Tongariro River Videos

Tongariro River Video 2026

In April 2026, we conducted a helicopter survey of the Tongariro River from the delta to Waikato falls. This followed a similar survey which we conducted in April 2023, in the aftermath of Cyclone Gabrielle. The survey was done with the aid of a chartered helicopter and professional videographer.
Aside from giving a stunning panorama of the beautiful, world-renowned river which we all cherish, it showed no significant changes to the river since the previous survey.
The previous survey highlighted a substantial number of fallen pine trees on the river-bed / flood plain below the Rangipo bridge as a result of cyclone Gabrielle.
These could potentially cause a blockage if they moved to the wrong position in a subsequent flood. While there has been some migration, they appear to be relatively stable after the two 700 cumec floods last winter. Waikato Regional Council are also
monitoring these after any major floods, since we brought it to their attention.
Other than that, the video highlights the continuing expansion of willow and wilding pine infestation, which is a concern from an environmental and aesthetic perspective, as well as limiting angler access. We have recently discussed this again with DOC, who are well aware of the issue, and are aiming to take remedial steps.
However, it is not straightforward as it involves a number of land-owners and stake-holders, and in the case of willows, to be of any lasting benefit, eradication needs to start at the top of the river to prevent seed migration. We have offered financial support if required.

Tongariro River video 2023

Background
In April 2023 the Advocates for the Tongariro River undertook an aerial survey of the river from the delta to Waikato Falls with the aid of a chartered helicopter and professional photographer. The purpose was to assess the state of the river particularly with respect to the spread of invasive vegetation, and also the extent of fallen trees in the aftermath of cyclone Gabrielle. We were concerned not only about the environmental impact, but also the increased flood risk that these factors could pose.

Highlights
Aside from providing an excellent panorama of the beautiful world renowned river that we all cherish, the video highlights a number of issues:

  • Starting at the delta, the video shows a material number of semi-submerged trees which pose a hazard for boats trying to navigate up the river.
  • Moving up to the middle reaches we can see the spread of invasive vegetation (e.g. willow,broom, buddleia) and also wilding pine, both on the edges and islands of the riverbed. This vegetation has increased significantly in recent years to the point that it will require major intervention to bring back under control.
  • In the upper reaches we can see the damage caused by cyclone Gabrielle, in particular the large number of fallen pine trees on or adjacent to the riverbed. Aside from the potential consequences if these were to be washed down river in a major flood event, it adds weight to the importance of the control of wilding pines in this environment going forwards. It is notable that the native bush has withstood the cyclone comparatively well.

Action taken so far

Since analysing the video we have:

  • Engaged with the Waikato Regional Council catchments management team, the Department of Conservation, and the Harbourmaster (re delta area).
  • Submitted feedback on the WRC’s Annual Works Programme for the flood protection scheme (a copy of which can be found in the Key Documents section of this website).
  • Agreed to assist with funding for DOC’s weed and wilding pine eradication work, and the replanting of low growing plants in the cleared areas.

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