Misko Ivezich

Misko Ivezich

Misko is a stream restoration engineer who specialises in the interactions between hydrology, hydraulics,sediment transport processes and fluvial geomorphology. He enjoys working with stakeholders to find pragmatic stream and floodplain restoration solutions which improve river health and social outcomes.

Assessing stream condition to inform management to protect the Great Barrier Reef

The waterways within the Mackay-Whitsundays region typically drain the eastern slopes of the Clarke Connors Range before flowing east and discharging in the Great Barrier Reef Marine Park (GBRMP). Channel erosion and degraded riparian vegetation within these waterways are factors that contribute to significant sediment and nutrient loads to the GBRMP and provide poor habitat values for reef species. This study developed an understanding of the fluvial geomorphology, stream physical form and riparian condition through desktop assessments of spatial data and targeted field investigations. The outputs of the study can help identify priority reaches for management and help inform broader catchment management responses to protect the Great Barrier Reef and improve river health.

The Management of the Fitzroy River, Central Queensland

The Fitzroy River drains the largest catchment on the east coast of Australia and is a major source of fine sediment to the Great Barrier Reef. The lower Fitzroy River floodplains have been extensively modified to support grazing, horticulture and urban areas. Loss of floodplain and riparian vegetation is likely to have resulted in increased rates of meander migration in some areas. The lateral channel migration of the lower Fitzroy River impacts on these land uses and is also a significant source of fine sediment to the Great Barrier Reef.

This presentation explores the historical changes in river morphology, outcomes from stakeholder consultation and recommendations for the management of the river. Major river restoration works have recently been implemented to reduce loss of land and sediment loads entering the river system. The outcomes of these works and key learnings will be outlined.

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