diagnostic agronomy workshop flood irrigation – the future russell ford manager – rice research...
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Diagnostic Agronomy WorkshopFlood Irrigation – the Future
Russell FordManager – Rice Research Australia
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Rice Production Area
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Improving operational efficiency and Water Use Efficiency
• Hi manual input for irrigation control – telemetry• Slow water on/water off timings• Weakness of traditional systems = perimeter banks• all turning must be done within 3-5 ha basins• Problems
– Limits ability to adopt precision ag systems– Compaction of “sensitive” soils (high clay, sodic)– Weed seed reserve on banks
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Traditional ‘natural’ contour basins
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Lasered contour basins
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Lasered contour, side-ditch delivery
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Kooloos v-bay
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Level basin – beds/furrows
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From syphons to bankless
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Conversion from syphons to bankless
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System overview
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Bankless channel
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Flow velocity through 900 mm MIL stop
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 00
1 0
2 0
3 0
4 0
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 00
1 0
2 0
3 0
4 0
0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 00
1 0
2 0
3 0
4 0
5 0
Bay 1 into Bay 2 - 14.4 ML/day• mean velocity = 0.402 m/s• avg mid-stream velocity = 0.510 m/s
Bay 2 into Bay 3 – 8.6 ML/day• mean velocity = 0..252 m/s• avg mid-stream velocity = 0.314 m/s
Bay 3 into Bay 4 – 24.7 ML/day• mean velocity = 0..599 m/s• avg mid-stream velocity = 0.683 m/s