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TANK Resources

You can find the latest information from the TANK plan change project on this page. Plus archived newsletters, meeting minutes and relevant reports.

The TANK group will be releasing a summary of the material covered in each meeting as Think TANK Bulletins. Any presentations provided at the meetings, as well as notes by the TANK members, can also be found on this page. You are encouraged  to read them and get familiar with what the TANK group is talking about.  Other documents and discussion points will be added as the project progresses.

Project Documents
ThinkTANK Newsletters
Other relevant reports

TANK Project Documents

These documents explain the TANK processes and timeframes it is operating to.

Draft TANK Plan v7 August 2018
The TANK Group held its last meeting on 26 July 2018, but the work of the TANK Plan Change continues.  A Draft TANK Plan was presented to the Regional Planning Committee for the first time on 14 August 2018.  The details of the draft Plan - once ‘workshopped’ by RPC members over the coming months - will lead to a final draft for public consultation and formal submission.

There were a handful of matters where the TANK Group was unable to reach consensus, requiring further review and consideration by the RPC.  These items of non-consensus are clearly highlighted, and the next iteration of the draft Plan will clearly show the Council’s position on these matters.

    TANK Group - Terms of Reference
TANK Interim Report
TANK Master Plan
TANK Values and Attributes (draft June2016)
TANK – Draft Implementation Plan

TANK Values - Te Ao Maori (2017)

Our latest newsletter

February 2018 - THIS IS TANK

Think TANK e-newsletter

Think TANK 24 newsletter - November 2018

Think TANK 23 newsletter - July 2018

Think TANK 22 newsletter - June 2018

Think TANK 21 newsletter - May 2018

Think TANK 20 newsletter - April 2018

Think TANK 19 newsletter - March 2018

Think TANK 18 newsletter - February 2018

Think Tank 17 newsletter - January 2018

Think TANK 15 newsletter - November 2017

Think TANK 14 newsletter - October 2017

Think TANK 13 newsletter - September 2017

Think TANK 12 newsletter - August 2017

Think TANK 11 newsletter - July 2017

Think TANK 10 newsletter - June 2017

Think TANK 9 newsletter - April 2017

Think TANK VIII newsletter - March 2017

Think TANK VII newsletter - February 2017

Think TANK VI newsletter - December 2016

Think TANK V newsletter 15 November 2016

Think TANK IV newsletter 20 September 2016

Think TANK III newsletter 30 August 2016

Think TANK II newsletter 22 July 2016

Think TANK I newsletter 7 July 2016


Mtg 40 - 31 May 2018

Receive information about the Draft Drinking Water Source Protection
Receive the Tutaekuri Values report
Draft Plan - Identify areas of consensus and understand the solutions and alternatives being sought

Meeting Notes

Mtg 39 - 19 April 2018

1.Water Quality Objectives – Attribute States
2.Agree management framework and policy direction for sediment and contaminant management

  • Farmer Reference Group Proposal
  • Nutrient Management

Meeting Notes

Mtg 38 – 22 March 2018
Agree lowland stream depletion management
• Stream flow enhancement
• Riparian land/wetland management
• Allocation limit and re-allocation of water
Agree on high flow allocation management framework and policy direction
Receive initial economic modelling results
Reduce the number of management scenarios for economic modelling
Receive update from Mana Whenua working group

Meeting Notes

Mtg 37 – 22 February 2018
Agree to stormwater and urban water management framework
Understand Tutaekuri Values
Agree stream depletion management
• Steam flow Augmentation
• Ngaruroro storage scheme
• Riparian land/wetland management
Provide feedback on plan drafting

Meeting Notes
HDC Presentation
NCC Presentation

Mtg 36 – 30 January 2018
TANK Programme 2018 Update
Agree to proposed mapping of Zone 1 to incorporate in draft rule
Agree to application of proposed calculator in draft rule for stream depleting groundwater
Agree drafting instructions for water allocation and priority

