Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 

Seismic survey to map Lake Wanaka lake bed

A recent review of active faults in the Queenstown Lakes and Central Otago districts by GNS Science, commissioned by the Otago Regional Council (ORC), identified a likely active fault under Wanaka, which may be part of the North West Cardrona Fault.

This fault was previously thought to have run northeast from the Cardrona Valley, through Albert Town to Hawea. GNS scientists now propose that the fault runs northwest past the foot of Mt Alpha, beneath part of Wanaka township, and out under the lake.

ORC Natural Hazards Analyst Ben Mackey said further work was needed to substantiate the findings and understand any implications for Wanaka.

“Since receiving the GNS report, the ORC has commissioned NIWA to carry out a geophysical survey of sediments beneath Lake Wanaka. This work will look for evidence that the fault continues out into Roys Bay,” he said.

NIWA will be using advanced multibeam echo sonar equipment to map the lake, a process where systems emit sound waves in a fan shape beneath the boat's hull, gaining information from the returning soundwaves.

“The survey is taking place over two days beginning 2 December on Lake Wanaka, where they will focus their efforts from Roys Bay to Beacon Point,” Dr Mackey said.

The goal of the survey is to improve ORC’s understanding of the active faults in the area and narrow down what hazard they may pose for Wanaka and the surrounding area.

NIWA has carried out this type of work in the past, at both Lake Tekapo and Lake Wakatipu. They will use the same procedures applied on Lake Tekapo, where evidence of past landslides and an active fault was investigated on the lake.

NIWA Marine Geologist Dr Joshu Mountjoy said, “The lake sediments record past natural hazards, and in Lake Wanaka we are searching for disruption of sediment layers caused by surface or near-surface rupture of faults during earthquakes.

“In Wanaka we are looking for the lakeward continuation of a newly-mapped fault and we are hopeful that we will get a much better picture of what is happening.”

To read the full “Active Faults – Central Otago and Queenstown Lakes” report, visit https://www.orc.govt.nz/otagofaultsreport [PDF].

For more on how to prepare for an emergency, visit the Emergency Management Otago website www.otagocdem.govt.nz and for help making an emergency plan visit www.happens.nz.


© Scoop Media

 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell : On Dealing With Impeccable, Impeachable Lies

By now, the end game the Republican Senate majority has in mind in their setting of the rules for the impeachment trial of Donald J. Trump is pretty clear to everyone: first deny the Democrats the ability to call witnesses and offer evidence, and then derisively dismiss the charges for lack of evidence. For his part, does former security adviser John Bolton really, really want to testify against his former boss? If there was any competing faction within the Republican Party, there might be some point for Bolton in doing so – but there isn’t. More>>

Published on Werewolf

 
 

WINZ Quarterly Report: More People Getting Into Work

The December quarter benefit numbers released today show the Government’s plan to get people off the benefit and into work is starting to pay off,” Social Development Minister Carmel Sepuloni said. More>>

ALSO:

Changing lives: Boost In Whānau Ora Funding

Whānau throughout New Zealand are set to benefit from an extra three million dollars that will go directly to Whānau Ora Commissioning Agencies, the Minister for Whānau Ora Peeni Henare announced today. More>>

ALSO:


PGF Kaikōura $10.88M: Boost In Tourism & Business

The Provincial Growth Fund (PGF) is investing $10.88 million to boost business and tourism opportunities in Kaikōura, Parliamentary Undersecretary for Regional Economic Development, Fletcher Tabuteau announced today. More>>

ALSO:

Whitebaiting: Govt Plans To Protect Announced

With several native whitebait species in decline the Minister of Conservation Eugenie Sage has today released proposals to standardise and improve management of whitebait across New Zealand. More>>

ALSO:


Education: Resource For Schools On Climate Change

New resource for schools to increase awareness and understanding of climate change... More>>

ALSO:

In Effect April: New Regulations For Local Medicinal Cannabis

Minister of Health Dr David Clark says new regulations will allow local cultivation and manufacture of medicinal cannabis products that will potentially help ease the pain of thousands of people. More>>

ALSO:


Gordon Campbell: On What An Inquiry Might Look Like

Presumably, if there is to be a ministerial inquiry (at the very least) into the Whakaari/White Island disaster, it will need to be a joint ministerial inquiry. That’s because the relevant areas of responsibility seem to be so deeply interwoven... More>>

ALSO:


 
 
 
 
 

LATEST HEADLINES

  • PARLIAMENT
  • POLITICS
  • REGIONAL
 


 

InfoPages News Channels