Passive Rockfall Protection Structures In NZ Christchurch and Kaikoura

An overview of the types of structures used for rockfall protection constructed away from source. These includes ETAG27 certified dynamic fences, hybrid or attenuator fences and GTM reinforced soil bund.

Case studies in Christhchurch and Kaikoura. This talk will take you through an overview of rockfall protection problems and the general considerations when it comes to available solutions and approaches. Passive protection structures are very cost effective and technically feasible solutions especially when the problems are large scale and complex morphology in nature. The three main types of passive protection structures recommended in the NZ MBIE published guide. Project case studies in NZ especially around Christchurch and Kaikoura will also be showcased.

NZGS Dunedin Presentation and Social Event

Presented by James Molloy

James Molloy will give a brief Presentation on some of his more interesting work in the Otago area.


Following on from James Molloy’s Presentation, as we were all looking forward to our colleagues from around the country coming to visit in mid-October that has been interrupted by Covid-19,   it seems an opportune time for the local geotechnical community (and any other interested parties) to get together for a couple drinks, some networking and a catch up.


Please join us at Terra MDC’s office at 82 Bond Street on the evening of Thursday 15th October. We look forward to seeing you all there.


*A selection of alcoholic and non-alcoholic beverages, along with nibbles will be provided


Kindly sponsored by

Terra MDC

Building Compliance Technical Forum

Presented by Christchurch City Council, Engineering Services Team, Consenting and Compliance Unit

Geotechnical engineers, structural engineers and their associates are invited to a technical forum on regulatory compliance with clause B1 of the New Zealand Building Code. Speakers from the Christchurch City Council’s regulatory unit will present on updates to geotechnical guidance, structural materials, quality assurance, acceptance of producer statements/peer reviews and changes to building work exempt from building consent.

A question and answer session will be held after the presentation. Please submit questions via this google sheet on or before Monday 19th October.   HERE

To help us in planning for this event, please register to attend using the following link: HERE


Redi-Rock Retaining Systems

Presented by David  Hepburn

Business Development Manager


This is an introduction to Redi-Rock retaining systems which are now being supplied in NZ for land development and infrastructure applications.  David Hepburn of Duracrete Products will provide an introduction to the suite of design resources and free software analysis for geotech engineers. Some case studies of local and recent projects in NZ will be featured. The challenges of the applications and the variety of solutions for them will be highlighted. Feedback from clients, contractors and geotech engineers who have used it will shared.

Double Presentation: An earthquake-induced landslide forecasting tool, and its application in Hawke’s Bay & GNS Science Urban Geological Mapping Project – Napier-Hastings

An earthquake-induced landslide forecasting tool, and its application in Hawke’s Bay

(Chris Massey)

GNS Science has developed an earthquake-induced landslide (EIL) forecasting tool, initially using the 2016 Kaikoura Earthquake landslide dataset, but subsequently working in other EIL datasets (e.g. 1929 Murchison and 1968 Inangahua). The tool has been applied in Hawke’s Bay to understand the local rockfall hazard to tsunami evacuation paths on Bluff Hill, and where the regional landslide hazards are so this can be assessed against existing and planned asset development. The talk will cover off the development of the tool, its application in Hawke’s Bay, and its current limitations.


GNS Science Urban Geological Mapping Project – Napier-Hastings

(Julie Lee)


An updated geological map has been completed for the Napier-Hastings urban areas and a geomorphological map and subsurface 3D model will soon be released as part of a nationwide project that is mapping urban areas in New Zealand. 3D software and LiDAR data has enabled us to improve differentiation of Holocene units that form the Heretaunga Plains.  This presentation will describe these products and the results.


HBRC Council Chambers

Back Entry, Vautier Street

Refreshments 5.30pm

Presentations 6.00pm

*Doors will be locked at 6pm for security and entry is not possible after this time.



The Southern Alps of New Zealand: An Integrated Picture of an Evolving Plate Boundary

Presented by Phaedra Upton, Senior Scientist, Geodynamics Team Leader, GNS Science

The Southern Alps of New Zealand – An integrated picture of an evolving plate boundary

The central South Island has long been a favourite site to study and model oblique continental collision, because the orogen is young, narrow, and a single structure, the Alpine Fault, takes up >70% of relative plate motion. The orogen is highly asymmetric and varies along strike as the nature of the two colliding plates change along the boundary. I will explore the 3D structure and kinematics of the orogen, and discuss how regional deep-seated tectonic processes of mountain building are geodynamically interconnected with climate, landscape, and near-surface geological processes that create local fluid flow, effective stress, and temperature anomalies.