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Manawatu-Wanganui region

Groundwater Zone: Turakina Groundwater MZ

The total area of the Turakina GMZ is 1,982 square km, extending from south of Waiouru and Taihape to the coast near the mouth of the Turakina River. The estimated recharge of this zone is 221 million cubic metres per year, with approximately 1.7 million cubic meters currently allocated for use. Geologically, the Turakina GMZ is similar to the Whangaehu GMZ, with large potential for groundwater storage but limited availability of accessible groundwater throughout the catchment due to the low yield produced by the Tertiary sediments. Potential for usable groundwater is likely to be limited to alluvial gravel fill throughout the valleys however, potential for groundwater abstraction increases toward the coast where deep stratified sand and shell deposits are known to provide moderate-highly productive water-bearing strata.

Because of the low density of groundwater wells throughout the Turakina GMZ, knowledge of groundwater storage and availability is limited. Presently, annual allocation accounts for approximately 3.4% of the total annual allocable volume. Water use is primarily utilised for crop and pasture irrigation, with lesser volumes utilised for stock water and rural water supply. Groundwater abstraction has, in recent years, increased around the coastal margin of the Turakina area, while groundwater monitoring has shown a decline in seasonal spring recharge that extends across the boundary to the Rangitikei GMZ. This has lead to increased monitoring of groundwater levels in the coastal area to ensure current and future water allocation is sustainable. Further research is also underway to better inform development of groundwater resources in this area.

Water Use
Groundwater in this zone

Regional councils collect information about how much water is available and manage resource consents for those wishing to take water from groundwater supplies. Use the buttons below to view regional information on: how much water is available, where it comes from and how its used.


Groundwater available: {{waterSource.availableToAllocate}} Irrigation
Town supply
  • Groundwater in this zone
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    Groundwater in this zone

    Accurately estimating the total amount of water available in a groundwater management zone is not currently possible. Regional Councils are working with the Ministry for the Environment on the best way to calculate this figure. We will include these figures on LAWA when they become available. In the meantime, for more information about a particular groundwater management zone, contact your regional council.

    Total allocation is calculated as Daily Max Volume over 100 days for irrigation takes and Max Daily Volume over 365 days for all other uses. Estimated Annual Allocated Volume (EAAV) is calculated to determine a conservative maximum usage that may occur in a dry year and assumes that (1) for consents authorising abstraction during the irrigation season the EAAV can be calculated by assuming that, on average over a year, water is used for 100 days at 80% of the maximum consented daily abstraction rate; and (2) for consents for full year abstractions, the EAAV can be calculated by assuming that, over a year, water is used for 365 days a year at 50% of the maximum volume.

  • Water consents: How much water is consented and used?

    Groundwater available to consent

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    Consented water in this groundwater zone

    Use the tables below to look at how much water is available compared with how much is actually consented within this water management zone. Click the plus to expand subzones where available

    Comparing consents and use
    Amount available to consent In this groundwater management zone:
    {{}} {{}}
    available to consent
    Amount consented
    measured and non measured
    Amount used (measured)
    Amount Units Consented or used as a percentage of available
    Total available to consent {{}} {{}} {{}}
    Total consented {{}} {{}} {{}} {{}}
    Total consented and measured {{}} {{}} {{}} {{}}
    Total measured amount used {{}} {{}} {{}}
    Total measured volume used {{}} {{}}

    The table above shows the amount of water that is available for use compared to the amount that has been consented. The ‘Total Consented’ and ‘Total Consented and Measured’ fields are based on percentages of the ‘Total available to Consent’ field. If this field is not populated no data will be displayed. Some consents require actual use to be monitored and this is presented as 'Total measured volume Used' where available.

  • Water consents: How is consented water used?

    Consents by use in this groundwater zone

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    Consented water in this zone

    Overall annual volume for {{waterAvailable.year}}
    Relative breakdown
    Activity Percentage of total consented Total volume Number of consents
    {{item.displayText}} {{item.displayText}} - - No data available {{item.breakdownPercentage}}% {{item.totalVolume}} m3 {{item.numberOfConsents}}
    Total {{}}% {{}} m3 {{}}

    The above table shows the proportion of water consented for irrigation, industrial, stock, town supply and other. It excludes hydro electricity. In this region/management zone {{hydroUsage.totalVolume}} m3/year is consented for hydro-electricity and makes up {{hydroUsage.percentageConsented}}% of the total water volume consented for this region/management zone


Monitored sites in this Zone

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