- Are waves included in the Coastal Flood Boundaries?
- 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 Coastal Flood Boundaries inform us about flood risk around the UK coast?
- How is sea level rise accounted for in the Coastal Flood Boundaries?
- How often is the Coastal Flood Boundaries dataset updated?
- How should I use Coastal Flood Boundaries 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 mean high water springs (MHWS) and highest astronomical tide (HAT) predicted Tide Levels by another source. They don’t match up to those in the Coastal Flood Boundaries. Which should I use?
- Levels have fallen in my area of interest since the previous Coastal Flood Boundaries 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 Coastal Flood Boundaries 2018?
- What has been done to update the Coastal Flood Boundaries in 2018?
- What has changed in Coastal Flood Boundaries 2018?
- What information is included in the extreme sea levels shapefiles?
- What is meant by Annual Exceedance Probability (AEP) and which extreme sea level probabilities are included?
- What is the accuracy of the Coastal Flood Boundaries extreme sea levels?
- What is the base year for Coastal Flood Boundaries levels?
- What is the vertical datum of the Coastal Flood Boundaries Level?
- Where can I access the Coastal Flood Boundaries data and guidance documents?
- Who should use the Coastal Flood Boundaries (CFB) data?
- Why are regular updates, and therefore likely change in the estimates, necessary?
What has been done to update the Coastal Flood Boundaries in 2018?
Created: 03 October 2019 Updated: 03 October 2019
The CFB data must be maintained to ensure it reflects the best available information and sea level science. This 2018 update is the first carried out since the project first publication in 2011.
Work was undertaken to:
apply new sea level science and improvements to statistical methods to update existing ESLs
make use of nearly 10 years of additional observational data recorded at National Tide Gauge Network (NTGN) sites since the original study, supplementary data available at NTGN sites and gauge data provided by other organisations for non-NTGN sites
extend the locations for which ESLs are provided to include Northern Ireland, Jersey, additional Scottish Islands and along priority tidal rivers and estuaries
The significant enhancements achieved by the project included improved tidal analysis, improved de-trending, an improved statistical model, improved confidence intervals and improved extremal index estimation.