CSIRO research is developing best land and water resource use options for the South-West irrigation district of Western Australia, to ensure maximum economic, environmental and social benefits.
The South-West irrigation district of Western Australia is predominantly used to grow pastures for dairying and beef.
In recent years, the annual water volume entering the district has declined and the marginal quality of water used for irrigation has led to increased waterlogging and salinity.
In addition, a mismatch between land capability, water supply and cropping patterns has meant the full economic potential of the area has not been realised.
Assessing land and water resources
CSIRO scientists are investigating the optimal use of land and water resources in the area for various agricultural and other activities.
The project is carrying out a number of assessments and evaluations to determine:
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land capability: developing maps containing data on landforms, soil properties, geophysics, pasture production, land values and identifying areas at risk of flooding, waterlogging and nutrient and salt affected areas
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water availability: assessing current and future surface water resources
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groundwater resources: assessing sustainable volumes for abstraction
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shallow groundwater risk: mapping the extent of fresh and saline shallow groundwater areas
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cropping/pasture/horticulture distribution: determining suitability of land for various agricultural activities and water requirements and availability
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economic analyses: to ensure maximum economic return and minimal environmental and social impacts
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key knowledge and research gaps: identifying issues to be addressed to improve overall system performance and economic efficiency.
Science for the future
The South-West irrigation area review will deliver:
CSIRO is determining the best uses of land and water resources in the South-West irrigation district through system analysis.
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surface and groundwater models to help improve surface and groundwater management and control surface run-off and nutrients
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improved water use efficiency for increased productivity and sustainability
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effective drainage strategies to help lower the shallow saline water tables and improve soil condition
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evaluation of economic opportunities that may result from better water quality, piped irrigation water and water trading.
Project partners
The Water for a Healthy Country Flagship works closely with a number of partners to deliver innovative solutions for land and water resource management.
CSIRO Divisions involved in this research include:
They are partnering with the following Western Australian agencies and organisations:
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Department of Agriculture (Western Australia)
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Department of Environment (Western Australia)
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Harvey Water
- Water Corporation (Western Australia)
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South-West Catchments Council.
Read about other Water for a Healthy Country Flagship research projects.
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