acre in HI • US average $40/acre • Total of $1.2 billion DLJ Multi-Jet Water Meter

  5. Types of Irrigation • Flood (furrow) irrigation • Center Pivot Irrigation (CPI) • Linear-move (side roll, wheel line)irrigation • Drip microirrigation • Sprinkler and Gravity USDA natural resources conservation service UNL extension Jisl: dripperwithdrop USDA natural resources conservation service

  6. Constant before Variable • Constant water rate before variable • Raise efficiency of system • Linear move covers 30% more of field than CPI • Low Energy Precision Application (LEPA) • 90% of water used by crop compared to 35% USDA natural resources conservation service

  7. Scheduling • Checkbook method • Soil moisture • Input = output based on precipitation, and evaporation • Crop moisture requirements

  8. Variable Rate Based on Temp • Sensors • Infrared Thermo-Couples (IRT) • Red Band Wave (RED) • Near Infrared Band (NIR) • Remote: Satellites, and Aircraft • Real time: handheld or on system

  9. Variable rate based on location • Soil type • Topography • Field shape • Mulitple crops • Irregularly shaped fields • All linked to GPS The groundwater foundation

  10. Questions??

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