The following probabilities are available for river flooding: - High - 10 year return period - Medium - 200 year return period - Low - 1000 year return period and 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.

The river hazard maps show (where available): - Flood extent - Flood depth - Flood velocities where appropriate.

The climate change scenario has been defined by United Kingdom Climate Projection 2009 (UKCP09) predictions for 2080s high emissions 67th percentile.