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CLASH is concentrating on investigations of wave overtopping for different structures in prototype and in laboraty. The model investigations have focussed on wave overtopping and the comparison of overtopping results from small-scale model tests and prototype measurements. Possible differences in the results from small-scale tests and prototype were analysed with respect to measurement accuracy as well as model and scale effects. This report proposes a methodology to assess the aforementioned effects and to provide the uncertainties and correction factors for quantifying the various influences when performing model tests.

The investigation concerns the design of a new internal breakwater in the main port of Ibiza. The objective of the model tests was in the first hand to optimize the cross section to make the wave reflection low enough to ensure that unacceptable wave agitation will not occur in the port. Secondly wave overtopping was studied as well.

Overtopping and rear slope stability of reshaping and non-reshaping berm breakwaters have been studied in a wave flume. A total of 695 tests have been performed to cover the influence of crest freeboard, crest width, berm width, berm elevation, stone size and sea state. Formula for average overtopping discharge that includes these parameters has been derived. The measurements show good correlation between average overtopping discharge and rear slope damage.

This report deals with the laboratory tests performed to give additional information on overtopping of reshaping breakwaters performed at Aalborg University, 2003-2004.

The report is focussing on wave overtopping for different structures and in laboratory. The main scientific objectives of CLASH are to solve the problem of possible scale effects for wave overtopping and to produce a generic prediction method for crest height design or overtopping assessment. This report deals with the laboratory tests performed to give additional information on overtopping of reshaping breakwaters performed at Aalborg University, 2003-2004.

This report deals with the laboratory tests performed to give additional information on obliqueness, short-crested waves and directional spreading performed at Aalborg University, 2004. 736 tests have been performed to give more information on the influence of wave direction and directional spreading on wave overtopping. This report deals with the laboratory tests performed to give additional information on obliqueness, short-crested waves and directional spreading performed at Aalborg University, 2004. 736 tests have been performed to give more information on the influence of wave direction and directional spreading on wave overtopping.

A consequence of Froude-scaling of wave dominated hydraulic models is disproportion of viscosity and surface tension. The flow domain related to the action of incoming waves on a sloping porous structure changes in space and time. During the run-up phase the flow domain can be separated in a jet like surface flow domain and a porous flow domain.

Planning and design procedures for coastal projects are described.

An empirical model for time variation of overtopping discharge is verified through a comparison to experimental data. The verification is performed for a parameter range covering overtopping ramps typically used in wave energy converters utilizing overtopping.

The present paper concerns the results and findings of a physical study on wave impacts on vertical caisson breakwaters situated in irregular, multidirectional breaking seas. The study has taken place as a part of the framework programme "Dynamics of Structures" financially supported by the Danish Technical Research Council, during the period of January 97 to July 97. The tests were carried out in 3D wave basin at the Hydraulics and Coastal Engineering Laboratory, Aalborg University.

This repor concerns experiments carried out as a combined LIP-MAST-TAW PROJECT DURING May to July, 1994, in the Vinje-Basin at Delft Hydraulics

A method for development of design diagrams to ensure structural integrity of slender unreinforced concrete breakwater armour units is presented. The method is based on experimental data from small scale flume tests as well as impact loading of prototype and small scale units. A prerequisite for this is the development of a method for full scale impact testing of prototype units. The method which produces repeatable results is applicable also for quality assessment of the concrete, and is widely used today. The theoretical background for the work is the separation of the loads and related stresses into three classes: static, pulsating and impact. In principle each type is described independently, and separately scaled by appropriate scaling laws to prototype sizes. The complex stress field is characterized by the maximum principal tensilestress acting in defined critical sections. This one-parameter characterizationmakes it possible to develop simple design diagrams for engineering purposes. Specific design diagrams for integrity of Dolos armour units with the waist ratio as a variable have been produced.