Mauri Compass Assessment of the Mimitangiatua & Haehanga Awa

Marlene Benson

Ann Maree McKay

Simone Shivnan

Wolfgang Kanz

Ian Ruru

Cover Image:

The full name of the Mimi River is Mimitangiatua. The river was also known as Te Wai o Mihirau. Mihirau was an ancestress of the Te Kekerewai hapū and was a prominent woman of her time. The name Te Wai o Mihirau is referred to in the Ngāti Mutunga pepeha:

'Mai Te Wai o Mihirau (Mimi River) ki Te Wai o Kuranui (Urenui), koia tera ko te whakararunganui taniwha'.

Suggested citation:

Benson, M., McKay, A-M., Kanz, W., Shivnan, S., Ruru, I. (2022). Te Rūnanga o Ngāti Mutunga Mauri Compass Assessment of the Mimitangiatua and Haehanga River. Prepared by Te Rūnanga o Ngāti Mutunga. Urenui, Aotearoa New Zealand.


Table of Contents

  • Executive Summary

Executive Summary

In 2020, Ian Ruru and his sons Riaki and Manawa helped us to apply the Mauri Compass tool and to undertake assessments of the Mimitangatua and Urenui awa, being two of our four tupuna awa (the others being the Onaero and Waitara). The project was sponsored by Te Wai Māori Trust.

Benson, M., McKay, A-M., Ruru, M., Ruru, R., Ruru, I. (2020). Te Rūnanga o Ngāti Mutunga Mauri Compass Assessment of the Urenui River and the Mimitangiatua River. Prepared for Te Wai Māori Trust by Te Rūnanga o Ngāti Mutunga. Urenui, New Zealand.

The Mauri Compass values and recognises the skills and knowledge that Ngāti Mutunga whānau have – ngā taonga tuku iho. We found that the tool used a good balance of mātauranga Māori and science data collection. We embraced the tool as a way to monitor effect of resource consents on the mauri of our awa, and to support our involvement in Resource Management Act processes.

Assessment Purpose

Present findings of Mauri Compass assessment of the Mimitangiatua and Haehanga catchments

Legal Challenge

Express aspirations of Te Rūnanga o Ngāti Mutunga in Environment Court case against Remediation New Zealand

For the purpose of our involvement in the Environment Court hearing on the Remediation New Zealand consent applications (Environment Court Case ENV-2021-AKL-000059) we have used the Mauri Compass tool to evaluate the Haehanga catchment.

The outcomes of the Mauri Compass assessment were based on Ngāti Mutunga mātauranga articulated through hui and wānanga, and anchored with reference material including the Ngāti Mutunga Iwi Environmental Management Plan.

Three of the twelve Mauri Compass indicators focus on the health and well being of our freshwater sentinel taonga, the tuna. We visited four sites on the Mimitangiatua awa (for our 2020 Report) and four sites in the Haehanga stream (in 2022).

Poor water quality in the Mimitangiatua, linked to water pollution across the catchment, has resulted in an all-encompassing rāhui within lower parts of the catchment (including harvesting of fish, shellfish, and undertaking swimming and recreation).

Key Findings: Haehanga Awa Assessment

Key findings from this updated Mauri Compass assessment are located in Table 3. In these findings we have compared the mauri of the Haehanga with the mauri of the Mimitangiatua. These two waterbodies are integrally linked. While the mauri of both the Mimitanguatia and Haehanga awa has steeply declined since European settlement, the Haehanga awa has fared the worst.

-100%

Chemhazards

Complete chemical pollution

-100%

Taonga Species Health

Total decline in species health

-100%

Mahinga Kai

Complete loss of traditional practices

-94%

Taonga Species Abundance

Near extinction of native species

With specific reference to the Haehanga awa and in comparison to pre-European times, all 12 Mauri Compass indicators have been profoundly impacted to the following extent:

  • Chemhazards (-100%)
  • Taonga species health (-100%)
  • Mahinga Kai (-100%)
  • Taonga species abundance (-94%)
  • Taonga species richness (-80%)
  • Biohazards (-80%)
  • Tikanga (-80%)
  • Wairua (-80%)
  • Habitat (-68%)
  • Ngāti Mutunga Connection (-60%)
  • Biodiversity (-45%)
  • Catchment health (-37%)

The mana of the Haehanga has been severely trampled on, with that catchment subject to extensive physical alteration and discharge of pollution into surface and ground waters. This is an affront to Ngāti Mutunga.

It is apparent that the chemical pollutants (Chemhazards) emanating from the RNZ site set off a chain reaction impacting on Ngāti Mutunga taonga species, their health and abundance. This in turn prohibits our ability to nurture and practice mahinga kai thereby impacting on our spiritual and cultural obligations as kaitiaki of our tupuna awa.

