On unstable ground

Exploring landslide risks and management

Explore this field trip:

About this field trip

Aotearoa is a land of incredible scenery. The tectonic forces that have created our beautiful landscapes also make them prone to natural hazards such as earthquakes, volcanoes, tsunami and landslides. Of all these natural hazards, landslides are the most costly, causing more loss of life than earthquakes and volcanoes combined.

On this field trip, we’ll take you from urban Tahuna ❘ Queenstown to the rural Cromwell Gorge ❘ Tīrau and its famous Clyde Dam on the Mata-Au River. Expert geoscientists will guide you on this journey to explore different types of landslides, their causes, how to prepare for them, and what engineers do to manage their impacts.

Objectives

The objectives of this virtual field trip are to:

  • increase awareness and understanding of Earth’s dynamic systems and natural hazard processes

  • highlight the causes and effects of landslides and how they impact people and infrastructure

  • equip participants with the knowledge and skills to prepare for and respond to landslides.

Key learning

Through this field trip, participants will:

  • explore landslides and debris flows

  • understand what causes these hazards and how they affect communities

  • learn how geoscientists monitor, mitigate and respond to ongoing land movement and landslide events

  • discover how to prepare for an emergency and how to look after yourself and others.

Student-led inquiry

Empower your ākonga to take charge of their learning journey. Encourage them to ask meaningful questions, explore resources, and embark on their own journey of natural hazard preparedness.

Curriculum alignment

This virtual field trip aligns with the refreshed New Zealand Curriculum (2022). It covers a range of learning areas, predominantly science and social sciences. Access guidance that supports teaching and learning to align with curriculum goals. 

Be prepared – Stay safe – Understand your world

Join us on this LEARNZ adventure and become part of a generation ready to face natural hazards with knowledge, courage, and care.

This online field trip is generously supported by Natural Hazards Commission Toka Tū Ake

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Educator guide

This guide is designed to support teachers in aligning the LEARNZ On unstable ground virtual field trip with the goals, structure, and learning outcomes of The New Zealand Curriculum refresh. It outlines the key learning intentions, suggests cross-curricular links, and provides examples of teaching and learning opportunities that are meaningful, place-based, and action-oriented.

Learning objectives

The virtual field trip is designed to:

  • increase understanding of Earth’s dynamic systems and how natural hazards occur

  • explore the social and environmental impacts of landslides

  • develop ākonga knowledge and skills to prepare for and respond to landslides and other emergencies

  • empower student-led inquiry and action.

Curriculum vision and values

This field trip supports the vision of The New Zealand Curriculum refresh by helping ākonga to:

  • contribute confidently to communities that are informed and prepared

  • value the whenua, understanding place-based risks and histories

  • respect multiple knowledge systems, including mātauranga Māori and science

  • act with care and responsibility toward themselves, others, and their environment.


Curriculum learning areas and Mātauranga Māori

This field trip aligns with SDG 15: Life on Land. It emphasises the significance of terrestrial biodiversity, promoting awareness of conservation efforts at Sanctuary Mountain Maungatautari.

By fostering understanding of the interconnectedness between people and the environment, it contributes to the broader global goals of preserving and protecting life on land for sustainable development.

Stay updated

Join us on this educational adventure. Stay updated on our progress, news, and events related to the virtual field trip by following us on social media.

Discover more

Select a topic or image link for background information, images, narrations, and kupu Māori | key words for each topic.

What is a Landslide?
Patariki Grace Patariki Grace

What is a Landslide?

A landslide occurs when earth, rock, vegetation, mud, or dirt suddenly loses its grip…

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Landslide Triggers
Patariki Grace Patariki Grace

Landslide Triggers

Several things can cause landslides, but the main ingredients are water, shaky ground, and changes to the land.

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Landslide Impacts
Patariki Grace Patariki Grace

Landslide Impacts

Landslides are common and can happen anywhere in the world.  It’s estimated that 400,000 landslides…

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Landslides in Aotearoa
Patariki Grace Patariki Grace

Landslides in Aotearoa

Landslides are a natural process that remove material from hills, mountains and coastlines.

Read More
Living with Landslides
Patariki Grace Patariki Grace

Living with Landslides

Landslides are a big problem in Aotearoa. 

  • Landslides have killed more people than all other natural hazards combined.

  • Landslides cost this country, on average, $250 to 300 million dollars a year.

Read More
Preparing for Landslides
Patariki Grace Patariki Grace

Preparing for Landslides

We can’t predict when natural disasters will occur, but we can prepare for them. One of the best places to start is with your home.

Read More

Connect with field trip experts

Insights into people and their careers.

Meet Beth

Beth is an Engineering Geologist who works for WSP, an engineering and professional services consulting firm.

Meet Blake

Blake is an Engineering Geologist who works for ENGEO – a firm of geotechnical engineers, geologists, environmental scientists and hydrologists.

Meet Courtenay

Courtenay is the Emergency Management team leader in Central Otago.

Explore the field trip videos

Join our field trip experts as we visit new places and learn new things.

