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

 

Study of tsunami threat to Bay of Plenty

9 February 2005

Study of tsunami threat to Bay of Plenty For immediate release: Wednesday 9 February 2005

Tsunamis pose more of a threat to the Bay of Plenty than previously thought.

A geological study of the region’s coastline has found traces of six major tsunami events over the past 4000 years, each five metres in height or more. Another 11 smaller tsunami have been officially recorded since 1840 alone.

Environment Bay of Plenty, in partnership with Environment Waikato, initiated research into the tsunami hazard just over two years ago. The councils wanted to understand more about the potential threat of tsunamis to help them with civil defence planning.

The first stage of the project, which involved studying sediment cores for signs of early tsunami activity, was made public last year. Environment Bay of Plenty senior resource planner, Stephen Lamb, presented the results of the project’s second stage to the strategic policy committee today (Tuesday 8 February).

Mr Lamb told the committee the second stage analysed the general nature of the threat to the Bay of Plenty and Coromandel. It linked the findings of geological work with more recent historical records. It also studied the origins of local tsunamis, their causes, and the types likely to have the most impact. The final stage, to be commissioned soon, will define the areas of the coastline most at risk and consider options for managing that risk.

Mr Lamb said the geophysical survey had found traces of four localised tsunami events and two others that had a wider than regional impact over the past 4000 years. The survey could only pick up tsunamis greater than five metres, “so these were obviously quite significant events”. Another 11, smaller tsunamis (less than three metres) are recorded in New Zealand’s official historical records, started in 1840.


“The results show we have no automatic exemption from the impact of tsunamis. They have occurred in the past and are likely to occur again,” Mr Lamb said. A review currently being carried out of tsunami return periods will help assess the level of future risk.

The report suggests the greatest risk to the Bay of Plenty is from tsunamis originating close to shore, such as from an eruption of Mayor Island or a fault movement in the offshore Taupo Volcanic Zone.

A tsunami of this type could reach the coast in 30 to 60 minutes. “It seems that local or near-shore events are the likely cause of the significant events found by the geological research. They are likely to be more destructive than those generated at a distance.”

Tsunamis originating from further afield for example, from a landslide in the underwater Hikurangi Trough 250 to 300 kilometres away, would take two to three hours to reach the coast. Events of distant origin, say from a South American earthquake, could take 12 hours.

Strategic policy chairman Bryan Riesterer said tsunamis were “at the forefront of people’s minds” because of the devastating Boxing Day event. The regional council was already working to address the issue through this project, he added. The final stage will give constructive data on how to mitigate such threats.

ENDS

© Scoop Media

 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Scoop 3.0: How You Can Help Scoop’s Evolution

Entering into its third decade of operation, the Scoop news ecosystem is set to undergo another phase of transformation and evolution.

We have big plans for 2018 as we look to expand our public interest journalism coverage, upgrade our publishing infrastructure and offer even more valuable business tools to commercial users of Scoop. More>>

 
 

Speaking Of Transport: Public Engagement On Wellington Scenarios

“Our work on possible solutions for Wellington’s transport future is ongoing, but has progressed to the stage where we’re ready to share our ideas with the public and seek their feedback to help guide our next steps...” More>>

ALSO:

Parental Leave: National's Time-Sharing Change Fails

National has proposed a change to the Parental Leave and Employment Protection Amendment Bill that would allow both parents to take paid parental leave at the same time, if that is what suits them best. More>>

ALSO:

Train Free Thursday: Workers Strike To Defend Terms Of Employment

"They signed up to these conditions a year ago when they got the contract for Wellington's rail services. Now they're trying to increase profits by squeezing frontline workers." More>>

ALSO:

Seclusion: Ombudsman Emphasises Importance Of Monitoring

Disability Rights Commissioner Paula Tesoriero says that while there have been changes to the Education (Update) Amendment Act 2017 to prohibit the use of seclusion, the report is an important reminder of the importance of regular monitoring of schools. More>>

ALSO:

United Future History: "All Good Things Must End"

'We’re extremely proud of what we’ve achieved over the past 15 years, working alongside the government of the day, both National and Labour.' Mr Light told members on Monday. More>>

Gordon Campbell: On The TPP Outcome, And The Hobbit Law

Somehow the Trans Pacific Partnership trade deal has come lurching back from the dead – and as predicted in this column last week, the member countries gathered in Vietnam have announced a deal in broad principle, shunted aside until a later date the stuff on which they don’t agree, and declared victory. More>>

Agreeing To Differ: Greens Maintain Opposition To TPPA
“The Green Party has long opposed the TPPA. The new proposed deal, which came out of the weekend’s talks, still contains key ISDS concessions to corporations that put our democracy at risk, so our position remains the same,” said Green Party trade spokesperson Golriz Ghahraman. More>>

ALSO:

Monitoring Report: A New Chapter For Children’s Rights In New Zealand?

The Children’s Commissioner is calling on the country to embrace children’s rights to ensure their overall well-being. More>>

ALSO:

 
 
 
 
 

LATEST HEADLINES

  • PARLIAMENT
  • POLITICS
  • REGIONAL
 
 

Featured InfoPages

Opening the Election