Summary of existing European guidelines on climate change adjustment factors on design floods and design rainfall (COST, 2013).
| Country . | Region . | Variable . | Guideline . | Reference . |
|---|---|---|---|---|
| Belgium | Flanders | Design floods | 30% increase | Boukhris & Willems (2008) |
| Belgium | National | Design rainfall | 30% increase | Willems (2011) |
| Denmark | National | Design rainfall | 20, 30 and 40% increase for return periods 2, 10 and 100 years | Arnbjerg-Nielsen (2008) |
| Germany | Bavaria | Design flood with 100-year return period | 15% increase | Hennegriff et al. (2006) |
| Germany | Baden-Würrtemberg | Design floods | Increase between 0 and 75% depending on location and return period | Hennegriff et al. (2006) |
| Norway | National | Design floods | 0, 20 and 40% increase based on region, prevailing flood season and catchment size | Lawrence & Hisdal (2011) |
| Sweden | National | Design rainfall | Increase between 5 and 30% depending on location | SWWA (2011) |
| United Kingdom | National | Design floods | 20% increase for 2085 | DEFRA (2006) |
| United Kingdom | National | Design rainfall | 10, 20 and 30% increase for 2055, 2085 and 2115 | DEFRA (2006) |
| Country . | Region . | Variable . | Guideline . | Reference . |
|---|---|---|---|---|
| Belgium | Flanders | Design floods | 30% increase | Boukhris & Willems (2008) |
| Belgium | National | Design rainfall | 30% increase | Willems (2011) |
| Denmark | National | Design rainfall | 20, 30 and 40% increase for return periods 2, 10 and 100 years | Arnbjerg-Nielsen (2008) |
| Germany | Bavaria | Design flood with 100-year return period | 15% increase | Hennegriff et al. (2006) |
| Germany | Baden-Würrtemberg | Design floods | Increase between 0 and 75% depending on location and return period | Hennegriff et al. (2006) |
| Norway | National | Design floods | 0, 20 and 40% increase based on region, prevailing flood season and catchment size | Lawrence & Hisdal (2011) |
| Sweden | National | Design rainfall | Increase between 5 and 30% depending on location | SWWA (2011) |
| United Kingdom | National | Design floods | 20% increase for 2085 | DEFRA (2006) |
| United Kingdom | National | Design rainfall | 10, 20 and 30% increase for 2055, 2085 and 2115 | DEFRA (2006) |