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A new study conducted at Bonnie Doon Creek on the lower Burdekin River in Queensland has demonstrated a significant reduction in sediment yield through large-scale remediation of alluvial gullies. The findings are published in the journal International Soil and Water Conservation Research.

The research, led by Associate Professor Andrew Brooks from Griffith University's Coastal and Marine Research Centre, used a Before After Control Impact (BACI) design field experiment, to measure the effectiveness of Great Barrier Reef (GBR) water quality improvements that can be achieved through targeted gully remediation.

The study focused on four large alluvial gully complexes, covering an active area of approximately 17 hectares.

The remediation efforts resulted in a remarkable reduction of 96%-99% in fine sediment yield within one year, translating to an annual reduction of approximately 5,500 tonnes from just these four gullies.

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