CANTERBURY EARTHQUAKE - NZ Chapter Breakfast Forum Citycare and AECOM
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CANTERBURY EARTHQUAKE
NZ Chapter Breakfast Forum
Citycare and AECOM
4.35am, Saturday 4 September 2010
Between 4 September and 21 February, the
region has experienced 5207 aftershocks.
Source: www.christchurchquakemap.co.nz
The 7.1 magnitude earthquake was felt
throughout the entire Canterbury region. It
was centered 40km west of the CBD at a
depth of 10km
12.51pm, Tuesday 22 February 2011
Between 22 February and 2 March, the
region has experienced 360 aftershocks.
Source: www.christchurchquakemap.co.nz
The 6.3 magnitude earthquake was far
more devastating because of its
proximity. It was centred 10km east of
CBD at a depth of 5km.
Comparison of Ground Accelerations
Size Of The Earthquake Events PEOPLE September - 2 major injuries and raft of minor injuries February – 180 deaths (estimated), multiple serious injuries and countless minor injuries SILT September - 20,000 tonnes of sand/silt removed from city streets and sections February - 370,000 (estimated) tonnes will be removed from city streets and properties WATER September - 60% of streets lost water and by Monday (3 days) 180 streets (out of a total of 3484 urban streets) were still suffering water loss after the initial earthquake (95% restored) February - Only 20% of the city had water immediately following the earthquake. As at 3 March (10 days) 75% of households have had their water reconnected. (20 March, 27 days 99% restored)
Response to Roading Closed bridges and roads Large amount of silt clearance Stormwater management Major repairs to make roads safe and trafficable Co-ordination of silt clean up from private properties (Student Army and ‘Farmy Army’ teams) RAMM (Roading Assessment and Maintenance Management) database
Source: www.stuff.co.nz
www.photoblog.msnbc.com
Below: February impact Above: September impact
ChCh Wastewater Treatment Plant Oxidation Ponds
Application of Learnings –
Division Of City Into Areas
To better manage the demand and workflow, the city was split into ten ‘areas’.Application of Learnings –
Use of RAMMApplication of Learnings
Temporary Services Water Supply Water tankers Temporary water pipelines Chlorination Sewer Bypass pumping Pumping into rivers Sewage tanks Pumping out manholes Portable toilets
Issues Faced During Both Events Trying to obtain a detailed picture of the extent of the damage 24 hour response and management structure (sustained for three weeks) Volume of RFS’ received Immediate weather risk following the earthquake (wind/rain) Potential for public health risk (compromised water and wastewater network) Adequate welfare for staff (such as food) Continual aftershocks causing further damage Shortage of material supply in Christchurch Specialist plant from around the country
What Was Different in February
From A Company Point of View?
There were multiple fatalities
Staff / family separation
Impact on staff and their families, e.g. school closures, homes, partner’s work
Greater magnitude of damage in February earthquake than September
earthquake
Expectations on City Care were high in February due to levels of service from
September earthquake
City Care National office located within cordon – no access possible
Access within and around city was more difficult
Knowledge from early on that the response and recovery phases in the
February earthquake were/are going to be considerably longer in duration.
From this it was determined that staff welfare and sensible rostering of work
was going to be criticalIssues Faced During Both Events Dealing with the large number of offers of assistance from other organisations and members of the public Maintaining health and safety standards Understanding when a fix wasn’t working - where permanent fixtures were not holding, temporary fixes were quite often the only course of action – determining this and moving forward was critical Difficulty in travelling around the city due to building and road damage, and road closures. Damage or lack of access to/back up for traffic control systems Overload of and damage to cellular network Co-ordination with other contractors who were working in the same area (e.g. telecommunication suppliers, power suppliers)
Learnings for Contractors Although the cell network remained active – it is important not to rely on the cell network – backups such as RT are critical Have welfare systems in place (communications, catering, rostering and support) Reporting of information, and ensuring that client and contractor are using the same information/data Better access to information and sharing of this information Ability to provide accurate information of what is happening Reward of efforts to staff Back up operation facilities Staff welfare Staff involvement in the emergency works (response phase) Strategy – thinking about the future Contingency plan for fuel supplies
Learnings for Clients Clear communication lines between contractor, Emergency Operations Centre and client More resources than normal will be required, including: • specialist subcontractors • material supplies • communications (backup) equipment A maintenance contractor will be required for response work, therefore involve them at the highest possible level of the response planning phase Have contingency plans in place for extended outages, including how you are going to provide services and how you are going to rebuild Trained staff on front-line call centres, meaning: • less investigation required by contractor • better details gained from caller • greater ability to sort RFS’ • more focus going on urgent work Accurate classification of RFS’ and priority levels so major issues are dealt with promptly and allowing for RFS’ into logical work categories Relationships arranged with key specialist subcontractors
Interdependency of Systems
Communications
Fuel for collection vehicles
Transport Fuel
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Deliveries
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Hygiene
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Power for refrigeration,
Fuel for vehicles & generators
Fast Moving cleaning, lighting and
sales Power for switches
Consumer Power Telecoms
Goods nic
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Habitable workplace
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Withdrawals
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SCADA &
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Banking Water
Water
SCADA & communications
Communications & EFTPOS
Fuel for vehicles & generatorsYou can also read
