cff-version: 1.2.0 abstract: "The coefficient in the Van der Meer formula, described as the Notional Permeability P, has been determined for three different types of structures. A homogeneous structure, a structure with a permeable core and an impermeable structure. In practice structures are being build who deviate from these standard situations. Therefore there is a demand for values of P about structures other than the known standard situations. In this thesis P values are found by means of physical scale model tests. First of all two reference structures were tested. The permeable and the impermeable structure with known values of P= 0.5 and respectively P=0.1. The values found in this study are almost equal to the values above. The new structure has an impermeable core covered with a thick filter layer. On top of that an under layer is placed and finally there is a double armour layer." authors: - family-names: Kik given-names: R. (RĂ©mon) title: "The notional permeability of breakwaters: experimental research on the permeability factor P" keywords: version: 1 identifiers: - type: doi value: 10.4121/uuid:2447c7ea-3c3f-4e70-a7cb-08f217cfa968 license: 4TU General Terms of Use date-released: 2013-06-30