Correction: Hydrogeology Journal (2021) 29:1539–1550

https://doi.org/10.1007/s10040-021-02327-x

Equation (10) should be corrected to:

$$ m=\frac{\mathit{\ell QCk}}{RVp} $$

Where the added V [L T-1] represents the (microscopic) flow velocity, as defined earlier in the paper.