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Brooklands Lagoon/Te Riu O Te Aika Kawa

The Brooklands Lagoon/Te Riu o Te Aika Kawa is a tidal river lagoon that was formed from a stopbank realignment along the Waimakariri River in the 1930s. The eastern shore of the lagoon is separated from the Pacific Ocean by a sand spit up to 450m wide.

Pressures on the health of the estuary are from high sediment loads that come down the Waimakariri River and its tributaries, nutrient run-off from rural land uses, stormwater and industrial discharges, and recreational activities.

The benthic communities within Brooklands Lagoon/Te Riu O Te Aika Kawa are improving over time and are in 'fair' health.

An important coastal saltmarsh and estuarine ecosystem, Brooklands Lagoon/Te Riu o Te Aika Kawa is home to an abundance of native bird, fish, and plant species.

The area has significant cultural significance to mana whenua and is highly valued as a source of mahinga kai.

Estuary summary

What makes my estuary unique?

Explore the characteristics of this estuary


Estuary characteristics

  • Significant features
    • Formed in the 1930s from a realignment of the Waimakariri river using stop banks.
    • An important link in a chain of wetlands that runs along the central Canterbury coast.
    • Over 100 different types of birds have been spotted, including the rare white heron/kotuku and grey duck/pārera.
    • Provides a breeding habitat, wintering site and a feeding stop for birds migrating between the North and South Islands.
  • Total area
    170 hectares
  • Total shoreline length
    3.8 km
  • Flushing time
    0.5 days
  • Key rivers
    • Styx River/Pūharakekenui
    • Waimakariri River

What's happening upstream?

See results from monitored river quality sites influencing this estuary

River quality

What's happening upstream?

The physical characteristics and health of estuaries are influenced by the rivers and streams flowing into them. For instance, when it rains the mud and contaminants generated on land can be washed into rivers and eventually flow into the estuary. The health of our rivers and streams can therefore be very important for Estuary Health, and understanding the upstream pressures can help with interpreting estuary monitoring data.

Monitoring is undertaken for a range of river health indicators (e.g., water quality and ecology) in many catchments across the region. Where there are monitored river catchments that influence this estuary, these are shown below. You can click through to view monitoring results from these River Quality sites to see current state and how health has changed over time.

What surrounds my estuary?

See land cover information from monitored catchments that surround this estuary

Land cover

What surrounds my estuary?

The physical characteristics and health of estuaries are influenced by local geography and the way we use our land. This is because estuaries are the receiving environments for many of our land use activities. Land cover information can be used as an indicator of land use, therefore knowing the surrounding land cover can help us understand which pressures might be affecting Estuary Health.

Where there is land cover information available for nearby catchments, these are listed below. These figures show the types of vegetation and built or natural features that surround the estuary margins and the rivers that flow into this estuary. You can click through to the Land Cover topic to see these land cover classes broken down into further detail, and view changes over time.

Waimakariri River Catchment

What do the Broad Land Cover Classes mean?

Land cover information on LAWA is grouped into land cover classes at two levels of detail – broad and medium. For this overview we are showing the six broad-level classes for the catchment.

  • Forest

    Inclusive of; indigenous and exotic forest.

  • Scrub / shrubland

    Inclusive of; indigenous and exotic scrub / shrubland.

  • Grassland / other herbaceous vegetation

    Inclusive of; tussock and exotic grassland and other herbaceous vegetation.

  • Cropland

    Inclusive of; cropping / horticulture.

  • Urban / bare / lightly-vegetated surfaces

    Inclusive of; natural bare/lightly-vegetated and artificial bare surfaces, and urban area

  • Water bodies

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Monitored sites 1

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