Berm breakwaters; hydrodynamics, forces and profile-development

The wave motion on-and-in Berm breakwaters as well as the reshaping process have been studied. Measurements were carried out to study wave interaction with a reshaped Berm breakwater. These tests were used for verification of a numerical model capable of simulating both the wave motion on as well as inside the structure. This numerical model has...

Stationary and oscillatory flow through coarse porous media

Measurements in a U-tube tunnel were carried out to study flow through coarse granular material. Tests with stationary flow and tests with oscillatory flow were done to study the differences between both. The coefficients from the extended Forchheimer equation, which is supposed to describe non-stationary porous flow, were determined. It...

Numerical model for wave action on and in coastal structures

In the MAST-G6-S program numerical models will be developed for the description of wave motion on and in coastal structures. The most accurate one will probably be the SKYLLA model. That model uses the two-dimensional Navier-Stokes equations. For a description, see Broekens and Petit (1991). After it has been developed for structures with an...

Formulae to describe porous flow

For the description of porous flow the Forchheimer equation is normally used. Several formulae have been proposed for the coefficients Cl and c2 from this equation. All these formulae are based on experiments. Those coefficients represent the friction and resistance caused by the porous medium. The Forchheimer equation is a somewhat semi...

Manual on Protection and Control of Coastal Erosion in India

I. Introduction I. I General review on causes of beach erosion I·2 Rise of sea level 1·3 Heavy storms, storm surges, wave action and its seasonal effects 1.4 Littoral drift barriers, natural and man-made conditions in India 2· Beach Surveys 2.1 Bathymetric surveys 2.2 Sand sampling and analysis 2,2.1 Sand sampling 2.2.2 Sample analysis 2·2.3...

Symposium "Research on wave action": Proceedings, Delft Hydraulics Laboratory, Delft, The Netherlands, July 1969

Contains papers and discussions of the symposium: de Jong, J. - New wind waves flumes; Wiegel, R.L. - Waves and their effects on pile-supported structures; Svasek, J.N. - Statistical evaluation of wave conditions in deltaic areas; d'Angremond, K. and Van Oorschot, J.H. - Generation of irregular waves on model scales; Rogan, A.N. - A comparison...

Classification des digues

Development of a formula for the stability of rubble mound breakwaters.