Coastal Management

We're lucky to have some of the most beautiful and pristine beaches in New Zealand, if not the world, on the Coromandel, that's why we've adopted an ambitious programme to work with all stakeholders to manage the effects of climate change.

Our Shoreline Management Plan open days 2021

If you missed the open days, you can still find out what’s next and tell us what you think by completing our online survey here before Friday 26 February.

Click here for more information on our Shoreline Management Plans.

Making progress on our coastal erosion maintenance

We’ve reassessed the damaged beach accessways at Pauanui and Whangamata following the severe erosion over the winter months.

Beach accessways improvement work following the erosion over the winter months will start on Monday 19 October in Whangamata and Tuesday 20 October in Pauanui.

At Pauanui, beach accessway 9 is going to be made shallow to remove the sharp drop to the beach (similar to the picture right).

Accessways 10 and 13 are going to be realigned and reshaped to improve and make the access safer. The section of beach from accessways 10 to 13 (around Mount Vista Pl) will remain fenced off due to the steep scarp. We will look at reshaping and replanting at the end of summer along this section as we need the beach to build back up to provide good foundation for replanting.

Pauanui proposed Hoggin path walkway and dune zone extension 

  • You can view the proposed plan here and the detailed presentation including the projected budget costs here. The proposed walkway and dune zone extension will run along the coastal reserve fronting properties 17 to 23 Bonanza Place and 18 to 26 Champion Place.
  • Staff explained the proposal in detail which includes planting and encourages people to stay on the track to protect the dunes and hope other areas will see the benefit of this future proofing work.
  • They Board has requested there also be further public feedback.

In Whangamata we’ve met with DOC to come up with an agreed approach to the damaged accessways opposite Graham St (including access 8). The northern damaged accessway will be reshaped make the gradient shallower and the current structures will be removed and replaced with mulch and handrail. The accessway just to the south will remain closed over summer to allow for the beach to build back up to provide good foundation for replanting.

Photo above: Whangamata Beach Access 8.

We're experiencing continued coastal erosion around our open East Coast beaches, with Whangamata, Pauanui, Tairua, Whangapoua, Mercury Bay, Cooks Beach among the notable spots.

"This is continuing as a result of back-to-back storms we’ve had since the beginning of June," says our Coastal Scientist Jamie Boyle. "As well as this, we’ve identified 14 sites around the district that require monitoring and consideration of mitigation alternatives to the ‘living with nature’ approach,” he says.

We will be considering how these issues and sites are best addressed through the upcoming Coastal Panel workshops associated with the Shoreline Management Plans.

Jamie explains more on why this happens to our dunes which you can read below.

“Coastal erosion is a district wide issue and the costs are significant to do any type of hard and soft work structures,” says our Mayor Sandra Goudie. “Protecting and enhancing the dunes we have left is critical to the future of beaches and existing beachfront properties.”

The options we have to react to coastal erosion are many and invariably costly.

"Our Council can’t just go in and do works as and when it sees fit," says Jamie. "As well as construction costs, there’s also consenting and consulting costs that have to be managed, and unless we can prove that critical infrastructure is at risk (parks and sand dunes don’t count as critical infrastructure), then the process can take a very long time."

Here's some indicative construction estimates for an 80m section of foreshore:

Dune erosion chat with our Coastal Scientist

Due to the recent storm events our dunes have eroded in Whangamata (pictured right), Pauanui and Whitianga. Our Community Facilities team are monitoring the areas.

"The current dune erosion is completely natural and the active dune that has lost sand is doing exactly what it should be doing and providing a buffer for wave energy," says Jamie Boyle our Coastal Scientist.

  • During long periods of settled weather, sand builds up on the visible part of the beach, including the dune. However, short-term erosion can happen during storms, as waves erode the beach and the dunes closest to the sea. This often leaves a near vertical cut in the face of the dune (an ‘erosion scarp’) as shown by the diagram below. The eroded sand is carried offshore into the surf zone, where it forms shallow bars that help absorb storm wave energy.
  • Significant dune erosion can occur in just a few hours, but full sand dune and beach recovery can take years.
  • After the storm, the beach area repairs itself first before the dunes can recover. Gentler wave action moves sand back to the shore, slowly rebuilding the beach. Dry sand is then blown further inland and trapped by sand binding vegetation to repair the eroded dune. The diagram on Waikato Regional Council's website shows how dunes are repaired following beach recovery.
  • Natural dune repair depends on a good cover of native sand binding grasses, such as spinifex and pingao, to trap moving sand.
  • Erosion through climate cycles sees shorelines on Waikato beaches move naturally over periods of decades, with the largest changes usually seen near estuary and river entrances. Though periods of erosion can continue for years, in most cases it is not permanent. When viewed over a long period, such as a hundred years, the shoreline is simply shifting backwards and forwards.

Waikato Regional Council have some great resources on dune erosion available here.

Diagram: Erosion scarp during a storm.

Coastal Management Strategy

Our beaches are one of the major reasons for people coming to visit and live here. But keeping them in such magnificent condition comes at a cost, given the effects of climate change, storm events and other natural processes. 

In 2018, our Council adopted the Coastal Management Strategy, which sets out a range of initiatives we will be taking over the coming years to better manage our coastal assets and understand the risk of coastal inundation and coastal erosion. The 2018-2028 Long Term Plan includes $2.6 million over three years to help us implement this strategy. 

This approach to coastal management activity ensures a district-wide approach, allowing us to better-manage our coastline from a holistic and long-term perspective. We work together public and private organisations such as the Waikato Regional Council, New Zealand Transport Agency (NZTA), the Department of Conservation, iwi and community groups with an interest in coastal protection.

‘Coastal management’ encompasses a wide range of projects to identify hazards and risks and develop Shoreline Management Plans to combat these, with a view to building ‘resilient’ coastal communities.

The CMS was adopted by Council in June 2018. You can download the strategy on the top right-hand-side of this page.