Irrigation System Assessment

Distribution uniformity is a measure of *

individual sprinkler performance

how evenly the system applies the water to the crop

how even soil moisture is following irrigation

Distribution uniformity compares *

the depth in the lowest four buckets with the overall depth applied

the lowest quarter of depths with the highest quarter of depths

the lowest quarter of depths with the average of all depths

the depth in the lowest four buckets with the average of all 24 buckets

If we can increase the DULQ from ~0.7 to ~0.9 we can effectively irrigate *

10% more land

20% more land

30% more land

50% more land

If we can increase the DULQ from ~0.7 to ~0.9 we can save *

10% on power and water

20% on power and water

50% on power and water

MATHS!
A grower measured the volume of water caught in 20 buckets after an irrigation event. She measured the volumes and the calculated DULQ was *

0.804

0.820

0.848

0.866

For a travelling irrigator, we would consider the result was *

Excellent

Very good

Average

Poor

The grower wants to make sure 7/8ths of her plants would receive at least 30 mm of irrigation, so she should set the average applied depth to: *

24.6 mm

26.0 mm

36.6 mm

43.3 mm

The Compliance checklist helps ensure your system and management *

meets regional plan rules

meets consent conditions

has critical dates in your diary

ensures staff understand process and requirements for reporting

has checked and follows market requirements

A compliance check should test that water meter data reaches the regional council *

True

False

A compliance check will measure system pressure meets design criteria *

True

False

Water supply checks must begin with the system turned on *

True

False

Which of the following should be checked with the irrigation system running? *

Well water depth

Pump lubrication

Pump vibration

Flow rate

Filter cleanliness

Power supply

Headworks outlet pressue

Pressure at furthest hydrant

How many checks are recommended as part of a Travelling Irrigator pre-season check? *

< 10

10 – 20

20 – 30

> 30

Which checks should be made with the system turned off and locked? *

Wheel lugs and bolts

Lubrication

Inlet pressure

Seals and flanges

Nozzle/sprinkler condition

Pressure at furthest hydrant

How many checks are recommended as part of a pivot or linear irrigator pre-season check? *

< 10

10 – 20

20 – 30

> 30

Which checks should be made with the system turned on and operating? *

Hose condition and fittings

Pivot point for leaks

Control unit battery health

Sprinkler dropper condition

Sprinklers turning correctly

Inlet pressure

Flanges for leaks

How many checks are recommended as part of a micro-irrigation system pre-season check? *

< 10

10 – 20

20 – 30

> 30

Filters should be opened, cleaned and replaced as necessary, before the system is turned on. *

True

False

Because of their low pressure, micro-irrigation systems do not need water metering. *

True

False

Pressure should be measured *

before the filter

after the filter

at the pump with each block or set of blocks running

at the end of laterals furthest from the pump

Bucket	1	2	3	4	5	6	7	8	9	10
Volume	210	270	240	350	360	270	250	260	285	255

Bucket	11	12	13	14	15	16	17	18	19	20
Volume	320	280	345	260	390	380	365	260	385	360

Irrigation Management

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