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Lake Waikopiro

Tūtira and Waikōpiro are twin lakes located alongside SH2 north of Napier. These are culturally significant lakes as they were food and resting sites on an ancient Māori travelling trail. Waikōpiro flows into Tūtira under a narrow strip of land, and the two lakes are effectively one during high water levels. A DOC wildlife reserve and HBRC's regional park border the lake as well as private land. 

Waikōpiro is much smaller than Tūtira at 11 hectares and a depth of around 15 metres.  The lakes were formed by a land-slip at least 7,200 years ago.

The highly erodible catchment was enriched with phosphorus via aerial topdressing during the late 1940’s and 50’s. Water quality problems became apparent in the late 1950’s and both lakes have been prone to problematic cyanobacterial blooms for decades.

The nearby Tūtira Regional Park is a demonstration site for sustainable land management, and as well as enhanced wetlands, native bush and an arboretum, has a trial plantation of high UMF manuka; the aim is to find how well this scrub cover performs to improve water quality and provide a profitable crop on steep Hawke’s Bay hillsides.

An ongoing MPI-led project is aimed at eradicating the invasive macrophyte Hydrilla verticillata from Lakes Tūtira, Waikōpiro and Opouahi using grass carp. NIWA have been leading this work programme and are reporting promising results with minimal Hydrilla plants now present, and a recovery of the freshwater mussel population. 

 

A DOC wildlife reserve and HBRC's regional park border the lake as well as private land. 

Lake Summary
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  • Maximum depth
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  • Catchment size
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Scientific data for this lake

This dashboard shows information on the data collected by the regional councils for two lake water quality and ecological condition measurements. Lake SPI (Lake Submerged Plant Indicators) and TLI (Trophic Level):

  • Water Quality

    Trophic Level Index (TLI)

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    This measure is the Trophic Level Index (TLI). The TLI indicates the lifesupporting capacity of a lake and is based on four water quality indicators.

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    Trophic Level Index (TLI) history for this lake

    Trophic Level Indicator (TLI) which measures four parameters: water clarity, chlorophyll content, total phosphorus and total nitrogen. From these parameters a TLI value is calculated. In cases where water clarity data is missing a three parameter TLI is calculated. The higher the value, the greater the nutrients and fertility of the water which encourages growth, including algal blooms. As a rule, higher TLI scores mean poorer water quality. View a factsheet on TLI

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    TLI history for Lake Waikopiro
    Year
    TLI history for Lake Waikopiro data table
    Year TLI Score
    Year TLI Score

    What do the icons mean?

    VERY GOOD
    Very good water quality. Trophic Level Index of less than 2. Microtrophic lake conditions.
    GOOD
    Good water quality. Trophic Level Index of 2-3. Oligotrophic lake conditions.
    AVERAGE
    Average water quality. Trophic Level Index of 3-4. Mesotrophic lake conditions.
    POOR
    Poor water quality. Trophic Level Index of 4-5. Eutrophic lake conditions.
    VERY POOR
    Very poor water quality. Trophic Level Index of greater than 5. Supertrophic lake conditions.
    NO DATA
    No data available.
  • Ecological Conditions

    Submerged Plant Indicators (SPI)

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    The LakeSPI status describes the ecological condition of the lake and is based on plants present.

    LakeSPI data provided by NIWA

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    LakeSPI history for this lake

    LakeSPI (Lake Submerged Plant Indicators) is a method of characterising the ecological condition of lakes based on the composition of native and invasive plants growing in them. A higher LakeSPI percentage result is associated with better ecological health:

    LakeSPI N/A
    LakeSPI {{spiData.grades[0].Value}}%

    The overall LakeSPI score is calculated using a Native Condition Index ('good' plants) and an Invasive Impact Index (introduced, non-native plants):

    Native Condition N/A
    Native Condition {{spiData.grades[0].NativeIndex}}%
    Invasive Impact N/A
    Invasive Impact {{spiData.grades[0].InvasiveIndex}}%

    A higher Native Condition percentage is also good, but a higher Invasive Impact percentage is bad. View a factsheet on SPI

    • SPI %
    • Native Condition %
    • Invasive Impact %
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    LakeSPI history for Lake Waikopiro
    Year
    LakeSPI history for Lake Waikopiro data table
    Sample Date Status LakeSPI % Native Condition Index % Invasive Impact Index %
    LakeSPI information has been provided by NIWA.

    What do the icons mean?

    EXCELLENT
    Excellent ecological health. A LakeSPI score of 75-100%.
    HIGH
    High ecological health. A LakeSPI score of 50-75%.
    MODERATE
    Moderate ecological health. A LakeSPI score of 20-50%.
    POOR
    Poor ecological health. A LakeSPI score of 0-20%.
    NON-VEG
    Non-vegetated. A LakeSPI score of 0% (there are no plants present).
    NO DATA
    No data available.

Download Data

.ZIP file of lake data.
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Disclaimer

 LAWA Partners shall not be liable, whether in contract, tort, equity or otherwise, for any loss or damage of any type (including consequential losses) arising directly or indirectly from the inadequacy, inaccuracy or any other deficiency in information supplied irrespective of the cause.  Use of information supplied is entirely at the risk of the recipient and shall be deemed to be acceptance of this liability exclusion.

Sites

Monitored sites on Lake Waikopiro

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