Pool et al.  applied numerical simulations to study tidal fluctuations impacts on mixing and spreading of seawater intrusion salinity in a homogeneous coastal aquifer. As a part of their study, they considered the influence of landward boundary conditions and concluded that in contrast to Ataie‐Ashtiani et al.  findings their results were independent of the landward boundary conditions. In this comment, the reasons for this important discrepancy are explained.
- coastal aquifers
- tidal fluctuations