This scale of transformation and impact on the mauri of the Haehanga awa is particularly abhorrent to Ngāti Mutunga. Ngāti Mutunga attribute the demise to the operation of the RNZ site.

WHIRIA TE TANGATA, WHIRIA TE KAUPAPA, WHIRIA NGĀ TAONGA TUKU IHO


Introduction

Ko wai koe? Ko wai ahau? He puna koro puna ka heke mai, ka tuku ki a tukia e te poa ka kore e mimi tika koro puna ka koro puna ka koro puna


Ngāti Mutunga descends from a number of ancestors who lived in the area occupied today by ngā uri o ngā tūpuna o Ngāti Mutunga. These ancestors include Tokauri, Tokatea, Mihirau, Heruika, Pūrakino, Rakaupounamu, Uenuku (son of Ruawahia), Hineweo, Hinenō, Te Hihiotū, Kahukura, and Mutunga.

Waka Arrivals

Ngāti Mutunga also descends from ancestors who arrived on the Tokomaru, Tahatuna and Ōkoki waka such as Taitaawaro, Manaia and Ngānganarūrū.

Traditional Rohe

The traditional rohe of Ngāti Mutunga is indelibly etched into both physical and historical landscapes, spanning approximately 63,200 hectares.

Waterway Boundaries

Within these boundaries lie the Mimitangiatua, Urenui and Onaero catchments, with their mainstem and supporting river valleys providing important linkages.

Over generations, the descendants of these tūpuna intermarried and became generally known as Ngāti Mutunga.

The Papatiki stream signals the interface with Ngāti Tama in the North. From here, the stream flows past Titoki pa and then outlines the extremities of tūpuna mana as far north as the Mangahia Stream from which an easterly direction is struck to Huanui, then northeast to Waitara-iti. The rohe then finds a natural eastern definition in the Waitara River as the river flows southward to the Pouiatoa precinct.

From here, the border extends further south and then northwest along the Taramoukou stream to a point where the Waitara river connects with the Makara Stream. The confines of manawhenua are then traced in a northerly direction, skirting slightly west of the Poukekewa, Poutotara, and Pukemai streams. The Mangahewa Stream then provides an outline for the duration of the course to the coast.

Tupuna Awa - Whakapapa

Our three Tupuna awa, Onaero, Urenui and Mimitangiatua are prominent features of our whenua, culture, and everyday lives. Another name for Mimitangiatua is Te Wai o Mihirau. As mentioned previously, Mihirau is one of our very early and respected ancestors from whom many of our people descend.

Mai Te Wai o Mihirau (Mimi River) ki Te Wai o Kuranui (Urenui), koia tera ko te whakararunganui taniwha

The mainstems and supporting river valleys and catchments of our Tupuna awa also provide important linkages and resources in all directions across the rohe. The area of the Ngāti Mutunga rohe described above is approximately 63,200 hectares (156,000 acres).

1

Pre-European Era

Ngāti Mutunga iwi was an autonomous, independent and self-governing confederation of hapū including Te Kekerewai, Ngāti Hinetuhi, Ngāti Aurutu, and others.

2

Traditional Governance

These hapū exercised tino rangatiratanga over the traditional rohe, with distinct communities managing their territories.

3

Modern Unity

In more recent times, Ngāti Mutunga has interacted as a single tribal grouping known today as Ngāti Mutunga.

Mission of Te Rūnanga o Ngāti Mutunga

Understanding Values

Promoting an understanding of Ngāti Mutunga values & responsibilities in our rohe

Environmental Protection

Protecting the environment for future generations

Kaitiaki Role

Demonstrating Ngāti Mutungatanga through our role as kaitiaki

Figure 1: Mātauranga Māori, intergenerational transfer of knowledge.

Our Iwi Environmental Management Plan

Our IEMP is a mandated set of policies that codifies Ngāti Mutunga values to support and educate iwi members working on environmental issues. The IEMP has a legal effect under the RMA and should influence external agencies to work more closely and effectively with Ngāti Mutunga in environmental management within our rohe.

01

Capacity Development

Continue to develop our capacity to engage in environmental issues

02

Rangatahi Education

Encourage our rangatahi to take an interest in and pursue studies in relevant environmental fields

03

Environmental Monitoring

Look for opportunities to involve our people in environmental monitoring

04

Collaborative Partnerships

Work with other iwi groups on issues of mutual interest


Figure 2: Our Iwi Environmental Management Plan. Ngāti Mutunga values become embedded in the planning documents and management practices of relevant agencies

Kaitiakitanga, Tino Rangatiratanga and the Treaty of Waitangi

Effective Involvement

Ngāti Mutunga is effectively involved in the management and protection of natural resources

Understanding & Respect

Agencies responsible for environmental management understand and respect the role, value, and responsibilities of Ngāti Mutunga

Partnership Development

Partnerships between Ngāti Mutunga and agencies responsible for environmental management are developed and enhanced

