Restoring our waterways - Sustainability - University of Canterbury - New Zealand


Restoring our Waterways

The UC campus waterways project aims to restore the ecology and diversity of the three waterways flowing through University of Canterbury's Ilam campus – the Ōtākaro/Avon, Waiutuutu/Okeover and Kā Waimaero/Ilam streams - for all to enjoy. A range of collaborative restoration projects have involved University of Canterbury general and academic staff, students, Christchurch City Council, and Environment Canterbury.

Background

The Ōtākaro/Avon, Waiutuutu/Okeover and Kā Waimaero/Ilam streams all flow through the University of Canterbury. Together, they represent a sub-catchment within the Christchurch city and are distinctive landscape features of the university campus.

Why the need for rehabilitation?

Ilam Stream c. 1920's
Ilam Stream c. 1920s (photo: W.A. Taylor Collection, Canterbury Museum).

Up until the 1990s, drainage by European settlers of what was predominantly wetland and the increasing development of Christchurch had degraded waterways in the city, including the three waterways flowing through the University. With increasing urban development and creation of impermeable surfaces such as roads and houses, many of the natural groundwater springs have dried up. Meanwhile stream flows have been supplemented by artificial inputs, for example, car park runoff and building discharges which have inherently poorer water quality. Grassy lawns and exotic deciduous trees had replaced native forest and wetland vegetation alongside the campus streams, while building developments and the traditional maintenance practices of mowing lawn to the edges of stream banks and clearing aquatic vegetation from the streambeds have resulted in extensive in-stream siltation. The combined effect of all the above factors has been a loss of aquatic and riparian habitat, a decline in plant and animal species diversity, and an overall loss of intrinsic natural character.

Restoration initiatives have taken place on both the Ōtākaro/Avon and Waiutuutu/Okeover streams. These projects have also had a spectrum of social goals, including raising awareness and appreciation within the University and the local community of the campus streams; enhancing people’s understanding of the streams’ physical processes, species, communities, and ecosystem functioning; and increasing participation in developing the vision for the waterways.

The UC Waterways project 1997-2001

planting along Okeover StreamIn 1996, a student initiative led to what a collaborative waterways project involving academic and general staff of the university, students from the campus environment club, and the Christchurch City Council. The project aimed initially to revegetate the banks of the Ōtākaro/Avon streams to attract native birds and provide a ‘green corridor’ linking areas of native bush in the vicinity. However, as the project developed, its aims broadened to the current overall goal of restoring the ecology and diversity of all three waterways for all to enjoy. Since then, much of the restoration focus has been on the Waiutuutu/Okeover stream.

UC Waterways and Campus Master Plan (2015)

The UC Campus Master Plan (2015) presents a significant opportunity to re-visit the restoration of waterways on UC campus. The Sustainability Office has developed a UC Waterways: Issues and Options document which is intended to inform the campus master plan. It

  • provides background information about the history of the three waterways flowing through the University of Canterbury campus
  • examines some key issues and risks associated with these waterways within a wider contemporary context, including Ngāi Tahu/ Te Ngāi Tūāhuriri perspectives.
  • identifies significant potential opportunities for UC, which includes improving the ecological health of the waterways and how doing so could contribute positively to a wider Christchurch and Canterbury context.
  • outlines past interventions undertaken on the waterways and a series of proposed interventions yet to be considered or completed.

UC Waterways stakeholders

waterways core team members A wide range of stakeholders have an interest in UC waterways. These include

  1. Te Ngāi Tūāhuriri as mana whenua
  2. UC Sustainability Office (Engineering Services)
  3. UC Grounds (Engineering Services).
  4. Staff and students from the Freshwater Ecology Research Group (School of Biological Sciences) and the Hydrological and Ecological Engineering Group (Civil Engineering). UC staff and students play a crucial role, including guiding the scientific basis of the restoration, monitoring the waterways to document physical and ecological changes following rehabilitation efforts, and integrating campus waterways issues into relevant courses and research.
  5. UC Waterways Working Group.
  6. Christchurch City Council
  7. Environment Canterbury.

The UC Waterscape Action Group

Membership of the UC Waterscape Action Group (2016) consists of:

Tom Cochrane (Chair) Associate Professor, Hydrological and Ecological Engineering Group
Jenny Webster-Brown Professor, Director of Waterways Centre for Freshwater Management
Katie Collins PhD Student, School of Biological Sciences
Darryl Cone Grounds Supervisor, Engineering Services
Jon Harding Professor, School of Biological Sciences
Nigel Harris Ngāi Tūāhuriri, Māori Research Kaiārahi, Ngā Tahu Consultation and Engagement Group
Angus McIntosh Professor, School of Biological Sciences
Katie Nimmo UC Sustainability Office
Dr Frances Charters Civil and Natural Resources Engineering
Dr Aisling O'Sullivan Adjunct Senior Research Fellow, Civil and Natural Resources Engineering

UC Waterscape Action Group Terms of Reference

  • Sustainability Office
    University of Canterbury
    Private Bag 4800
    Christchurch 8140 
    New Zealand
  • sustainability@canterbury.ac.nz
    Phone: +64 3 369 5503 or +64 3 369 5575
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