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Restoring our waterways

06 October 2023
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The UC campus waterways project aims to restore the ecology and diversity of the three waterways flowing through 91制片厂's Ilam campus 鈥 the 艑t膩karo/Avon, Waiutuutu/Okeover and K膩 Waimaero/Ilam streams - for all to enjoy. A range of collaborative restoration projects have involved 91制片厂 general and academic staff, students, Christchurch City Council, and Environment Canterbury.

Background

The 艑t膩karo/Avon, Waiutuutu/Okeover and K膩 Waimaero/Ilam streams all flow through the 91制片厂. Together, they represent a sub-catchment within the Christchurch city and are distinctive landscape features of the university campus.

Why the need for rehabilitation?

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 艑t膩karo/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鈥檚 understanding of the streams鈥 physical processes, species, communities, and ecosystem functioning; and increasing participation in developing the vision for the waterways.

The UC Waterways project 1997-2001

In 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 艑t膩karo/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聽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聽Waterways - Issues and Options聽document which is intended to inform the campus master plan.聽

  • It provides background information about the history of the three waterways flowing through the 91制片厂 campus.
  • Examines some key issues and risks associated with these waterways within a wider contemporary context, including Ng膩i Tahu/ Te Ng膩i T奴膩huriri 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.

This work has informed the聽UC Watershed and Waterways Plan 2017-2023, a document designed to support the UC Campus Masterplan with respect to its goals related to UC Waterways.

UC Waterways stakeholders

A wide range of stakeholders have an interest in UC waterways. These include:

  1. Te Ng膩i T奴膩huriri as mana whenua.
  2. UC Sustainability Office (Facilities Services)
  3. UC Grounds (Facilities Services).
  4. Staff and students from the聽Freshwater Ecology Research Group聽(School of Biological Sciences) and the聽Hydrological and Ecological Engineering Group聽(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聽courses and research.
  5. UC Waterways Action Group.
  6. Christchurch City Council.
  7. Environment Canterbury.
The UC Waterways Action Group

Membership of the UC Waterways Action Group (2021) consists of:

NameDepartment
Ed ChalliesWaterways Centre for Freshwater Research
Dr. Frances ChartersCivil and Natural Resources Engineering聽
Darryl ConeGrounds Supervisor
Grant CraigHealth and Safety
Prof. Angus McIntoshSchool of Biological Sciences
Dr. Matt MorrisUC Sustainability Office
Prof. Tom Cochrane聽Civil and Natural Resources Engineering
Prof.聽Aisling O'SullivanCivil and Natural Resources Engineering

UC Waterways Action Group聽Terms of Reference

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