Development of improved flow measurement in irrigation water supply
The “Know The Flow” project was initiated in 1997 to address issues relating to the accurate measurement of the delivery of irrigation water to farms. The current most common method, the Dethridge Wheel, was perceived to have problems in some applications. The project was conceived to research solutions to these problems.
in highly productive citrus orchards for minimal environmental footprint
This project aimed to address knowledge gaps and test assumptions regarding the application of modern approaches to the delivery of water and dissolved mineral fertilisers to citrus trees under Australian conditions.
Knowledge is fundamental to improving the competitiveness, responsiveness and levels of innovation that we see in industries.
This research project aimed to determine how information and knowledge about water management and water use efficiency is being used and managed in irrigated cotton and grains and the key factors influencing decision making. To do this, 90 interviews of growers of cotton and grains, consultants, extension workers, government researcher officers, and irrigation (more)...
The Australian Cotton Cooperative Research Centre through this knowledge management project aimed to develop a better understanding of the knowledge pathways being used by irrigated cotton and grain growers, consultants and support agencies.
The current study focused on how cotton and grain irrigators and their consultants access information about irrigation and generate knowledge to make better irrigation decisions.
This report summarises the major findings which have arisen from the project Knowledge Management in Cotton and Grains Irrigation. This report should be considered in conjunction with the detailed evaluation report prepared by Coutts JR consultants.
The lessons learned are detailed and recommendations provided where appropriate. They are discussed under the following headings:
Knowledge Management concepts and Extension methodology
This report details the research identifying the causes and the decline of soil structure under irrigation drippers in the Barossa Valley vineyards.
Irrigated vineyards in Australia have seen extensive adoption of drip irrigation. At the start of this project there was concern about the sustainability of drip irrigation based on previous field observations. Drip irrigation conserves water but the concentrated nature of its application was believed to cause serious soil structural (more)...
This project aims to assess soil structural decline under precision irrigation and to suggest management strategies to avoid it. The work so far has largely been confined to drip-irrigated vineyards in the Barossa Valley.
The FullStop Wetting Front Detector was designed to be a simple, inexpensive and robust device that gives a yes/no response to whether a wetting front has reached a particular depth. When searching for simplicity and low cost, tradeoffs need to be made with sensitivity; in the case of FullStop the decision was made to detect a 2 kPa strength wetting front.
From a theoretical perspective, the FullStop Wetting Front Detector is not well suited to furrow irrigation, deep placement, cracking (more)...
Water storages (reservoirs) play a vital role in the supply of water for irrigation farms, serving to smooth variation in supply and maximise the economic value of water over time.In Australia, major irrigation water storages are centrally managed via an announced allocation system. This publication discusses work undertaken to trial and evaluate two decentralised approaches - carryover rights and capacity sharing.
With recent advances in technology irrigators can now more precisely control delivery of mineral nutrients and water to the roots of perennial tree crops.
These technologies, collectively referred to as fertigation, provide the opportunity to adopt and implement highly technical management programs, such as open hydroponics, that use drip irrigation to deliver a balanced mixture of nutrients and water.
This research bulletin provides an overview of a project, (more)...
We combined samples taken during the project with those taken a decade ago to assess whether annual cycles of saline high SAR irrigation in summer and non-saline low SAR rain in winter had caused an increase in soil sodicity and salinity. Above average winter rain in 2011 reclaimed sodic and saline soils. This indicated that any change in soil structure wrought by a decade of these cycles was not yet a significant impediment to leaching of salts and (more)...
MEDLI® is a Windows® based computer model for designing and analysing effluent disposal systems for intensive rural industries, agri-industrial processors (e.g. abattoirs) and sewage treatment plants using land irrigation. It was developed jointly by the CRC for Waste Management and Pollution Control, the Queensland Department of Natural Resources and the Queensland Department of Primary Industries.
The redesign, refurbishment and automation of irrigation systems and their management is being driven by the need to:
improve the water use efficiency of irrigation supply systems by reducing losses, so making more water available for additional irrigation or other uses, including the environment;
improve the operational efficiency of irrigation supply systems through the rationalisation and automation of distribution, drainage and storage (more)...