Meeting Notes

Mtg 35 – 22 November 2017
Agree drafting instructions and recommendations for wetland management
Agree climate change policy
Agree recommendations for managing staged reductions
Understand economic modelling approach
Agree TANK monitoring plan and policy recommendations

Meeting Notes

Mtg 34 – 18 October 2017

Agree on allocation and flow management scenarios for further assessment for Ngaruroro and Tutaekuri Rivers
Discuss restriction regimes and agree next steps

Meeting Notes

Mtg 33 – 10 October
Agree on objectives for contaminant loads to the estuaries
Agree on desired attribute states
Discuss nutrient management approach(s) and agree next steps

Meeting Notes

Mtg 32 – 7 September 2017
Topics Covered:
Decide on the sediment management framework from the Farmer Reference Group and next steps
Decide on recommendations about farming systems from the Economic Assessment Working Group
Dedicated time for TANK Group members to discuss topics of their choice

Meeting Notes

Meeting 31 – 17 August 2017
Main topics covered:
Desired flow management targets for lowland streams
Flow augmentation (to manage groundwater depletion effects on the specified flows).
The management of surface water takes (lowland streams)
The management of Ngaruroro flows (the effect of ground water takes)
Managing groundwater levels
Farmer Reference Group report back

Meeting 31 Meeting Notes
Meeting 31 Slides

Meeting 30 - 27 July 2017
Main Topics covered:
Clive River flow and channel management options
Water Augmentation Working Group
Stormwater management
Further groundwater modelling results

Meeting 30 Meeting notes
Meeting 30 slides

Meeting 29 – 14 June 2017
Main Topics covered:
Summary of Groundwater Science
Water age in drinking water supply wells in Heretaunga aquifer
SOURCE model and Stormwater takes
Te Tua out-of-stream storage specs and modelling

Meeting 29 Meeting notes
Meeting 29 slides

Meeting 28 – 27 April 2017
Main Topics covered:
Recap of benefit to river from restricting stream depleting groundwater takes
Raupare flow augmentation scheme
Groundwater modelling results
On-farm economic assessment methodology

Meeting 28 Meeting notes
Meeting 28 slides

Meeting 27 - 22 March 2017
Main Topics covered;
Ahuriri State and Trends plus management options
Surface and groundwater modelling – stream depletion modelling results, effectiveness of pumping bans, mitigation options

Meeting 27 Meeting notes
Meeting 27 slides

Meeting 26 - 9 February 2017

Main Topics covered;
Iwi Engagement
Rivers, drains and modified watercourses
Flow regime management scenarios for modelling
Groundwater takes, stream depletion and spatial management

Meeting 26 Meeting notes
Meeting 26 slides

Meeting 25 - 13 December 2016

Main Topics covered
State of Karamu River
Values and attributes
Managing the main stressors (macrophyte growth, oxygen levels and temperature)
Managing the drainage and flood control in the Karamu catchment
Introduction to the Heretaunga Plains model

Meeting 25 Meeting notes
Meeting 25 slides

Meeting 24 - 4 November 2016

Main Topics covered
Groundwater quality – state and trends
Options for managing sediment loss

Meeting 24 Meeting notes
Meeting 24 slides

Meeting 23 - 20 September 2016

Main Topics covered
Results of SEDNET sediment loss modelling
Waitangi Estuary – state and trends
Manawhenua values to attributes research report

Meeting 23 - 20 September 2016 Meeting Notes
Report on Questions arising from Meeting 23
Slides from meeting 23

Meeting 22 - 9 August 2016

Main Topics covered
Ngaruroro and Tutaekuri values and attributes
Water quality state and choices for priority management action

Meeting 22 – 9 August 2016 Meeting Notes
Presentation – science presentation about Ngaruroro and Tutaekuri water quality

Other Meetings With Key People

The TANK Group pastoral farmer representatives, with the support of the Council and Beef and Lamb NZ, are working with farmers to involve them in the TANK project.  A number of public meetings were held across the TANK catchments in 2016 and early 2017.  A farmer reference group has now been established to help provide information and feedback to the TANK group.  A particular focus for the group will be on how to meet a target for reducing the amount of sediment (and associated phosphorous) lost as a result of land use activities and soil erosion.  More information about the group is available from Mary-Anne Baker ( Peter Kay (  and Ivan Knauf (

The meeting presentations and meeting notes are provided below.  Pastoral farmers are particularly encouraged to take an interest in this work.

