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Porangahau Estuary

The Pōrangahau Estuary is one of the least modified estuaries on the east coast. It is formed behind a large un-vegetated inshore bar, and breaks through at one or more locations along the bar to meet the sea. The Pōrangahau Estuary is recognized as a nationally significant wildlife habitat. The estuary supports the second largest number of indigenous bird species in Hawke’s Bay and provides nursery and feeding habitat for many fish species.

Estuary summary

What makes my estuary unique?

Explore the characteristics of this estuary

Overview

Estuary characteristics

  • Significant features
    • One of the least modified estuaries on the east coast.
    • Nationally significant wildlife habitat.
    • Supports the second largest number of indigenous bird species in Hawke’s Bay
    • Several patches of seagrass (Zostera muelleri) discovered in the estuary in 2018
    • Listed as a Significant Conservation Area under the Regional Coastal Environment Plan
  • Total area
    226 hectares
  • Total shoreline length
    24 km
  • Tide
    Spring 1.4m
  • Key rivers
    • Pōrangahau River

Highlighted reports

These links are from your regional councils and unitary authorities and provide additional information about this estuary

State of the Hawke's Bay Coastal Marine Environment: 2013 to 2018 A baseline survey of the indigenous bird values of the Hawke's Bay coastline Estuarine Trophic Index Susceptibility Screening for Hawke's Bay

Related factsheets

For more details on particular topics see these factsheets

Understanding estuaries Estuary types

Department of Conservation

Want to connect with restoration groups or explore your local estuary? You can find more information on the DOC’s interactive maps.

Restoring estuaries map Experiencing estuaries map

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.

Porangahau River

4 sites

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.

Porangahau River

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
 Monitored sites 1

Select a monitored site from the list below

...retrieving sites.

No sites found.

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