Kluwen, J.G.M. (Janneke) (2013): Physical model tests of the notional permeability on breakwaters. Version 1. 4TU.ResearchData. dataset. https://doi.org/10.4121/uuid:175deb68-3450-4200-a6fc-ad25c17513d6

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• Civil Engineering
• Land and Water Management
• Interdisciplinary Engineering

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breakwaters master thesis permeability stability

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by J.G.M. (Janneke) Kluwen

In the water laboratory three models were tested. Firstly, model 3 of Kik is repeated as model 3A, with a calculated value of notional permeability P 0.38. The construction of model 3A is build with a top layer, filter layer 1, filter layer 2 and a impermeable core. Second, another variant of model 3 of Kik is designed and tested (model 4). However, the measured damage figures were too low and therefore they could not be used to calculate a value for the notional permeability P. The construction of model four is build with a top layer, filter layer 1, filter layer 2 which is thicker as model 3A and an impermeable core. Finally, model 5 is tested with a calculated value of notional permeability of P 0.45. This model is designed from the fourth construction of Van der Meer. The construction of model 5 is build with a top layer, filter layer 1 and a permeable core with the same material of filter layer 2 of model 3A and model 4. The results of this research show that the influences of the notional permeability P exists of the ratio of the armour layer thickness and the thickness of the second filter layer. If the layer thicknesses are equal the value for notional permeability P is 0.38, which follows from model 3A. If the second layer has an infinite thickness (permeable core), the value for notional permeability P is 0.45, which follows from model 5. The value of the notional permeability P of model 5 corresponds to the design calculations of the computer model HADEER. Van der Meer discovered using this computer model that the ratio of dn50a/ dn50f = 5 has a value on the notional permeability P of 0.43 –0.44. During this research, while using two different methods, a value of the notional permeability P of 0.45 was calculated.

History

• 2013-06-25 first online, published, posted

Publisher

TU Delft

Format

media types: application/x-rar-compressed

References

• http://resolver.tudelft.nl/uuid:ee35f437-5c5f-4df3-b363-ca87c4e2f782

Organizations

TU Delft, Faculty of Civil Engineering and Geoscience, Department of Hydraulic Engineering

Contributors

• Maertens, J.
• Uijttewaal, W.S.J. (Wim)
• Van den Bos, J.P.
• Van der Meer, J.W.
• Verhagen, H.J. (Henk Jan)