Capacity Building

Agencies foster the capacity of Ngāti Mutunga to engage in environmental management, particularly decision-making processes and planning

Environment

Holistic Management

Natural and physical resources are managed in a holistic and integrated way

Cultural Restoration

The state of the natural environment is restored to a state which supports the values and customs of Ngāti Mutunga

Life-Supporting Capacity

The life-supporting capacity of the environment is protected and supported

Active Involvement

Ngāti Mutunga is actively involved in the day-to-day management of the environment

Enhanced Capacity

Ngāti Mutunga capacity to engage on environmental issues and participate in activities such as environmental monitoring is enhanced

Social, Economic, Health, and Well-being

Health Protection

All plans, policies, strategies, regulations, laws and other methods of environmental regulation or planning identify and avoid negative effects on the health and wellbeing of the Ngāti Mutunga community

Community Belonging

Establish a sense of belonging and kaitiakitanga amongst the whole community

Intergenerational Continuity

The kaitiakitanga tradition of Ngāti Mutunga is continued through the generations

Te Puna Waiora

The traditions of Ngāti Mutunga describe the cultural, historical, and spiritual association of Ngāti Mutunga and the waterways in our rohe. For Ngāti Mutunga, these areas represent the links between our tūpuna and, present and future generations. This history and relationship reinforce tribal identity, connections between generations, and confirms the importance of freshwater to Ngāti Mutunga.

The Onaero, Urenui, Waitara, and Mimitangiatua awa are specifically described in the Ngāti Mutunga Iwi Environmental Management Plan, including reference to the resources provided, taonga, pā, kāinga, taupā (cultivations), and kōiwi along riverbanks. The role of rivers as transport waterways is noted.

Physical Health

Restoring the physical health of rivers and waterways

Spiritual Health

Re-establishing spiritual connections with our awa

Relationship Restoration

Re-establishing the relationship between people and rivers

Access & Education

Ensuring access to waterways and educating others about their importance

Ngāti Mutunga used all parts of the Mimitangiatua catchment, as this was a key corridor from the coastal plain into the hinterland, with tracks along and across catchments, all the way to the Waitara and Whanganui awa. The rivers and streams were our highways and roads, providing travel up and down waterways both for collecting kai and engaging with whānau.

Mana whenua practised mahinga kai throughout, using the deep and wide waters and tauranga waka of the Mimitangiatua awa and its floodplains, and using the unique and varied resources and sustenance offered by its contributing catchments.

Cultural Values

Water is descended from Papatūānuku and Ranginui; it is the lifeblood of the people because it sustains the growth of plants, animals, and people. Our children play and bathe in the rivers in our rohe, and many sites of significance are located along waterways. Water has spiritual qualities of mauri and wairua. These qualities are related to the physical wellbeing of the water and are damaged by overexploitation, pollution, or misuse of water.

Water is often seen as a commodity, but we see water as a taonga to be valued and respected. It is part of our whakapapa and our health – if the water is sick then so are we.

Our tūpuna had considerable knowledge of the ways in which to use the resources associated with water, and tikanga for the proper and sustainable use of these resources. We did not pollute our waters. It is our responsibility, as kaitiaki, to ensure that the values and tikanga, as well as the water itself, is restored, endures, and is passed on to future generations.

1

Historical Settlements

Awa (rivers) in the rohe were and still are central to the social, spiritual, and physical lifestyle of the Ngāti Mutunga people. Many pā are located along the rivers, testament to the occupation of the area by our tūpuna.

2

Mahinga Kai Practices

Ngāti Mutunga utilised the entire length of each awa for food gathering. The river mouths provided pipi, pūpū, pātiki, kahawai, and other fish. Tuna and piharau were found in the upper reaches.

3

Traditional Knowledge

Our tūpuna had considerable knowledge of whakapapa, traditional trails and tauranga waka, places for gathering kai and other taonga, and tikanga for proper resource utilisation.

The Onaero, Urenui, and Mimitangiatua have been occupied by the tūpuna of Ngāti Mutunga since before the arrival of the Tokomaru and Tahatuna waka. The Haehanga is a sub-catchment of the Mimitangiatua, located 14.5km from this river mouth, approximately 4km from the coastal plain.

Not widespread throughout the North Island, piharau are an important and personalised way for Ngāti Mutunga to practice manaakitanga.