Landslide Causes and Effects

Venture up Coronet Peak and stand upon an ancient landslide with Blake, an Engineering Geologist. Discover why Aotearoa has so many landslides and the impacts different landslide types have here in Central Otago.

Check your understanding

  1. What is a landslide and how are landslides triggered?

  2. Why are landslides so common in Aotearoa New Zealand?

  3. What types of landslides are common in Central Otago?

Hazard Mapping

Look at a new urban development in Tāhuna Queenstown to see how natural hazards are identified and mapped before deciding on the best way to manage future impacts.

Check your understanding

  1. What is the main hazard in this area and how was it identified?

  2. Where can you find information about hazards in your local area?

  3. How does the rockfall fence work?

Anchor Systems

See how Beth, an Engineering Geologist works safely on the cliff face at Nevis Bluff and what work she does on site.

Check your understanding

  1. What is a via ferrata?

  2. What work does Beth complete while using the via ferrata?

  3. What work does the ‘Abseil Management Team’ do?

Getting Cut Off

Landslides can damage roads and cut off communities. Visit Nevis Bluff, east of Tāhuna Queenstown, to see how the risk of rockfall is managed above a busy highway.

Check your understanding

  1. How big is the Nevis Bluff rockfall hazard?

  2. How many rockfall hazard features are managed across the Nevis Bluff?

  3. Why is Nevis Bluff geologically unstable?

Protecting Infrastructure

Discover how a team of people work to keep Nevis Bluff safe for people travelling on State Highway 6 between Tīrau Cromwell and Tāhuna Queenstown.

Check your understanding

  1. Why is blasting not used very often to remove rock from Nevis Bluff?

  2. What is rock scaling and how is it done at Nevis Bluff?

  3. How deep into the rock do the rock bolts go at the ‘mid-stream columns on Nevis Bluff?

Managing and Mitigation

Travel down the gorge to discover how a major piece of infrastructure is protected from multiple landslide risks.

Check your understanding

  1. What is the important piece of infrastructure that needs protecting from landslides in Tīrau Cromwell Gorge?

  2. Why are landslides a risk in this area?

  3. What has been done to reduce movement on landslides within the gorge?

Inside a Landslide

Venture inside a landslide through a tunnel above the Clyde Dam. See how landslides can be monitored and take a closer look at some rock layers within the landslide.

Check your understanding

  1. What do you think is monitored from this tunnel?

Managing Drainage and Slopes

Walk up on to the Frankton landslide in Tāhuna Queenstown to kōrero with Beth, an Engineering Geologist and Courtney, the team leader of Emergency Management Otago. Find out how this landslide is managed and what we should do to prepare for future landslide events.

Check your understanding

  1. How is the Frankton landslide managed?

  2. What should you do if you notice a landslide or signs of land movement?

  3. How can you prepare for natural hazards such as landslides?

Take the Google Earth tour

Take the Google Earth for Web Tour
A virtual tour of the field trip with GIS mapping, 3D locations, 360° panoramic images, videos, and further information.

Web conference

Replay the field trip web conference

Resources

Useful links

NHC Toka Tū Ake | Museum and schools programme
Part of the Natural Hazards Commission’s outreach work is to help raise hazard-aware Kiwis and support the understanding of natural forces that have shaped the land.

NHC | Natural hazards portal
Find out about landslide and natural hazard risk in Aotearoa New Zealand, and see how previous events have impacted a property by looking at past Natural Hazards Commission claims.

GNS Science Te Pū Ao | Natural hazards and risks | Ngā Matepā me ngā Tūraru ā Taiao
Earth Sciences NZ has a national leadership role in monitoring and researching the causes, risks and consequences of geological hazards in Aotearoa New Zealand, including landslides.

GeoNet
Check recent earthquakes, landslides and volcano alert levels.

Get Ready
Learn more about natural hazards in Aotearoa and how to prepare.

What's the Plan Stan?
A free resource to support schools, teachers and students to develop the knowledge and skills to prepare for emergency events.

Te Ara The Encyclopedia of New Zealand
A story on landslides including causes, types, examples and living with landslides.

New Zealand disasters With thanks to Christchurch City Libraries:

Landslides book
Download this book for tamariki from Hono the Māori Emergency Management Network and Te Tira Whakamātaki.

The Big Dig
Read this journal article on clearing the Manawatū Gorge Slip and download the literacy resource from Tāhurangi.

Glossary

Active fault
A fault that is likely to have another earthquake sometime in the future. Faults are commonly considered to be active if they have moved in the last 10,000 years.

Alpine Fault
Major fault line running through the South Island where the Indo-Australian and Pacific Plates collide.

Ash
Volcanic ash consists of rock, mineral, and volcanic glass fragments, which are slightly larger than the size of a pinhead. Volcanic ash is like finely crushed window glass and is not soft like ash from wood and paper. It is made of rocks that shattered into tiny pieces during an eruption.

Avalanche
A mass of snow, ice, and rocks falling rapidly down a slope.

Bedrock
The solid rock that lies under weathered rock and loose surface deposits such as soil.

