Lecturer will talk on whether Canterbury’s problem waterways can be rehabilitated

A free public lecture at Canterbury University at 7pm next Wednesday will focus on the problems facing Canterbury’s fresh waterways.

The address will be delivered by Professor Angus McIntosh, one of the leaders of the team of freshwater ecologists involved in the Canterbury Waterway Rehabilitation Experiment (CAREX). The team has been working to test solutions for important in-stream problems in lowland Canterbury waterways associated with intensive agriculture.

The group has worked closely with farmers and other stakeholders to trial solutions in nine kilometres of waterways.

Professor McIntosh will outline CAREX findings so far. These highlight the need for channels to be protected from their source (“start at the top”) and for measures to prevent contaminants bypassing the protection system (or “prevent leaky plumbing”).

Work tackling three important stressors, fine sediment deposition, excessive weed growth and high nutrients, is now focusing on promising solutions including bank re-shaping, sediment traps, targeted shading and bioreactors for nutrient removal.

Professor McIntosh is the Mackenzie Foundation Chair of Freshwater Ecology in the School of Biological Sciences at the University of Canterbury. He is also a Principal Investigator in the Centre for Integrative Ecology at UC and a member of the Waterways Centre for Freshwater Management and he is involved in the Biological Heritage National Science Challenge.

Register to attend at: www.canterbury.ac.nz/ucconnect

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