34 Works

The 23rd January 2019 Cape Kidnappers coastal cliff collapse, Hawke's Bay, New Zealand

Saskia J. de Vilder, G. D. Dellow, Garth C. Archibald & Regine Morgenstern
An approximately 25,500 m³ debris avalanche occurred on the 23rd January 2019 from the coastal cliffs of Cape Kidnappers, Hawke’s Bay. The debris avalanche was observed by multiple bystanders, and seriously injured two tourists. The tourists were walking along the beach, which forms the public accessway to the Gannet Colony at Cape Kidnappers – a popular tourist attraction in the Hawke’s Bay. The cliff collapse occurred within a conglomerate unit located in the upper 50...

From rain through river catchment to aquifer: the flow of water through the Wairau hydrologic system

Uwe Morgenstern, P Davidson, Dougal B Townsend, Paul A White, Rob W van der Raaij, Mike K Stewart, Magali Moreau & Chris J Daughney
Groundwater is an important source of water for the Wairau Plain. Concerns about its sustainable yield and contamination from nutrients have prompted several hydrogeological studies over time to better understand the groundwater system. The main aim of this study is the review and consistent interpretation of age-tracer, isotope and chemistry data, collected between 1968 and 2019, to obtain the hydraulic parameters necessary to understand the declining water levels and spring flows and to assess the...

Interpretation of the 2017 groundwater age tracer and isotope results for the Christchurch aquifer system

Mike K. Stewart & Rob W. van der Raaij
This report interprets the results from groundwater age tracer and isotope measurements in the Christchurch aquifer system in 2017. The study included carbon-14, tritium and trace gases measured at GNS, stable isotopes (oxygen-18 and deuterium), and water chemistry measured at the same time (results given in Appendices 1 and 2). The interpreted mean ages and water sources are compared with results from measurements from each decade between 1976 and 2006 to see how the system...

Tsunami threat level database update

Aditya R. Gusman, Xiaoming Wang, William L. Power, Biljana Lukovic, Christof Mueller & David R. Burbidge
GNS Science had previously developed a tsunami scenario database with threat level maps for New Zealand from earthquake sources around the Pacific Ocean that can be used for tsunami early warning purposes. Here we describe the method and assumptions used to create an updated version of the database. One of the main improvements is that we have greatly increased the number of scenarios in the new database. Scenarios now exist down to lower magnitudes for...

Pre-historic ruptures on 2016 Kaikōura earthquake faults and implications for seismic hazard

Robert L. Langridge, Andy Nicol, David J A Barrell, P Almond, Kate J Clark & Mark W Stirling
The 14 November 2016 Mw 7.8 Kaikōura Earthquake was one of the largest and most complex on-land earthquakes ever observed globally and ruptured at least 14 faults with displacements of >1.5 m. The earthquake ruptured faults progressively from near the epicentre in the southwest on The Humps Fault in the North Canterbury (NCD) domain, northeast into the Marlborough Fault System (MFS) and on to Cape Campbell, including rupture of submarine faults and extensive uplift of...

Assessing the uncertainty of water quality and quantity predictions made using complex regional models: Ruamāhanga South case study

Brioch Hemmings, Matthew J. Knowling & Catherine R. Moore
The Smart models for Aquifer Management research programme aims to explore the utility and implications of using simple numerical models for decision support applications. This report details a case study example of the application of complex numerical groundwater model as a tool of assessing the effectiveness of land-use resource management scenarios. The case study focuses on the lower Ruamāhanga catchment, Greater Wellington, NZ (Ruamāhanga South). Scenarios relate to nitrate loading change related to distributed change...

Hei koha tū, hei kura huna a papa: a resource characterisation and ancestry of minerals for Ngāti Hako

Mark P. Simpson, P. Clarkin, Anthony B Christie & Diane Bradshaw
Mineral resources have long provided Māori with trading opportunities and growth through innovative developments with those from the Hauraki rohe used and traded by Ngāti Hako; the earliest inhabitants of Hauraki. Basalt from Tahanga was fashioned into adzes and obsidian from Tūhua (Mayor Island) was used as cutting tools; the latter traded throughout New Zealand. Other rocks and minerals from the Hauraki rohe have since become of economic significance (e.g. gold and silver) or are...

Kinematics of the New Zealand plate boundary: field report on GNSS surveys of the Taranaki Network in 2019 (TARA2019)

Rory J. A. Hart & Neville G. Palmer
Between March and June 2019, a combined team from GNS Science and Land Information New Zealand (LINZ) re-measured a network of 109 geodetic survey markers using Global Navigation Satellite System (GNSS) methods throughout the Taranaki and Manawatu regions of New Zealand for monitoring the regional deformation due to tectonic processes. Included in the survey were 13 sites located in the Te Urewera mountains and Raukumara Peninsula that were observed to complete the requirements for the...

