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The Donnelly River is located in the south-west of Western Australia. An irrigation development has been proposed in the catchment that would extract water from the Donnelly River and store this in an off stream reservoir for irrigation use. Given the known issues related to non-stationarity and hydrological prediction, the Department of Primary Industries and Regional Development (DPIRD) contracted CSIRO to review the hydrological model that was used to estimate future climate streamflow in the Donnelly River. This model was owned and operated by the Department of Water and Environmental Regulation (DWER). The CSIRO review of the model, which also included future climate estimates, deemed the model generally unfit for its primary purpose of assessment of future water availability for diversion (Hughes 2021).

Subsequent to the review, DPIRD contracted the CSIRO to update the future streamflow estimates for the Donnelly River catchment. This report documents the construction, calibration / validation methods and results and data review used to constrain the model optimisations. It also includes the areas of uncertainty that are likely to have a significant impact on the model outputs.

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streamflow, modelling, rainfall-runoff, Donnelly River, south-west Western Australia


Agriculture | Hydrology | Sustainability | Water Resource Management


Preceding this work, the CSIRO was contracted to review the Donnelly River model, which was developed in 2018.


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