Te Puna Waiora Objectives

Understanding & Significance

Help ourselves and others understand the significance and value of the water within our rohe

Cultural & Ecological Values

Ensure that any use of water maintains the cultural and ecological values associated with water

Healthy Waterways

Ensure waterways are healthy and support Ngāti Mutunga customary activities

Ngā Take – Issues

Crown Recognition

Lack of Crown recognition of iwi ownership of rivers, leading to an inability of iwi to develop, use and protect water resources

Participation

Lack of Ngāti Mutunga participation in freshwater management

Special Significance

Lack of recognition of the special significance of particular waterways to Ngāti Mutunga

Mauri & Wairua

Lack of protection of the mauri and wairua of waterways

Monitoring

Lack of monitoring of and information on the health of waterways in our rohe

Restoration

Lack of restoration of the health and productivity of waterways

Sustainability

Lack of knowledge about whether current and future uses of water are sustainable

Sacred Sites

Lack of protection of wāhi tapu and wāhi taonga associated with waterways

Rivers and Streams

Our people have seen great changes in our rivers over the years. Our tūpuna were sustained by the rivers; they provided many resources, especially food. They were also key transport routes.

The changes to these rivers have degraded their mauri and wairua, and we now find that they cannot sustain us. In addition, many of the traditional practices associated with our rivers are no longer able to be practiced. Many of our kai species have disappeared, and the physical appearance of the rivers has changed beyond recognition.

Restore Health

Restore the physical and spiritual health of the rivers

Re-establish Relationships

Re-establish the relationship between the people and the rivers

Community Education

Educate others in the community about the importance of the rivers in our rohe

This 'Mauri Compass Project', is another example of how we are working towards these objectives.

Tiki Ngārangi demonstrating that the rangatahi of today will be the rangatira of tomorrow.

The Mimitangiatua awa

Figure 4: The Mimitangiatua River.

The full name of the Mimi River is Mimitangiatua. The river is also known as Te Wai o Mihirau. Mihirau was an ancestress of the Te Kekerewai hapū and was a prominent woman of her time. The name Te Wai o Mihirau is referred to in a Ngāti Mutunga pepeha:

Mai Te Wai o Mihirau (Mimi River) ki Te Wai o Kuranui (Urenui), koia tera ko te whakararunganui taniwha

Pā and Kāinga

There are many pā and kāinga located along the banks of the Mimi River. These include Mimi-Papahutiwai, Omihi, Arapawanui, Pukekohe, Toki-kinikini, and Tupari.

Taupā (Cultivations)

There were also a number of taupā (cultivations) along the banks of the river, supporting the communities that lived there.

Famous Warriors

Arapawanui was the pā of Mutunga's famous grandsons Tukutahi and Rehetaia. They were both celebrated warriors, especially Rehetaia.

The Mimitangiatua River and associated hūhi (swampy valleys), ngahere (large swamps), and repo (muddy swamps) were used by Ngāti Mutunga to preserve taonga. The practice of keeping wooden taonga in swamps was a general practice of the Ngāti Mutunga people for safekeeping in times of war.

To the people of Ngāti Mutunga, all the rivers and their respective valleys are of the utmost importance because of their physical, spiritual, and social significance in the past, present, and future.

Ngāti Mutunga sees the welfare of the people and the welfare of the water as interlinked.

"Without healthy water you won't have a healthy rohe. And without a healthy rohe you can't have healthy people" – Jamie Tuuta, Chairman, Te Rūnanga o Ngāti Mutunga.

The Haehanga awa

The Haehanga is a part of the Mimitangiatua. It is one of the large sub catchments after leaving the coastal plain on the way up the Mimitangiatua. This awa would have offered valuable resources and respite to mana whenua travelling up and down the Mimitangiatua, and whānau harvesting mahinga kai.

This would have been particularly so where the Haehanga joins the Mimitangiatua, and likely quite a way upstream in the Haehanga. The confluence of the Haehanga and Mimitanguatua was a pā tuna (Sam MacDonald, pers. comm).

Strategic Location

The Haehanga valley was particularly close to Pukekahu Pā and would have been a key mahinga kai area for those whānau.

Transport Route

The Haehanga was also on the way downstream when travelling to the Mimitangiatua estuary, a key mahinga kai area for us.

Waka Travel

Waka would have travelled up and down the Mimitangiatua, within the estuary and coastal plain, and beyond, along its gently meandering lowland path.

Figure 3: Recorded tracks in the vicinity of the Haehanga.

The Haehanga historically had extensive wetlands and a network of healthy smaller waterways and floodplains that would have offered a wide range of resources for mana whenua. Wetlands and floodplains offer a wide variety of resources for tangata whenua, from fruiting riparian tree species to materials associated with flax and raupo, to kōura that inhabit and thrive in smaller upland streams and an abundance of birdlife.

In my opinion, having viewed historic aerial imagery the Haehanga Stream would once have provided habitat (in the form of connected wetlands, floodplain, and forested headwaters) for giant kōkopu, banded kōkopu, īnanga, smelt (in the lower reaches), redfin, common and Cran's bullies and abundant tuna (of both species), with kōura and kākahi also likely abundant.

Evidence in chief to Environment Court of Kathryn McArthur, dated 14 April 2022.

