EQC Increased Flooding
Vulnerability
• CAG overview
• 22 July 2014
Outline
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EQC land cover
IFV – what it is and what it isn’t
General IFV criteria
Flood modelling
Assessment process
Settlement process
Next steps
EQC Land Damage Cover
EQC land cover
• Land
– Under building
– 8m around building & structures
– main access within 60m of dwelling
• Bridges and culverts in the land above
• Retaining walls within 60m of building and
supporting the building or land as above
EQC land cover
Increased Flooding Vulnerability
IFV is
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a physical change to residential land, that is
a result of the earthquakes, which
adversely affects the uses and amenities of that land, by
increasing the vulnerability of that land to flooding
events.
Changes to the insured land that result in it
becoming more vulnerable to flooding as a direct
result of the earthquakes are covered by EQC.
Not IFV
– Flooding that occurred pre-earthquake sequence, or
– Increases in flooding due to changes to offsite
drainage due to earthquakes, or
– Increases in flooding due to changes in streams and
rivers offsite.
General IFV Criteria
• The flood depth has increased by 200mm or more as
a result of the Canterbury earthquake sequence, and
• The flood depth has increased by 100mm or more as
a result of a single earthquake event, and
• The land has suffered observed damage as a result of
the Canterbury earthquake sequence, and
• The change in flooding vulnerability has caused the
value of the property to decrease.
Changes in ground levels
LiDAR surveys
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5 different sets
Earthquake Events
Pre-September 2010
4 September 2010:
7.1M
22 February 2011:
6.3M
13 June 2011:
6.4M
23 December 2011:
6.2M
Post-September 2010
Post-February 2011
Post June 2011
Post-December 2011
2Mile Creek Detailed Design
Plan: Plan 06
11/11/2013
RS = 799.67
Cross Section Surveys
.059
.035
.059
.1
3.5
Legend
WS PF 6
3.0
Ground
Bank Sta
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For priority waterways
Elevation (m)
2.5
2.0
1.5
1.0
0.5
0
5
10
15
Station (m)
20
25
30
IFV Assessment
Process
Next steps
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Ground truthing
Valuation
Declaratory Judgement
Possible settlement approaches
– Diminution of value
– Contributing to CCC offsite flood mitigation works.