Designing An irrigation system

Designing An irrigation system
What you need to know

Where to start?

Where to start? Old pump in the shed

Old pump in the shed May cost more in energy over the life of the pump
Where to start? Old pump in the shed May cost more in energy over the life of the pump

of the lifetime cost of a system
Where to start? of the lifetime cost of a system

of the lifetime cost of a system 5% is capital costs
Where to start? of the lifetime cost of a system 5% is capital costs

Where to start? of the lifetime cost of a system 5% is capital costs 10% is maintenance costs

Where to start? of the lifetime cost of a system 5% is capital costs 10% is maintenance costs 85% is energy Costs

Where to start? Lifetime cost $100,000

Lifetime cost $100,000 5% in capital costs - $5000
Where to start? Lifetime cost $100,000 5% in capital costs - $5000

Where to start? Lifetime cost $100,000 5% in capital costs - $5000
10% on maintenance - $10000

Where to start? Lifetime cost $100,000 5% in capital costs - $5000
10% on maintenance - $10000 85% on energy - $85000

Mate with a few rolls of poly
Where to start? Mate with a few rolls of poly

Mate with a few rolls of poly Smaller diameter Pipe
Where to start? Mate with a few rolls of poly Smaller diameter Pipe

Where to start? Mate with a few rolls of poly Smaller diameter Pipe
more pressure required For same flow

more pressure required For same flow Bigger pump

more pressure required For same flow Bigger pump More energy

Where to start? 200 m of pipe

200 m of pipe @ 2L/second (7200L/hr) Flow Rate
Where to start? 200 m of pipe @ 2L/second (7200L/hr) Flow Rate

200 m of pipe @ 2L/second (7200L/hr) Flow Rate energy cost $0.25/kWhr
Where to start? 200 m of pipe @ 2L/second (7200L/hr) Flow Rate energy cost $0.25/kWhr

@ 2L/second (7200L/hr) Flow Rate
Where to start? 200 m of pipe @ 2L/second (7200L/hr) Flow Rate energy cost $0.25/kWhr 32 mm pipe = $105/ML

Where to start? 200 m of pipe @ 2L/second (7200L/hr) Flow Rate energy cost $0.25/kWhr 32 mm pipe = $105/ML 50 mm Pipe = $11.50/ML

Where to start? 200 m of pipe @ 2L/second (7200L/hr) Flow Rate energy cost $0.25/kWhr 32 mm pipe = $105/ML 50 mm Pipe = $11.50/ML difference of $93.50/ML

Where to start?

Start at the end

apply the correct amount of water for optimum productivity
Start at the end apply the correct amount of water for optimum productivity

Start at the end apply the correct amount of water
for optimum productivity while minimising operating costs

If this isn’t achieved the system may cost more to run at best
Start at the end If this isn’t achieved the system may cost more to run at best

yield and quality reductions at worst
Start at the end If this isn’t achieved the system may cost more to run at best yield and quality reductions at worst

Calculate the amount of water required

Evaporation

Evaporation Measured quantity

Evaporation Measured quantity The loss of water from a water surface

Evaporation Measured quantity The loss of water from a water surface Few stations gather and publish this data

Evapotranspiration

Evapotranspiration More closely estimates crop water use

Evapotranspiration More closely estimates crop water use Calculated from weather data

Maximum Evapotranspiration rates

Maximum evapotranspiration 10 mm Calculate the amount of water required Maximum Evapotranspiration rates

Maximum evapotranspiration 10 mm Calculate the amount of water required Crop factor

Maximum evapotranspiration 10 mm Calculate the amount of water required Crop factor approximates crop water use compared to evapotranspiration rate

Maximum evapotranspiration 10 mm Calculate the amount of water required Crop factor approximates crop water use compared to evapotranspiration rate Crop factor of 0.8 = crop uses 80% of the Evapotranspiration

Maximum evapotranspiration 10 mm Crop factor 0.8 Calculate the amount of water required Crop factor approximates crop water use compared to evapotranspiration rate Crop factor of 0.8 = crop uses 80% of the Evapotranspiration

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Calculate the amount of water required Crop factor approximates crop water use compared to evapotranspiration rate Crop factor of 0.8 = crop uses 80% of the Evapotranspiration

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Calculate the amount of water required

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Calculate the amount of water required Distribution uniformity DU

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Calculate the amount of water required Distribution uniformity DU how uniform the water is applied across the irrigated area

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Calculate the amount of water required Distribution uniformity DU how uniform the water is applied across the irrigated area % DU Extra minutes of irrigation per hour of irrigation 70 27 75 20 80 15 85 11 90 7 95 3

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Calculate the amount of water required Distribution uniformity DU how uniform the water is applied across the irrigated area % DU Extra minutes of irrigation per hour of irrigation 70 27 75 20 80 15 85 11 90 7 95 3

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Calculate the amount of water required Distribution uniformity DU how uniform the water is applied across the irrigated area % DU Extra minutes of irrigation per hour of irrigation 70 27 75 20 80 15 85 11 90 7 95 3

