Basin Systems – Bankless Channels Need Faster Drainage For Higher Yields

GRDC - Sam North (NSW DPI), Nima Zoriasateyan and Lloyd Chua (Deakin University)

Type: Research Paper
Knowledge level: Advanced

Farm Table says:

The authors of this paper note in the conclusion: “The bankless channel is the principal cause of excessively long ponding times in basin layouts. The fact that water backs up in contour bays through the bankless channel has been clearly demonstrated, and the effect of this on drainage times has been measured. A pre-condition for consistently achieving high yields and returns per ML in basin surface irrigation systems will be to design and manage them so water is on and off bays in less than 10 hours. Both the field trials and the irrigation modelling show this is clearly possible if bays are supplied individually from a channel, rather than a bankless channel, and not drained into a filling downstream bay”.   Please access the full paper via the link below if this research interests you.

The take home messages from this GRDC funded research are below. Please access the full paper via the link below for methodology, references, acknowledgements and discussion.

Take home messages from the paper include:

  • Consistent high yields can be achieved with quick draining surface irrigation systems.
  • Individually draining bays into a field drain OR skip-watering should be considered if water is on bays for longer than 10 hours. This is a good option for bankless channels on flat terrain (<1:1000) which suffer from water backing up.

2018 - Australia - GRDC - Sam North (NSW DPI), Nima Zoriasateyan and Lloyd Chua (Deakin University)
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