Godley River
PHOTO: John Abel | Creative Commons

Introduction

Project River Recovery maintains and restores braided river and wetland habitat in the South Island’s upper Waitaki Basin for the benefit of its native plants and animals, some of which are only found in, or only breed in, this region.

Highlights

Project River Recovery's work includes intensive weed control, predator control, construction of wetlands, and research and monitoring programmes.

Project River Recovery was established in 1990, recognising the impacts of hydroelectric development on braided rivers and wetlands. The project is funded through a compensatory funding agreement with Meridian Energy Limited and Genesis Energy.

Read the Project River Recovery Strategic Plan for 2012-2019.

In this section

Weed control

Exotic weeds are being controlled over 33,000 ha of riverbed, to maintain and restore native plant communities and wildlife feeding and breeding habitat. Russell lupin, broom, gorse, wilding conifers and crack willow are key weed species that Project River Recovery targets in braided rivers. Highest priority is given to preventing weed invasion of the near pristine ‘upper rivers’ above the Basin’s uppermost hydro lakes.

Project River Recovery runs an eradication programme for yellow tree lupin and buddleia in the upper Waitaki Basin. It also runs an ongoing surveillance programme to spot any new invasive weeds that could threaten braided rivers.

Project River Recovery also carries out research that aims to improve how weeds are managed in braided rivers. One recent trial tested the effectiveness of a new more environmentally-friendly herbicide for use on Russell lupins around waterways. A second trial examined the viability of Russell lupin seeds in relation to their stage of seed pod development when herbicide is applied, to determine whether our weed control operations can effectively be extended to later in the season. The results of both trials are currently being analysed.

Predator control 

Project River Recovery and the Kakī Recovery Group are working together to test a catchment-wide predator trapping regime in the Tasman River. This project involves a range of predator control and monitoring techniques.

The breeding success of several braided river birds – wrybill/ngutu pare, banded dotterel/pohowera and black-fronted tern/tarapirohe – is being monitored over five years to assess whether this level of predator control is helping these birds.

Project River Recovery is also working on developing an effective localised predator trapping regime to protect black-fronted tern/tarapirohe colonies. The regime is being trialled on a tern colony on an island in the upper Ohau River, and if successful there it will be tested on riverbed colonies.

Wetland construction 

Ruataniwha wetland.
Ruataniwha wetland

Around 100 ha of new wetlands have been created. Water levels in these wetlands are controlled by weirs to maximise feeding habitat for braided river birds during the breeding season.

These wetlands also provide habitat for specialised wetland bird species like the Australasian bittern/matuku and the marsh crake/koitareke. 

Working together

Project River Recovery’s research and management work is complemented by a public awareness campaign, aimed at increasing knowledge and respect for braided rivers and their unique wildlife.

This includes giving talks to school and university groups and working closely with Meridian Energy, Genesis Energy, Ngaï Tahu, regional and district councils, riverbank neighbours and others.

Contact

Te Manahuna / Twizel Office
Phone:   +64 3 435 0802
Address:   Wairepo Road
Twizel 7901
Email:   twizel@doc.govt.nz
Full office details
Back to top