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

 


Chch experiences more flooding because of the earthquakes

Christchurch experiences more flooding because of the earthquakes

March 5, 2014

Christchurch is now experiencing more frequent and severe flooding due to the impact of the earthquakes, University of Canterbury (UC) researchers said today.

It is more than three years since the first earthquake on 4 September 2010 and earthquake-induced ground deformations such as lateral spreading, liquefaction, subsidence and uplift are posing an enhanced flooding threat to Christchurch.

City residents’ concerns about frequent flooding of their houses and gardens have been a topical issue in recent years.

A UC geography masters student, Su Young Ko, says increased flooding is not just because of the extreme and prolonged rainfall but, is also due to various other natural environmental processes such as tides, background sea level rise and sea storms.

"One of the primary contributors to increased flooding hazards in Christchurch are the earthquakes which resulted in subsidence in some areas, narrowing of channels and uplifting of river beds," Su Young says.

Civil and natural resources engineer Dr Sonia Giovinazzi and geography researcher Dr Deirdre Hart have been investigating the city’s increased flooding hazard as a direct result of the earthquakes.

The cascading effects of the earthquake that led to changes in flooding hazard patterns across the city are being investigated as a key case study which involves Dr Christopher Gomez (Geography), Dr Tom Cochrane (Civil and Natural Resources Engineering) and Marion Gadsby (Environment Canterbury).

They are exploring flooding resulting from earthquake impacts on lifeline infrastructures, such as roads, waste, storm and drinking water, electricity and telecommunications systems, and the communities they support.

Their research is supported by the Natural Hazards Research Platform, Canterbury Civil Defence Emergency Management Group, Earthquake Commission, GNS Science, Christchurch City Council, Waimakariri District Council, Selwyn District Council, Environment Canterbury, Chorus, Orion, Contact Energy and the UC Quake Centre.

UC Geography Associate Professor and climatologist Peyman Zawar-Reza says the low pressure centre which parked itself just east of the South Island pumped substantial rain over the Canterbury region.

"Typically, cold fronts associated with low pressure centres propagate rather fast but this one is producing sustained rainfall over the region due to its slow progress.”

Dr Hart says this is the type of meteorological system that elevates sea levels locally at the same time as generating big waves off the eastern South Island.

"High wind speeds working on transferring their energy to the sea surface over several days makes for extreme coastal conditions. Where we had four metre wave heights a week ago, 12 metre high waves are now being recorded off Banks Peninsula.

"Compounding these effects, we are just coming out of a spring tide cycle where we experience our highest monthly tidal water levels," says Dr Hart, former chair of the New Zealand Coastal Society.

Dr Gomez says his research shows that unfortunately such events are a scary reality for numerous coastal cities around the globe, such as Tokyo in Japan, Jogjakarta in Indonesia, and even Wellington in New Zealand.

"We all have vivid memories of what has happened recently in the UK and we have to learn to better manage such events." Dr Gomez says.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

Gordon Campbell:
On Winston Peters’ Latest Bout Of Immigrant Bashing

So in the latest 3News-Reid Research poll, New Zealand First and the Conservatives have been the big winners. It is only one poll, but rather than cannibalising each other’s vote, Colin Craig and Winston Peters do seem to be managing to find the room to co-exist...

Poll fixation though, is a symptom of horse race journalism. To date, the focus has been on the poll numbers for New Zealand First – at 6.3% in this latest poll – and the power that this puts in Peters’ hands. Few are questioning how he’s got to this happy place, and what it says about the mood of the electorate. Yet as sure as night follows day, Winston Peters is once again peddling bile at the immigrants in our midst. More>>

 

Parliament Today:

Collins 'Misinterprets Media Reports': "Too Compromised To Remain Justice Minister"

Bizarre claims by Judith Collins this morning that she had been cleared of inappropriate behaviour by the Privacy Commissioner demonstrates she is too compromised to remain Justice Minister, Labour MP Grant Robertson says. More>>

ALSO:

Labour On Climate Change: Focus On The Now For The Future

A Labour Government will put in place a comprehensive climate change strategy focusing on both mitigation and adaptation, establish an independent Climate Commission and implement carbon budgeting, says Labour Climate Change spokesperson Moana Mackey. More>>

ALSO:

Gordon Campbell: On National’s Housing Assistance Plan

So, as many as 90,000 people could derive some benefit from National’s housing assistance plans for low and middle-income earners... Yet in reality, the benefits seem likely to be insignificant, and they will be skewed towards those at the top end of the income group that’s supposedly the target. More>>

ALSO:

Election Data Consortium: National’s Worst Case Scenario At Stage One?

A month out from the general election and ipredict traders are still forecasting National’s vote to slip below current polling levels and there is potential for it to fall further. More>>

ALSO:

From The Scoop Video Archive: PM Says SIS "Told Me" About OIA Release

In a press conference immediately following an controversial OIA release of notes on an SIS briefing to then Labour leader Phil Goff, Key said "at that point [Tucker] told me he'd release it ...". Since the release of Nicky Hager's 'Dirty Politics' Key has denied being personally informed and said references by officials to 'the PM' being told briefed referred to his office. He now says the same about his own statement. More>>

ALSO:

  • Scoop Video in the news - New questions over Key claims | NZ Herald News - Stuff.co.nz
  • Earlier - Felix Marwick: Laying out facts over SIS documents - Newstalk ZB
  • Labour - Director’s letter contradicts Key’s claims
  • ACT - The Letter - 26 days to go
  • TV3 Video - Housing issue nudges Dirty Politics aside - David Cunliffe: Key's SIS explanation 'defies belief' - SIS leak came from Key's Office - Goff - Key 'categorically denies' Slater OIA discussion - Video: Key faces more Dirty Politics questions

  • TVNZ - Winston Peters: ‘Dirty Politics' is a new low
  • The Nation - Debate Between Grant Robertson And Russel Norman
  • NZ First - “The Words Mean What I Say They Mean”
  • Schools, PPTA Sign Up: Primary Teachers And Principals Vote Down Govt Plan

    Teachers and principals have voted overwhelmingly against the Government’s controversial “Investing in Educational Success” policy, including proposed highly-paid principal and teacher roles. More>>

    ALSO:

    Gordon Campbell: On The Usual Round Of Mud Slinging And Name-Calling

    This week gave an interesting example of how hard it is to untangle the reality from the slanging matches. The issue that emerged early this week could hardly be more important. Does the government intend to cut spending in health, education and on the environment if re-elected, or not? More>>

    Earlier:

    Electionresults.co.nz: National and NZ First Rise in Roy Morgan Poll

    National has bounced back in the latest Roy Morgan Poll but the big winner has been New Zealand First who rise to their highest level of support since September 2013. More>>

    ALSO:

    Get More From Scoop

     

    LATEST HEADLINES

     
     
     
     
     
     
     
     
    Regional
    Search Scoop  
     
     
    Powered by Vodafone
    NZ independent news