Correction: Eldrup, M.R., et al. Stability of Rubble Mound Breakwaters—A Study of the Notional Permeability Factor, based on Physical Model Tests. Water 2019, 11, 934

The authors wish to make the following corrections to this paper [1]:

Replace Equation (6)

$$k={\displaystyle \sum }_{i=1}^{N}0.79-0.79\exp \left(-4.1\frac{D_{\mathrm{n}50,i}}{D_{\mathrm{n}50, \mathrm{A}}}\right)\left(\frac{\exp \left(-0.62z_1^{*}\right)-\exp \left(-0.62z_2^{*}\right)}{0.62}\right)$$

with:

$$k={\displaystyle \sum }_{i=1}^N\left(0.79-0.79\exp \left(-4.1\frac{D_{\mathrm{n}50,i}}{D_{\mathrm{n}50, \mathrm{A}}}\right)\right)\left(\frac{\exp \left(-0.62z_1^{*}\right)-\exp \left(-0.62z_2^{*}\right)}{0.62}\right)$$

The authors would like to apologize for any inconvenience caused to the readers by these changes. The manuscript will be updated, and the original will remain online on the article webpage, with a reference to this Correction.