HR Wallingford - Overtopping

Introduction

Welcome to an online Calculation Tool that will guide you through a series of steps to establish empirical overtopping predictions as described in Chapters 5 to 7 of the manual. By clicking on graphical representations of structure types and structural features, and by adding the dimensions of the geometric and hydraulic parameters, a range of outputs will be calculated and displayed online.

The following features are available:

Calculates mean overtopping discharge, overtopping volumes and number of overtopping waves.
Calculate flow velocity and flow depths of waves overtopping sloping structures.
Provide information and support for required data input.
Suggest use of the Neural Network prediction tool when appropriate.

An additional tool is now available which can be incorporated into the Calculation Tool. Developed from the Dutch (TAW) overtopping manual, this tool can be accessed through the 'PC Overtopping' tab. The tool is based on the methods originally described in TAW and in chapter 5 of the new Eurotop manual.

All structure types and the methods available for a specific structure can be found on this page within the groups below. Icons have been added to each method to help navigate you to the safest route of calculation.

The Icons listed below indicate the following:
	Recomended Method
	Method should be used with reference to user manual

Please select a structure and method from one of the groups below.

Vertical & Steep Seawalls

Vertical Wall	Vertical Wall with Wave Return	Vertical Wall with Toe Armour	Vertical Wall with Toe Armour and Wave Return	Vertical Wall with Composite Wave Return and Toe Armour

Methods Available:	Methods Available:	Methods Available:	Methods Available:	Methods Available:
Empirical Method Neural Network	Empirical Method Neural Network	Empirical Method Neural Network	Empirical Method Neural Network	Neural Network

Stepped Structures

Stepped Structure	Stepped Structure with Toe Armour	Stepped Composite with Toe Armour and Wall	Stepped Wall with Toe Armour	Slope with Promenade and Wave Wall	Slope with Stepped Wave Wall

Method Available:	Method Available:	Method Available:	Method Available:	Method Available:	Method Available:
Neural Network	Neural Network	Neural Network	Neural Network	Neural Network	Neural Network

Coastal Dikes & Embankment Seawalls

Simple Slope	Simple Slope with Toe Detail	Composite Slope	Composite Slope with Wall	Slope with Berm	Slope with Berm and Toe Detail

Methods Available:	Methods Available:	Methods Available:	Methods Available:	Methods Available:	Methods Available:
Empirical Methods PC Overtopping Neural Network	PC Overtopping Neural Network	Empirical Method PC Overtopping Neural Network	Empirical Method PC Overtopping Neural Network	PC Overtopping Neural Network	PC Overtopping Neural Network
Slope with Berm and Wall

Methods Available:
PC Overtopping Neural Network

Armoured Rubble Slopes & Mounds

Armoured Simple Slope	Armoured Slope with Toe Detail	Armoured Composite Slope	Armoured Composite Slope with Crest Berm	Armoured Slope with Berm	Multi Layer Bermed Armour

Methods Available:	Methods Available:	Methods Available:	Methods Available:	Methods Available:	Methods Available:
Empirical Methods Neural Network PC Overtopping	Neural Network PC Overtopping	Empirical Methods Neural Network PC Overtopping	Empirical Methods Neural Network	Neural Network PC Overtopping	Neural Network PC Overtopping

Stepped & Composite Structures

Bermed Armour with Wave Wall	Wave Wall with Rock Berm	Vertical Wall with Rock Berm

Methods Available:	Methods Available:	Methods Available:
Neural Network	Neural Network	Neural Network

If your required structure is not represented in the images above then please contact us for further help.

Disclaimer

These methods and tools are provided free of charge and can assist in establishing preliminary predictions for overtopping discharges for the structure types discussed in the EurOtop manual. They are not intended to be used for detailed design or assessment of structures subject to wave overtopping. It is recommended that detailed design or assessment of any structure use hydraulic model testing to verify the overtopping discharges where this is practicable. Use of the tools and methods available on this website assumes that the user has read and understood the EurOtop - Wave Overtopping of Sea Defences and Related Structures: Assessment Manual.

HR Wallingford Ltd, the Environment Agency and the EurOtop partners ("the Partners") shall not liable for the performance of a structure which is based upon the output of this website nor shall the Partners be liable for inaccuracies in the output from any use of the methods and tools provided. The Partners accept no liability for any loss or damage suffered by the user of the methods and tools provided or damage suffered by any third parties as a result of errors or inaccuracies in the methods the tools or their respective outputs.