Post-earthquake building functionality and habitability in New Zealand: Survey results

Finn R. Scheele, SR Uma, Tatiana Goded, Maureen A Coomer, Nick A. Horspool & Jose Moratalla
The habitability and functionality of buildings following earthquake events has a significant impact on the recovery process. Understanding the factors that influence levels of post-event habitability and functionality can assist in identifying areas for improvement in risk reduction and resilience and allows for improved modelling of social impacts. We developed an online survey to gather data from individuals that had experienced recent earthquake events in New Zealand. Broadly, questions were asked regarding the following categories:...

Integrated 3D petroleum generation, migration and charge modelling in the Kupe-Kapuni region, south-eastern Taranaki Basin

Karsten F Kroeger, Rob H Funnell, M Fohrmann & Matt G Hill
This report presents workflows and results of integrated petroleum systems modelling of the Kupe region in the south-eastern Taranaki Basin. A series of PetroMod™ 3D models have been built for numerical forward modelling of the complex tectonic and sedimentological evolution of the area. The models use a detailed structural and stratigraphic model based on high-resolution grids (100 x 100 m) developed from new reflection seismic data interpretation carried out as part of the GNS 4D...

Classification of New Zealand hydrogeological systems

Magali Moreau, Paul A. White, Frederika Mourot, Zara J. Rawlinson, Conny Tschritter, Stewart G. Cameron & Rogier S. Westerhoff
Digital datasets of New Zealand hydrogeological systems and their boundaries have been developed using a nationally-consistent and transparent methodology. Here, we define hydrogeological systems as geographical areas with broadly-consistent hydrogeological properties, and similar resource pressures and management issues. These systems are represented in two Geographical Information System (GIS) datasets at the 1:250,000 scale, i.e., hydrogeological system polygons and system boundary polylines. The hydrogeological system polygons (1896 in total) include attributes corresponding to mapping levels, i.e.:...

2019 thermal infrared survey of the Waiotapu Geothermal Field

Robert R. Reeves & Fiona Sanders
An aerial thermal infrared (TIR) survey of the Waiotapu Geothermal Field was undertaken on 13 April 2019. Approximately 2260 TIR images were processed and mosaicked to produce a single, 16-bit image with a ground pixel size of approximately 2 m x 2 m (Figure A.1). The purpose of this report is to summarise the method of data collection and present the final TIR image and accompanying brief interpretation. The TIR data is of good quality...

Residual gravity anomalies of the Taupō Volcanic Zone and adjacent region

Vaughan M Stagpoole, Craig A Miller, Thomas Brakenrig, Nick Macdonald & Fabio Caratori Tontini
The 2019 map of residual gravity anomalies of the Taupō Volcanic Zone and adjacent region is an update of the map of Stagpoole and Bibby (1999). An additional 1795 observations have been used in the 2019 compilation, bringing the total to 9189. All data used for the map have been uniformly processed and anomalies calculated using high resolution digital terrain models. The regional gravity field, used to separate the residual gravity anomalies from Bouguer anomalies,...

Hikurangi Ocean Bottom Investigation of Tremor and Slow Slip (HOBITTS IV)

Laura M. Wallace &
HOBITSS IV was a 12-day (24 June–5 July 2017) Wellington to Wellington R/V Tangaroa voyage (TAN1705). Objectives of TAN1705 were to (1) undertake seafloor geodetic instrument deployments, recoveries, and surveys offshore Gisborne and Mahia, and (2) acquire multicores along the Hikurangi margin and offshore the north-eastern South Island to evaluate the extent of turbidite deposition following the November 2016 Kaikōura earthquake. The seafloor geodetic aims involve using Bottom Pressure Recorders (BPRs) to determine the cm...

Geothermal gas emission and its impact on hauora and taiao at Whakarewarewa, the Living Village

Agnes Mazot, R. Huata, Diane Bradshaw, Perry K. Davy, B. Millar, J. Warbrick, J. Davis & Andreas Markwitz
This research explores the effect of Hydrogen Sulfide (H2S), a primary geothermal gas and in a certain extent Carbon Dioxide (CO2), has on humans when exposed to extreme environmental conditions. In this report we document and record the traditional histories/Mātauranga concerning the connection between H2S and the hauora (health) of people at the Whakarewarewa Village. An integrated database helped with the integration of technical, scientific and traditional Māori information, and the support of agile knowledge...

Gravity survey data

A catalogue of over 40,000 gravity survey observations in New Zealand, including free air, Bouguer and isostatic gravity anomalies has been assembled. These data have been assembled from survey measurements mostly made by Geophysics Division, Department of Scientific and Industrial Research, (now GNS Science) since the 1940s using a variety of meters. Some gravity data has been contributed by petroleum explorers and universities. In 2004 all data were uniformly reprocessed using GNS Science software and...

Better spatial characterisation of evapotranspiration and rainfall recharge estimates to groundwater using remote sensing multispectral techniques at lysimeter sites

Frederika Mourot, Rogier S. Westerhoff, Nick Macdonald & Stuart G. Cameron
Regional councils have the responsibility to set up allocation limits to protect and ensure the sustainable use of their freshwater resources. An important part of allocation limit setting consists in assessing the amount of recharge to groundwater. Improvement of recharge models and assessments of sustainable allocation limits will become more important in the context of climate change, where more variable rainfall inputs are expected in the future. This study, commissioned by Envirolink for Hawke’s Bay...