While there are no records of pā and kāinga along the banks of the Haehanga, its strategic location and abundance of resources would have made this catchment valuable to mana whenua.

Historical Tracks and Travel Routes

Figure 4: Pukekahu Pā location and tracks.

Mahi Tamariki and Te Aroha – Urenui Pa c1920

Kia ū koe ki tō marae, mā tō marae ka kiia koe he tangata
Hold fast to your marae, for it is your marae that makes you a whole person.

Figure 5: Historic tracks and travel routes along the Uruti and Mimitangiatua awa.

Haehanga Catchment Transformation Over Time

This collage shows the degradation of values over time in the Haehanga catchment.

Figure 6: Haehanga aerial photo collage (1943, 1982, present day).

1

1943 - Natural State

The catchment was still largely natural, with meandering waterways including associated wetlands and floodplains. Some areas of ngahere had already been changed into pasture for livestock.

2

1982 - Moderate Change

While the extent of pasture had increased, the majority of waterways remained within their natural alignments, with associated natural wetlands and floodplains.

3

Present Day - Severe Impact

Large scale changes have taken place since Remediation NZ and its predecessor started operating in this river valley. The taiao has been severely impacted.

Remediation New Zealand

Here is a map of the Remediation NZ site at Uruti.

Figure 7: Remediation NZ Uruti Site Map.

The Remediation New Zealand facility represents a significant industrial operation within the Haehanga catchment. The site processes various waste materials including:

Organic Waste Processing

Composting operations handling various organic materials and byproducts

Industrial Waste

Processing of drilling wastes, sawdust, and other industrial materials

Contaminated Materials

Handling of materials that pose environmental and cultural risks to the waterway

The operation of this facility has had profound impacts on the mauri of the Haehanga awa, as documented through our Mauri Compass assessment. The facility's activities have created both point source and diffuse pollution that affects water quality, aquatic life, and the cultural values that Ngāti Mutunga hold for this waterway.

Mauri Compass Whakataukī

The founding principles of the Mauri Compass are based on this whakataukī:

Protect and strengthen the realms of the land
Protect and strengthen the realms of the sea
And only then will they protect and strengthen the people

The Mauri Compass was designed to assess the mauri of any waterway and was refined over a significant period of time with the input of Tairāwhiti mātauranga Māori and science experts including:

Gisborne District Council

Water Quality Enhancement

Technical Advisory

Wastewater Technical Advisory Group

Te Runanga o Tūranganui a Kiwa

Iwi leadership and guidance

Council Staff

Staff at the Gisborne District Council

The Mauri Compass dashboard is designed around the 12 indicators [attributes] that inform the mauri of a particular waterbody. It is also designed to visualise the complex interrelationships in a straightforward manner.

The Twelve Mauri Compass Indicators

Each of the twelve indicators are outlined next.

In our 2020 Mauri Compass Report for the Urenui and Mimitangatua rivers, we were also trained up as accredited Mauri Compass assessors so that we can continue to monitor our mauri restoration projects.

Figure 8: Mauri Compass 'ringa raupā' from the 2020 assessment.

Mauri Compass Training and Community Engagement

Figure 9: Marlene Benson & Barry Matuku demonstrating eDNA-testing at Uruti School.

Taranaki Regional Council staff enthusiastically attended the Mauri Compass training that we hosted in 2021. It was an excellent opportunity to bring together western science and Ngāti Mutunga mātauranga.

Figure 10: Taranaki Regional Council Mauri Compass training.

Knowledge Sharing

The training provided an opportunity to share mātauranga Māori with council staff and demonstrate the practical application of the Mauri Compass tool.

Building Partnerships

These sessions helped build understanding and working relationships between Ngāti Mutunga and regional authorities.

Integrating Knowledge Systems

The collaboration demonstrated how traditional knowledge and western science can work together effectively in environmental monitoring.

This collaborative approach has been essential in building credibility for the Mauri Compass methodology and ensuring that our cultural values are recognised in formal environmental assessment processes.

Applying the Mauri Compass as an Assessment Tool

Assessment Context

Ngāti Mutunga has been doing freshwater surveying for approximately four years now and we have trialled a couple of different cultural monitoring tools.

For us, the Mauri Compass had a good balance of mātauranga Māori and science data collection. This will make it easier to be recognised by Taranaki Regional Council and the New Plymouth District Council while still putting Ngāti Mutunga cultural values and concerns first.

1

Tuna as Taonga Species

Using tuna as a major taonga species built on the knowledge that Ngāti Mutunga whānau have about the customary uses, gathering and protection of a taonga species.

2

Recognising Expertise

The survey values and recognises the skills and knowledge that Ngāti Mutunga whānau have – Ngā taonga tuku iho.

3

Intergenerational Involvement

The Mauri Compass method involved Ngāti Mutunga whānau aged from 2 to 70 plus and it will be easy to involve the whole Ngāti Mutunga whānau during any future surveying.