Public Meetings

Meeting 1 – September 2016
The presentation is available here.

Meeting 2 – March 2017
The presentation is available here.

Farmer Reference Group Meetings

Meeting 1 – May 2017
Meeting notes

Meeting 2 – June 2017
Meeting notes (to come)

TANK Key Reports

Values & Impact Assessments

Ahuriri Estuary Cultural Values

Ahuriri: Estuary Contact Recreation and Food Gathering Review

Collaborative decision making for freshwater resources in the greater Heretaunga and Ahuriri Region (TANK Group Report 1 Interim Agreements)

Direct Economic Impacts Executive Summary

Economy-wide Impacts of Proposed Policy Options TANK catchments

Social and Cultural Assessment TANK Catchments (Power Point presentation) 

TANK Direct Economic Impacts FINAL

TANK Plan Change: Barriers and risks to the adoption of proposed mechanisms to coordinate management action

TANK Values - Te Ao Maori (diagram)

TANK Wider Economic Impacts (Power Point Presentation) June 2018

Modelling Water Restrictions and Nutrient Losses for Horticulture in the TANK Catchment - An Economic Analysis

Ngaruroro Values and Attributes Report

Part 2 of the TANK catchment Economic, Social & Ecological Impact Assessment: Water management & Land Management Policy Options

Water Quality & Ecosystems

Clive River Sediment

Effects of Urban and Industrial Stormwater Discharges in the Hawke's Bay Region State of Knowledge report

Groundwater Quantity - State of Environment 5 yearly report 2003-2008

Heretaunga Plains Aquifers: Groundwater Dynamics, Source and Hydrochemical Processes as Inferred from Age, Chemistry, and Stable Isotope Tracer Data

State of trends of River Water Catchments 2016

Sednet NZ Estimate sediment sources from TANK September 2016

Flows, Levels & Allocation

Ngaruroro River RHYHABSIM modelling update

Paritua/Karewarewa Stream - Hydrology

Heretaunga Aquifer Groundwater Model Scenarios Report final

GNS Science Heretaunga Modelling Uncertainty Runs Letter Report White 2018

Aqualinc Irrigation water demand land surface recharge assessment Heretaunga Plains

Surface water quantity scenario modelling in the Tutaekuri, Ngaruroro and Karamu

Addendum to fish habitat modelling for the Ngaruroro and Tutaekuri rivers

Biodiversity, fish, birds

Wetland Monitoring Review - A review of Hawke's Bay Regional Councils Wetland Monitoring

Tutaekuri, Ahuriri, Ngaruroro, Karamu cathments Riparian Assessment April 2014

Storage / Augmentation

Hawke's Bay Regional Council Te Tua Storage Scheme

Report Te Tua Storage Modelling Phase 1

Ngaruroro River High Flow Allocation June to November Period


The Estuaries of the TANK catchments: Ahuriri and Waitangi Estuaries, Values, State and Trends

Admin & Process

Greater Heretaunga and Ahuriri (TANK) Collaborative Stakeholder Group Terms of Reference

TANK Economic Assessments Working Group - Brief

TANK Engagement Working Group (EWG) Terms of Reference

TANK Masterplan - for the Greater Heretaunga and Ahuriri(TANK) Plan Change

Hawke's Bay Regional Resource Management Plan TANK Plan Change Document - Peer Review Findings

Draft TANK Plan - v7 August 2018


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