- Are Waves Included In The CFB?
- Coastal Flood Boundaries - Additional Help And Further Information
- How Are Levels Within ‘Inland Extensions’ Or ‘Estuaries’ Derived?
- How Can I Generate My Base Tide Curves?
- How Does The CFB Inform Us About Flood Risk Around The UK Coast?
- How Is Sea Level Rise Accounted For In The CFB?
- How Often Is The CFB Dataset Updated?
- How Should I Use CFB Levels In Estuaries And Tidal Rivers?
- I Am Concerned About The Large Differences In Values In Some Locations And The Effects On My Project.
- I’ve Been Given MHWS And HAT Predicted Tide Levels By Another Source. They Don’t Match Up To Those In The CFB. Which Should I Use?
- Levels Have Fallen In My Area Of Interest Since The Previous CFB Update. How Can This Be When Sea Levels Are Known To Be Rising?
- What Are The Coastal Flood Boundaries?
- What Are The Key Outputs Of CFB 2018?
- What Has Been Done To Update The CFB In 2018?
- What Has Changed In CFB 2018?
- What Information Is Included In The Extreme Sea Levels Shapefiles?
- What Is The Accuracy Of The CFB Extreme Sea Levels?
- What Is The Base Year For CFB Levels?
- What Is The Vertical Datum Of The CFB Levels?
- Where Can I Access The Coastal Flood Boundaries Data And Guidance Documents?
- Which Extreme Sea Level Probabilities Are Included And What Is Meant By Annual Exceedance Probability?
- Who Should Use This Data?
- Why Are Regular Updates, And Therefore Likely Change In The Estimates, Necessary?
What Has Changed In CFB 2018?
Created: 03 October 2019 Updated: 03 October 2019
The ESLs in the 2018 update have not changed significantly for most UK NTGN gauge sites. Differences of less than 0.1m are not considered significant as these are within the accuracy of ESL estimation. Gauge locations with changes in level larger than 0.1m for the 200-year return period include Mumbles, Newport, Barmouth (Wales), Felixstowe and Cromer (England).
Larger changes in ESLs from CFB 2011 to CFB 2018 are present at some locations in the 2km return level dataset despite smaller changes at UK NTGN gauge locations. This is due to improvements in the interpolation of levels between gauge locations. These have been validated against predicted high tides and local gauge data. Areas of greater change include the Severn Estuary, Solent, Solway Firth, Ornkey Islands, Pentland Firth and Liverpool.