NOTIONAL PERMEABILITY
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Keywords

rubble mound
breakwater
notional permeability
van der Meer

How to Cite

Kik, R., Van den Bos, J. P., Maertens, J., Verhagen, H. J., & Van der Meer, J. W. (2012). NOTIONAL PERMEABILITY. Coastal Engineering Proceedings, 1(33), structures.84. https://doi.org/10.9753/icce.v33.structures.84

Abstract

Different layer design of a rock slope and under layers has a large effect on the strengths on the rock slope itself. In the stability formula developed of VAN DER MEER [1988] this effect is represented by the term Notional Permeability with symbol P. A more open, or permeable, structure underneath the armour layer has the ability to dissipate more wave energy and therefore requires less weight of the armour layer. The influence of this parameter is thus very important in economic sense. Up until now only three configurations have been tested. In practice often intermediate structures were designed which do not correspond to the standard situations. P-values then have to be estimated in comparison with the known structures, which gives some uncertainty around the P-value. Therefore there is the demand for more validated values of the notional permeability representing other structures. During this study physical scale modelling is used to produce a value of P for a new structure.
https://doi.org/10.9753/icce.v33.structures.84
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References

Broekhoven, P.J.M. 2011. The influence of armour layer and core permeability on the wave run up, Delft University of Technology.

Burcharth, H.F. et al. 1999. Scaling of core material in rubble mound breakwater model tests, COPEDEC V Cape Town South Africa.

Burcharth, H.F. Andersen, O.H. 1995. On the one dimensional steady and unsteady porous flow equations, Coastal engineering 24, 233-257.http://dx.doi.org/10.1016/0378-3839(94)00025-S

CIRIA, CUR, CETMEF. 2007. The rock manual. The use of rock in hydraulic engineering, C683, CIRIA.

D'Angremond, K Verhagen, H.J. Roode van, F. 2009 Breakwaters and closure dams, VSSD Delft

Gent van, M.R.A. 1995 . Wave Interaction with Permeable Coastal Structures, Delft university of Technology

Holthuijsen, L. H. 2008. Waves in oceanic and coastal waters, Cambridge University Press

Heij de, J.E.J. 2001 . The influence of structural permeability on armour layer stability of rubble mound breakwaters, Delft university of Technology

Hughes, S.A. 1993. Physical models and laboratory techniques in coastal engineering, World Scientific Publishing Co.

Jumelet, H.D. 2010. The influence of core permeability on armour layer stability, Delft university of Technology

Kik, R. 2011. The notional permeability of breakwaters, Delft university of Technology

Mertens, M. 2007 . Stability of rock on slopes under wave attack, Delft university of Technology

Papadopoulos, D 2011. Damage on rock slopes under wave attack, Delft university of Technology

Schiereck, G.J. 2004. Introduction to Bed, bank and shore protection, VSSD Delft

PMid:15613122

Thompson and Shuttler 1975. Riprap design for wind-wave attack, Hydraulic research station Wallingford

Troch, P 2000 . Experimentele studie en numerieke modellering van golfinteractie met stortsteen golfbrekers, Universiteit van Gent

PMid:10997366

Van der Meer, J.W. 1988 . Rock slopes and gravel beaches under wave attack, Delft university of Technology

Vilaplana Domingo, A.M. 2010. Evaluation of the volume-exchange model with Van der Meer laboratory tests results, Delft university of Technology

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