Flood and coastal risk projects, schemes and strategies: climate change allowances

When and how risk management authorities should use climate change allowances for flood and coastal risk projects, schemes and strategies.

What climate change allowances are

Climate change allowances are predictions of the anticipated change for:

• peak river flow
• peak rainfall intensity
• sea level rise
• offshore wind speed and extreme wave height

They are based on UK climate change projections. There are different allowances for different epochs or periods of time over the coming century.

Contents

1. What climate change allowances are
2. Exceptions to using climate change allowances
3. Why you need to use climate change allowances
4. General approach to apply climate change allowances
5. Transition arrangements
6. Peak river flow allowances
7. Peak rainfall intensity allowances
8. Sea level allowances
9. Offshore wind speed and extreme wave height allowance
10. Storm surge
11. Wave period
12. Adaptive approach to managing flood and coastal erosion risk