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Calculate the amount of water required Measure the area to be Irrigated

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² Calculate the amount of water required Measure the area to be Irrigated

Calculate the volume of water to apply
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² Calculate the amount of water Calculate the volume of water to apply

Calculate the volume of water to apply 1 mm applied on 1m² = 1L
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Calculate the amount of water Calculate the volume of water to apply 1 mm applied on 1m² = 1L

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Calculate the amount of water Calculate the volume of water to apply 1 mm applied on 1m² = 1L average mm to apply

Calculate the amount of water
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Calculate the amount of water Calculate the volume of water to apply 1 mm applied on 1m² = 1L average mm to apply x Irrigated area m²

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Calculate the amount of water Calculate the volume of water to apply 1 mm applied on 1m² = 1L average mm to apply x Irrigated area m² = Litres to apply

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Calculate the amount of water Calculate the volume of water to apply 1 mm applied on 1m² = 1L average mm to apply x Irrigated area m² = Litres to apply

Available Time to apply water
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting system control - manual or automatic

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting system control - manual or automatic Keeping Foliage dry

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting system control - manual or automatic Keeping Foliage dry downtime for repair and maintenance

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting system control - manual or automatic Keeping Foliage dry downtime for repair and maintenance Water availability

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Available Time to apply water time of use tariffs self-generated solar power other activities - spraying and harvesting system control - manual or automatic Keeping Foliage dry downtime for repair and maintenance Water availability

Calculate the FLOW RATE
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Calculate the FLOW RATE

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Calculate the FLOW RATE Volume to apply (L)

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Calculate the FLOW RATE Volume to apply (L) ÷ Hours Available to apply water

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Calculate the FLOW RATE Volume to apply (L) ÷ Hours Available to apply water = Flow rate

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Calculate the FLOW RATE Volume to apply (L) ÷ Hours Available to apply water = Flow rate

Select the emitter Maximum evapotranspiration 10 mm Crop factor 0.8
Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Select the emitter

appropriate application rate for substrate or soil type
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Select the emitter appropriate application rate for substrate or soil type

Maximum evapotranspiration
10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Select the emitter appropriate application rate for substrate or soil type Overhead Sprinklers, microsprinklers or drippers.

10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Select the emitter appropriate application rate for substrate or soil type Overhead Sprinklers, microsprinklers or drippers. operating pressure

10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Select the emitter appropriate application rate for substrate or soil type Overhead Sprinklers, microsprinklers or drippers. operating pressure flow rates required for the emitter

Pipe sizing Maximum evapotranspiration 10 mm Crop factor 0.8
Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing

balance between capital and energy costs
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing balance between capital and energy costs

Pipe sizing balance between capital and energy costs
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing balance between capital and energy costs minimise pressure losses due to excessive friction

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing balance between capital and energy costs minimise pressure losses due to excessive friction Use pipe friction loss charts to correctly size pipes

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing balance between capital and energy costs minimise pressure losses due to excessive friction Use pipe friction loss charts to correctly size pipes Mainline velocity between m/second

Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Pipe sizing

Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Pipe sizing

Submains and Lateral Pipe sizing
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Submains and Lateral Pipe sizing

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters reducing flow rates along the pipe

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters reducing flow rates along the pipe Pressure loss will be approximately 1/3 of full flow

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters reducing flow rates along the pipe Pressure loss will be approximately 1/3 of full flow Aim for Velocity in laterals of 2.0 m/second

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters reducing flow rates along the pipe Pressure loss will be approximately 1/3 of full flow Aim for Velocity in laterals of 2.0 m/second Flow rate variation across irrigated area <5%

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Submains and Lateral Pipe sizing water diverted into multiple pipes and out of emitters reducing flow rates along the pipe Pressure loss will be approximately 1/3 of full flow Aim for Velocity in laterals of 2.0 m/second Flow rate variation across irrigated area <5% Pressure variation <10%

Calculate Pressure Head
Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Calculate Pressure Head

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Calculate Pressure Head Pressure required at sprinkler

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Calculate Pressure Head Pressure required at sprinkler Friction loss through Pipes and fittings

Maximum evapotranspiration 10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Calculate Pressure Head Pressure required at sprinkler Friction loss through Pipes and fittings Elevation difference from water to emitter

10 mm Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Select the pump Use pump curves to select pump that best meets operating pressure and flow rates

Select the pump Maximum evapotranspiration 10 mm Crop factor 0.8
Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Select the pump

Select the pump Best Efficiency Point Maximum evapotranspiration 10 mm
Crop factor 0.8 Maximum crop water use 8 mm/day Distribution Uniformity DU 85% Average mm to apply 9.4 mm Irrigated area 4000 m² 1 mm on 1 m² = 1 L Volume to apply 37600 L Hours available to apply water 5 hours Flow rate L/hr 7520 L/hr Mainline velocity m/second 50 mm pipe Lateral velocity 2.0 m/second Flow rate variation < 5% Pressure variation < 10% Best Efficiency Point Select the pump

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Designing An irrigation system

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Designing An irrigation system

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