Coastal Sea Level Rise Risk Assessor
For any coastal council or government, anywhere
Count what sits in the path of rising seas, put a defensible first number on the damage, and see who carries it. Four planning horizons, five scenarios, and a readiness rating, from figures your GIS team already holds.
Your area and scenario
The 1-in-100-year storm tide, including wave setup if your studies report it. Use the same high tide reference as your elevation bands.
All rateable properties, not only the low-lying ones.
What sits in each elevation band
Count assets by ground level above your present-day high tide reference (highest astronomical tide or your local equivalent). A GIS overlay of your elevation model on the cadastre and asset register gives you these numbers.
| Asset | 0.0 to 0.5 m | 0.5 to 1.0 m | 1.0 to 1.5 m | 1.5 to 2.0 m | 2.0 to 3.0 m |
|---|---|---|---|---|---|
Residential properties properties | |||||
Commercial and industrial properties properties | |||||
Roads km | |||||
Critical facilities facilities |
Values and financial settings
The defaults are placeholders. Replace them with local replacement costs in your currency.
Building and contents replacement value per property
Building, stock and fit-out replacement value per property
Reconstruction cost per kilometre
Treatment plants, pump stations, substations, hospitals, emergency services
Many standard property policies exclude actions of the sea, so the default is zero. Check the policies that apply in your market.
Used for the present value of storm damage to 2100.
Adaptation readiness
Rate each statement for your organisation as it stands today.
Coastal inundation and erosion are mapped for multiple sea level rise scenarios using high-resolution elevation data such as LiDAR.
Exposed properties and council assets are held in a register linked to the cadastre and the asset management system.
An adopted coastal adaptation plan sets pathways, trigger points and responsibilities for each exposed locality.
Land-use planning and development controls apply an adopted sea level rise benchmark to new development.
Adaptation works are costed and sit in the long-term financial plan, with a funding strategy beyond grants.
Physical climate risk is quantified in financial reporting, and the council's legal position on hazard notification is settled.
Exposed owners and residents have been told about their exposure, including the limits of standard insurance cover.
Storm tide warning, evacuation planning and monitoring of adaptation trigger points are in place and exercised.
Enter at least one exposure count and rate all eight readiness statements.
How the assessment works
Count by elevation
Enter properties, roads and critical facilities in five elevation bands above your high tide reference. An overlay of your elevation model on the cadastre gives you the counts.
Pick a scenario
Choose an IPCC AR6 pathway, the high-end case, or the benchmark your jurisdiction has adopted. Add your 1-in-100-year storm tide level.
Read the risk profile
See exposure at 2030, 2050, 2070 and 2100, average annual damage, how often today's extreme event returns, the uninsured share, and where to start.
The bill is landing on local government
Coastal damage estimates now run to hundreds of billions this century in a single country, and many standard insurance policies exclude actions of the sea. That leaves the cost with owners and with the councils that serve them.
Climate-related financial disclosure now asks for physical risk in numbers. A screening estimate is where that starts: enough to size the problem, rank localities and make the case for detailed modelling where it matters.
Need it at property level, on your own data?
The same model can run on your elevation, cadastre and asset data as a shared platform, so neighbouring councils do not each pay for their own build.
Talk to us →