Auckland Volcanic Field eruption crisis management decision-making workshop

A. J. Wild, Jan M Lindsay, S. B. Costello, Natalia I. Deligne, A. Doherty, Graham S. Leonard, K. Maxwell, J. Rollin & Tom M. Wilson
Auckland is the largest city in New Zealand with 1.6 million residents. This major metropolitan region is situated upon the Auckland Volcanic Field (AVF), posing a considerable risk to the city’s population and essential services. On 17 December 2018, a workshop jointly run by DEVORA (Determining Volcanic Risk in Auckland) and Auckland Emergency Management (AEM) was held to discuss evacuation decision-support options in the event of a volcanic crisis in Auckland. The workshop brought together...

A 3D gas hydrate model of the southern Hikurangi Margin

Karsten F Kroeger, Gareth J Crutchley, Richard L Kellett & P Barnes
This dataset contains underlying data and results of 3D gas hydrate modelling at the southern Hikurangi Margin using PetroMod™ software and accompanies a manuscript published in the Geochemistry Geophysics Geosystems journal (DOI10.1029/2019GC008275). The model integrates thermal and microbial gas generation, migration and hydrate formation. Modelling these processes has improved the understanding of factors controlling hydrate distribution. Three spatial trends of concentrated hydrate occurrence are predicted. The first trend (I) is aligned with the principal deformation...

New Zealand ShakeOut 2018 Observation Evaluation Report: a summary of high-level findings

Emily Lambie, Julia S Becker & Maureen A Coomer
The New Zealand ShakeOut 2018, organised by the Ministry of Civil Defence and Emergency Management (MCDEM), was the latest national earthquake drill to be held in New Zealand. Over 870,000 participants registered to participate in the drill via the ShakeOut website. The drill was held on 18 October 2018 at 9:30 a.m., and participants were encouraged to practice ‘Drop, Cover and Hold’ in response to a potential earthquake. In addition to the drill, other activities...

Uppermost Teurian to lowermost Bortonian foraminiferal biostratigraphy of the Mead Stream section, Clarence River valley, Kaikoura district, New Zealand

C. Percy Strong
This report reviews and revises foraminiferal samples collected over some 3 decades from c. 245 m of the medial Amuri Limestone at Mead Stream, including all the Lower Marl and Upper Limestone, together with adjacent strata of the Lower Limestone and Upper Marl. These strata range from in age from Late Paleocene to Middle Eocene, however, most of the samples are Early Eocene in age. One-hundred and two samples were previously studied, 35 are new...

Obtaining water level data at Whakarewarewa Geothermal Valley using unmanned aerial vehicle photogrammetry

Nick Macdonald, Robert R. Reeves, Duncan J. Graham & Thomas Brakenrig
Unmanned aerial vehicles (UAVs) offer a novel means of studying dangerous and inaccessible areas. They have the advantage of having the ability to survey large study areas relatively quickly, while utilising a wide array of sensors. Monitoring the water level of geothermal pools is important for providing insight into how fluids may be flowing and interacting between geothermal surface features and shallow groundwater aquifers. Making manual measurements of water levels in geothermal areas can be...

Assessing the uncertainty of water quality and quantity predictions made using complex regional models: Ruamāhanga North Case Study

Brioch Hemmings, Matthew J Kowling & Catherine R Moore
The Smart models for Aquifer Management research programme aims to explore the utility and implications of using simple numerical models for decision support applications. This report details a case study example of the application of a complex numerical groundwater model as a tool of assessing the effectiveness of land- and water-use scenarios. The case study focuses on the upper Ruamāhanga catchment, Greater Wellington, NZ (Ruamāhanga North). The effect of land- and water-use scenarios are assessed...

Te Kura Whenua ki Pukearuhe wānanga completion report

Malcolm J. Arnot, Kyle J. Bland, Hannu C. Seebeck, Richard L. Kellett, Greg H. Browne, Tania Gerrard, Hemi Waitaiki-Curry & Tiaan Bonica-Kururangi
In March 2019, GNS Science and Ngāti Tama, in collaboration with Ngāti Mutunga, led a Te Kura Whenua wānanga at Pukearuhe Marae, Urenui, Taranaki. Te Kura Whenua is a community engagement initiative aimed at creating dialogue and sharing knowledge between scientists and Māori communities on geoscience-related topics, such as climate change, geological hazards and geological resources, and Māori perspectives on the whenua. The two-and-a-half day wānanga involved field-based and hands-on activity-based learning. This report outlines...

Registration Year

  • 2019
    34

Resource Types

  • Text
    32
  • Dataset
    2

Affiliations

  • GNS Science
    34
  • University of Canterbury
    2
  • Massey University
    2
  • //ror.org/03vaqfv64:GNS Science
    2
  • Victoria University of Wellington
    1
  • University of Otago
    1
  • University of Auckland
    1