Assessment Purpose

The purpose was to use the Mauri Compass tool to assess the mauri of the Mimitangiatua and Haehanga rivers utilising mātauranga Māori and the practice of mahinga kai at eight key sites, four on the Mimitangiatua and four on the Haehanga.

This will increase everyone's skills in the collection of scientific data while recognising and affirming the cultural knowledge and expertise and experience of Ngāti Mutunga whānau participating in this work. It also helps to reconnect us and/or strengthen our relationships as tangata whenua to our whenua, our awa and ngā mātua tupuna.

Mātauranga Māori and Survey Methodology

Mātauranga Māori

Through wānanga, we began by answering a set of questions and calculating scores based on our knowledge of our tupuna awa. We calculated scores for the historic or pre-European state and for the current state for the Mimitangiatua and Haehanga. Each set of questions feed into the twelve indicators that form the Mauri Compass.

Mahinga kai survey methodology

Wolfgang Kanz and Ian Ruru joined us for an initial site visit with RNZ representatives on December 9th, 2021. The method, data, equipment, and skills required were discussed in depth and a survey plan was confirmed. We also identified four Mauri Compass testing sites for the Haehanga catchment.

01

Bottom End Assessment

The bottom end of the Haehanga Catchment, close to the Mimitangiatua

02

Upper Catchment

Near the top of the catchment, as permitted by water depth at that time of year

03

Adjacent to RNZ

Adjacent to the Remediation NZ operation, in close proximity to ponds

04

Downstream of Operations

At the downstream end of the bulk of the Remediation NZ operation

The four Haehanga sites were selected to enable a holistic assessment of the catchment.

Haehanga Catchment Testing Sites

Figure 12: Haehanga catchment testing site images.

The raw scores from our wānanga were entered into a Microsoft Excel spreadsheet with algorithms and used to generate bar charts and dashboards. The bar charts and dashboards provided excellent visual reminders of the mahi that we have to do to restore the mauri of our tupuna awa. We also cross-referenced and ground-truthed our scores with local reference material.

Figure 9: Uruti School

A drone video was produced in 2020 to highlight our rohe and mahi, our 'ringa raupā' in action and on location. We had a very enjoyable time.

Mauri Compass Mahinga Kai

Mahinga kai is about mahi ngā kai – the way we gather resources, where we get them from, how we process them, and what we produce. These places, processes, and skills are an essential element of Ngāti Mutungatanga. Our tūpuna were able to feed, clothe, and house themselves using the resources provided by Papatūānuku.

European settlement completely disrupted traditional mahinga kai cycles by destroying habitat (for example, by clearing forests and draining wetlands) and introducing species which eat or outcompete native species (for example, possums, cats, trout). The confiscation of land also separated Ngāti Mutunga from our traditional resources, leaving us unable to live from the land as our tūpuna did.

Historical Abundance

Waterways were once an important source of mahinga kai, providing diverse food sources for our people

Current Decline

As the years passed we have seen a marked decrease in the availability of mahinga kai

Species Loss

Some of our customary food sources are not available at all, while other species, once plentiful, have become scarce

Cultural Impact

Our ability to undertake cultural customs and practices has been eroded through limited or no access to our tūpuna awa

Furthermore, water quality has made it unsafe for contact, both in terms of Western science health risks and cultural objections to the contaminants in the water.

Ngāti Mutunga understands the importance of protecting and preserving these species and our awa, our customs and practices, and we should be able to practice mahinga kai sustainably and safely within our rohe according to our tikanga.

Objectives (IEMP)

Retain Traditions

To retain our traditions around mahinga kai, and pass those traditions on to future generations

Improve Health

To improve the health of our waterways to a state where they can support mahinga kai

Survey Method and Cultural Parameters

Rawiri McClutchie, Riaki Ruru, Ann Maree McKay, Te Araroa McKay demonstrating textbook net-setting techniques (2020).

All nets were unbaited, set perpendicular to the stream, and retrieved the next morning. The image also lists the cultural and environmental parameters that are recorded.

Site Information

  • Site location and date
  • Time and participants (ringa raupā)
  • Moon Phase / Maramataka

Environmental Conditions

  • Weather and past rainfall
  • Wind conditions
  • Water temperature (°C)

Water Quality Parameters

  • pH and clarity (cm)
  • Conductivity (SPC uS/cm)
  • Dissolved Oxygen (DO%/L mg/L)

Species Assessment

  • Tuna - totals and other species
  • Tuna description (species and length)
  • Comments and observations

To that end we:

  • encourage collaborative research and monitoring projects between Ngāti Mutunga and scientists that address customary use issues using both Mātauranga Māori and mainstream science
  • support the development and use of cultural indicators to assess water quality
  • encourage the restoration of water bodies to the highest quality possible in terms of traditional uses
  • visited twelve mahinga kai sites, four on the Urenui awa, four on the Mimitangiatua awa (2020), and four on the Haehanga stream in 2022
  • shared the historical significance of each site
  • recorded information on the water quality of our rivers
  • learnt about our freshwater taonga species
  • ensured the spiritual safety of our 'ringa raupā' through karakia
  • ensured the physical safety of our 'ringa raupā' through our health and safety procedures and protocols

Mahinga Kai Species Assessment

The following table lists aquatic mahinga kai species that were considered in our assessment, comparing historical presence with current status in both the Mimitangiatua and Haehanga waterways.