Basalt
Basalt is a hard, fine-grained black volcanic rock. It has low viscosity, which means it flows easily. The main minerals in basalt include olivine, pyroxene, and plagioclase. Basalt erupts at temperatures between 1100°C and 1250°C. Basalt is the most common rock type in the Earth's crust.

Continent
An enormous, unbroken area of land. Earth's surface is divided into Africa, Antarctica, Asia, Australia, Europe, North America and South America. 

Continental drift
The movement of the Earth's crust (plates).

Crater
A large bowl-shaped cavity caused by an explosion or an impact. In reference to volcanoes, it forms after a volcanic eruption.

Crust
The outermost layer of the Earth, ranging from 10 to 65km in thickness worldwide. The uppermost 15-3 km of crust is brittle enough to produce earthquakes.

Debris
Broken and detached fragments, usually detached from a rock or mountain, and often piled up at the base.

Density
The weight of a known volume of material.

Earthquake
A sudden movement of the Earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity.

Epicentre
The point on the Earth's surface vertically above the hypocentre.

Erosion
Process of wearing away and transporting of rocks by wind, rain or ice.

Fault
A break in rock across which there is observable movement.

Fault trace
A visible break in the surface of the land caused by movement along a fault.

Fissure
A long narrow crack in the ground caused by earthquakes.

Fold
A rock layer that has been bent by pressure.

Geologist
A scientist trained in the study of the Earth.

Geology
The science of the make-up, shape and history of the Earth.

Geosyncline 
Massive trough (depression) in the Earth's crust which fills with sediments.

Gondwana
When the ancient Pangaea split into two continents, Gondwana was the southern landmass. It included most of Africa, Madagascar, India, Australia, Antarctica and parts of South America.

Horo whenua 
The Māori word for landslide 

Hydrothermal activity
Hot springs, geysers and warm ground created by heat from nearby volcanic activity.

Intensity
A measure of how strongly an earthquake manifests at the surface, based on its observable effects on people, buildings and the environment. Intensity is usually ranked using the 12-point Modified Mercalli Intensity (MMI) scale.

Landslide
The movement of a mass of rock, debris, or earth down a slope.

Landslide dam
When landslide debris blocks a stream or river, there are two parts to a landslide that dams a river: the landslide itself and the lake or pond that forms because of the landslide blocking the watercourse.

Landslide runout
The covering of an area by rock, debris, soil, and other material that is travelling downslope from the area in which the landslide starts. 

Magnitude
A measure of the energy released by an earthquake at its source. Magnitude is commonly determined from the shaking recorded on a seismograph. Each unit of magnitude on the scale represents a substantial increase in energy; for example, magnitude 6 releases 30 times as much energy as magnitude 5.

Plate boundaries
The edges of the plates that make up the crust of the Earth. 

Plates
Blocks of the Earth's continental and oceanic crust.

Regolith
Loose unconsolidated rock and dust or soil that sits atop a layer of bedrock.

Retaining wall
A structure designed to hold back soil, often constructed from materials such as rock, concrete, and masonry. Retaining walls are built to keep the land behind them from sliding away.

Rocks
Rocks are the hard mineral material of the Earth's crust. They can be either on the surface or underground. They are a mixture of minerals, mineral matter, or organic materials. Sedimentary rocks are formed by weathering and mechanical sorting on the Earth's surface. They include sandstone, limestone and shale. Metamorphic rocks are rocks that have been transformed by the effects of high temperature and pressure. They include schist, marble, and gneiss. Igneous, or volcanic, rocks form from magma. They include basalt, andesite, and rhyolite.

Rūaumoko (or Rūamoko)
In Māori tradition, earthquakes are caused by Rūaumoko - the god of earthquakes and volcanoes.


The Māori word for earthquake or to shake

Scarp
A steep slope, especially one formed by erosion or faulting.

Sediment
Small particles of rock carried by water, air or ice.

Sedimentary rock
Formed from particles of pre-existing rock, which are carried and deposited by water, wind or ice.

Seismic waves
The waves of energy released by an earthquake.

Slippage
The movement or loss of land from a slope when a landslide occurs beneath it.

Slumping
When loosely consolidated materials or rock layers move a short distance downslope.

Strata
A particular layer of a rock.  

Subduction zone 
The area or zone where two tectonic plates come together, one riding over the other.

Tectonic
The idea that the Earth's surface is a series of moving plates.

Tsunami
A series of powerful ocean surges caused by a large volume of the ocean floor being displaced – often by an undersea earthquake or landslide.

Tectonic uplift
Elevation of the ground caused by plate movement. 

Toe
The lower, usually curved end of a landslide; it is the most distant from the main scarp.

Viscosity
The more viscous a material is, the less likely it is to flow easily. The greater a material's viscosity, the greater its resistance to flow. Basalt lava has a low viscosity, so it flows more easily and farther than other lavas.

Viscous
If something is viscous, it has a thick, sticky consistency between solid and liquid. It does not flow easily.

Volcano
A volcano is a vent at the Earth's surface through which magma and volcanic gases erupt. It is also the cone built by effusive and phreatic eruptions.