Environment, Local News

Proposed mowing reduction – Piha Lagoon

0 Comments 07 November 2014

West Coast Lagoon water quality- proposed mowing reduction

I received the following from Auckland Council.  Please read : important for reducing pollution in the Piha Lagoon

Auckland Council

Auckland Council

As you may already be aware, faecal contamination from a range of sources can sometimes result in the West Coast Lagoons becoming unsafe to swim in. In an attempt to have the lagoons un-signposted and safer to swim in, an Auckland Council working group has been set up with the aim to improve the water quality of the West Coast Lagoons. The attached Auckland Council working report “Karekare, Piha, North Piha and Te Henga Lagoons: What’s the problem?” published in June 2014, identified some of the biological sources of faecal pollution in the four west coast lagoons (a final report will be published online).

Of particular interest to Local & Sports Parks West (LSPW) are the high levels of waterfowl faecal matter in Piha and Te Henga Lagoons, and the dog faecal sources at Karekare and Te Henga lagoons. Birds especially, when they reach high numbers on the lagoon, appear to be a major culprit for at least some of the sign posting events. In addition, advice from the Department of Conservation is that the main attraction for ducks to Piha Lagoon will be from humans feeding them as there is not a large amount of natural food sources within the lagoon for ducks.

LSPW has been exploring options to reduce the amount of bird and dog faecal matter entering water bodies. One option that we would like to trial immediately is to cease mowing in areas that are currently mowed along the water’s edge at Piha Domain and Karekare Reserve. This approach is aimed at both creating a buffer to reduce the amount of run-off/ contaminants entering the water (both dog and bird faeces) and to reduce the areas where birds can be fed alongside the Piha Lagoon. We are aiming for this to be an adaptive trial, where a summer ranger will monitor the bird populations and lagoon edges. We intend to identify desire lines when accessing the lagoon for recreational uses and consider mowing these access routes if necessary. Invasive weeds establishment in these areas will also be monitored and removed if present.

The next scheduled mow for Piha Domain and Karekare Reserve was Monday 3rd November. Therefore we intend to cease mowing of these areas during the following round of maintenance on the 17th November.

Please note, other measures to improve water quality are also being investigated by the Auckland Council working group, including options to reduce the contribution from septic tanks and long drops in the catchment area.

Below are the areas we intend to cease mowing:

Karekare,  Piha Lagoon x 2.

StopMowing3       StopMowing1      StopMowing2


NOTE: Planting some native stream-side plants would help too !  We’ve planted Oioi which is renounced for filtering streamside water and providing a place for fish to lay eggs.

OioiApodasmia similis – Oratia Native Plant Nursery  

Elegant 1.5m. Feathery tufts. Ideal garden plant, very hardy and slow creeping. Swamp plant of saline and freshwater habitats.

The photo left was taken on the stream side of the Beach Valley Road Project and gifted to Oratia Native my us.

Have Your Say

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

© 2020 Piha Village Voice.