European Overtopping Manual



Originally published in 2007, this pre-release of the 2016 second edition of EurOtop ‘Wave Overtopping of Sea Defences and Related Structures - Assessment Manual’ has an author team comprising experts in the field of overtopping from several European countries. As the manual presents the latest techniques and approved methods for establishing overtopping hazards and flooding for an extensive range of structure types, it has a worldwide application.

This pre-release of the second version of EurOtop contains many improvements and additions with respect to EurOtop (2007). Chapters 1-7, as given in this pre-release, may be considered as final. We are still working on an additional chapter 8 on Case studies, and on a modified Calculation Tool. When these are finalised, a final second version will be available on this website.

Please note: We are hoping to be able to supply a printed version on demand with a hard cover, available for printing costs only, which will be offered for the final version. Once this has been set up, links will be included here that will redirect you to the appropriate site.

The manual has been organised into the following 7 main chapters:

  1. Explains the scope of the manual, defines the types of structure, provides definitions for each of the parameters, and gives some guidance on how the results should be interpreted.
  2. Gives a short discussion on waves and water levels in the context of overtopping. References to more detailed explanations will be given in the text.
  3. Wave overtopping processes and hazards will be described, and guidance on tolerable discharges, and personal hazards, will be given. Discussion will explain the different ways in which waves overtop and how this should be interpreted.
  4. Describes the different methods available for predicting or assessing overtopping discharges. Whilst the remaining chapters of the manual will concentrate principally on empirical methods, this chapter will discuss the use of physical modelling and numerical techniques. This chapter will also introduce the use of the Calculation Tool, and the Appendices will give more detailed discussion of the topics covered in this chapter.
  5. 5. Embankments and Dikes: Discusses empirical wave overtopping methods for coastal dikes and embankment seawalls. This describes modifications to the methods originally described in EurOtop (2007).
  6. Rubble Mound Structures: Covers overtopping for rubble mounds and slopes, and includes new coefficients for a much wider range of armour types, but will be similar in structure to chapter 5.
  7. Vertical Structures: Overtopping at vertical and steeply battered structures will be covered in the final chapter. Considerable research in this field has been completed since the last manual was published, and the new techniques will be included here.