Coastal/Estuarine Species

Inland/Freshwater Species

Comparative Analysis of Mimitangiatua and Haehanga

The Mauri Compass was used to compare the following states:

Mimitangiatua River

Pre-European versus current state assessment

Haehanga Stream

Pre-European versus current state assessment

The outcomes of the Mauri Compass work were derived from Ngāti Mutunga mātauranga Māori articulated through hui and wānanga and anchored with reference material such as the Ngāti Mutunga Iwi Environmental Management Plan.

It also enabled our iwi members to upskill themselves in the long-term monitoring of our tupuna awa.

Figure 14: Map of Mimitangiatua (2020) and Haehanga (2022) sites.

This map shows the locations of our assessment sites across both waterways, enabling direct comparison of conditions and trends. The strategic placement of monitoring sites allows us to understand the full impact of various activities on the mauri of these important awa.

Comprehensive Assessment

The comparative approach allows us to understand the relative impacts on different parts of our rohe and identify priority areas for restoration.

Long-term Monitoring

These baseline assessments provide the foundation for ongoing monitoring of restoration efforts and environmental changes.

Mātauranga Integration

The process successfully integrated traditional knowledge with scientific methodology to create a holistic assessment framework.

Mauri Compass Results & Discussion

This section presents the Mauri Compass Results, and an in-depth Discussion as to how the indicator scores were derived. It is arranged as follows:

01

Indicator Comparison Table

Comparison of Mimitangiatua and Haehanga indicators with detailed comments

02

Bar Chart Analysis

Visual comparison of indicators between the two waterways

03

Dashboard Comparisons

Mauri Compass Dashboard comparisons showing complex interrelationships

04

In-depth Discussion

Detailed analysis of each of the 12 indicators with comparative insights

The comprehensive results reveal the severe impact on the mauri of both waterways, with the Haehanga showing particularly concerning declines across all indicators.

Mauri Compass Indicator Comparison

The following table provides a comprehensive comparison of all 12 Mauri Compass indicators between the Mimitangiatua and Haehanga waterways, showing the dramatic decline from pre-European times to current conditions.

It is apparent that the chemical pollutants (Chemhazards) emanating from the RNZ site set off a chain reaction impacting on Ngāti Mutunga taonga species, their health and abundance. This in turn prohibits our ability to nurture and practice mahinga kai thereby impacting on our spiritual and cultural obligations as kaitiaki of our tupuna awa.

Mauri Compass Bar Chart Comparisons

Figure 15: Bar Chart comparing Mimitangiatua and Haehanga indicators.

Key Observations from Bar Chart Analysis

Haehanga Scored Significantly Lower

The Haehanga scored significantly lower than the Mimitangiatua across most indicators, demonstrating the severe impact of the RNZ operations.

Cultural Persistence Despite Challenges

While Ngāti Mutunga are holding on to their mātauranga and strive to undertake their customs and practices across their rohe, this is not possible across large parts of their rohe.

Haehanga Cultural Unavailability

The Haehanga has been both inaccessible and is culturally unavailable as a resource because of the tapu imparted on the awa by Remediation NZ.

Critical Differences

10x

Biohazards Increase

Order of magnitude increase in faecal indicators between upper Haehanga and below RNZ site

0%

Chemical Safety

Chemical hazards score showing complete contamination from RNZ operations

1hr

Pollution Travel Time

Flow time from Haehanga to Mimitangiatua Estuary - insufficient for pathogen die-off

Biohazards are significantly worse in the Haehanga. Faecal microbes and pathogens are introduced to the Haehanga Stream from the waste brought onto the Remediation NZ site, including animal, bird and fish offal, skins, manures, and paunch waste.

Chemical Hazards are significant in the Haehanga Stream because of diffuse and point discharges of waste from Remediation NZ. Concentrations of contaminants in the Mimitangiatua downstream of the Haehanga confluence are elevated for some contaminants.

Mauri Compass Dashboard Comparisons

Dashboard Analysis: Visualizing Complex Relationships

The dashboards play a key role and are designed to visualise the complex inter-relationships between indicators in a straightforward manner.

Chemhazards Impact

Chemical pollution from RNZ operations creates the foundation for all other impacts

Biohazards Effect

Biological contamination compounds the chemical impacts, making water unsafe

Taonga Health Decline

Poor water quality directly impacts the health and survival of taonga species

Abundance Reduction

Unhealthy conditions lead to dramatic reductions in taonga species numbers

Mahinga Kai Loss

Without healthy, abundant species, traditional food gathering becomes impossible

Kaitiaki Impact

Inability to practice mahinga kai affects Ngāti Mutunga's role as kaitiaki

Key Dashboard Insights

Chain Reaction Effect

For the Haehanga awa, the detrimental impact of Chemhazards and Biohazards on Taonga Health and Taonga Abundance creates a cascading effect

Cultural Disconnection

The lack of Taonga Abundance directly affects the abundance of Mahinga Kai species, breaking cultural connections

Kaitiaki Responsibilities

The inability to practice Mahinga Kai traditions directly affects the ability of Ngāti Mutunga to exercise their role as kaitiaki

The visual representation clearly shows how environmental degradation in the Haehanga has created a web of interconnected impacts that extend far beyond simple water quality measures to affect the very essence of Ngāti Mutunga cultural identity and responsibilities.

Discussion: Detailed Indicator Analysis

The outcomes of the Mimitangiatua and Haehanga Mauri Compass Assessments provide detailed insights into the specific impacts on each indicator. This analysis compares the current state of both waterways and explains the reasoning behind each assessment.

Tangata Whenua Connection

Mimitangiatua (45%)

After discussion, Ngāti Mutunga whānau recognised that people had a stronger connection to the Urenui than the Mimitangiatua, mainly due to ease of access to Urenui – especially the river mouth and estuary.

Haehanga (40%)

Connection affected by lack of access (pre-RNZ) and concerns about RNZ activities negatively impacting the health of the Haehanga and mahinga kai within the site.

V1_3 Update: Increased Concerns

Site Complexity

Large complicated site operating under 4 different companies, over 21 years with inadequate information about site activities/standards/goods received

Management Standards

Low standard of management and inadequate resourcing observed during early site visits

High-Risk Materials

Type of goods received have high risk of contamination - drilling waste, treated sawdust, contaminated soil

Volume Issues

Volume of material and leachate has led to excessive nitrogen loading of irrigation areas

Long-term Contamination

Treated sawdust was on site for approximately 15 years before being identified as major contamination source

Most Ngāti Mutunga whānau reported concerns with changes they observed downstream from the Haehanga in the main stream of the Mimitangiatua, including concerns that water was no longer safe to drink and monitoring reports stating water was not suitable for stock and never safe for immersive contact.

Conclusions and Recommendations

This report has amended the original Mauri Compass assessment of the Mimitangiatua and Urenui awa, for the purpose of providing evidence to the Environment Court Case ENV-2021-AKL-000059 Remediation NZ Ltd v Taranaki Regional Council. The Haehanga Catchment has been added and Urenui Catchment removed. The report therefore integrates information relevant to the Haehanga, and reports on changes in mauri specific to that catchment.

Ongoing Pollution Risk

The proposal by Remediation NZ cannot guarantee that discharges of pollution will cease, and the poor compliance track record validates this concern.

Perpetual Effects

The effects will continue in perpetuity unless the site is remediated, and the mana is returned to the awa.

Restoration Imperative

Only through comprehensive remediation can the mauri of the Haehanga be restored for future generations.

A key reason for the failure of regional plans to protect freshwater is that hard science is seen to be the only legitimate way to articulate impact. Attempts to articulate the impact of water management on human well-being are constantly marginalised by the promotion of hard scientific knowledge regarding assessments. People's connections to particular places and environments are overlooked.

(Hammond, 2018, p. 26)

Our Obligations as Kaitiaki for the Haehanga

That in the long term the Haehanga is returned to the state it was pre-European – in the shorter term it is returned to the state it was pre the composting site now owned by Remediation New Zealand being there.

Species Restoration

Taonga species richness and health is restored to sustainable levels

Water Safety

Water is safe to drink and the awa is suitable for cultural purposes and bathing

Ecosystem Health

Riparian margins contain diverse plant, bird, and insect life with pest numbers at target levels

Food Production

Soil adjoining the awa is safe to grow, harvest and eat kumara from

Forest Restoration

Continuation of native forest restoration in the catchment as per present planting programme

The Mauri Compass assessment has provided a comprehensive framework for understanding the current state of these important waterways and charting a path toward restoration. Through continued monitoring and collaborative effort, we can work toward restoring the mauri of the Haehanga and protecting the cultural and environmental values that are central to Ngāti Mutunga identity.

WHIRIA TE TANGATA, WHIRIA TE KAUPAPA, WHIRIA NGĀ TAONGA TUKU IHO

Weave the people, weave the purpose, weave the treasures handed down