Correction: Field determination of the hydraulic conductivity of a compacted sand layer controlling water flow on an experimental mine waste rock pile

Correction: Hydrogeology Journal

https://doi.org/10.1007/s10040-020-02129-7

Equations 4 and 5 were incorrectly displayed in the original article. The corrected equations are:

$$ \mathrm{KC}:{k}_{\mathrm{sat}}=\frac{C\cdot g}{\mu_{\mathrm{w}}{\rho}_{\mathrm{w}}{S}_{\mathrm{S}}^2{D}_{\mathrm{r}}^2}\cdot \frac{e^3}{\left(1+e\right)} $$

(4)

where k_sat is the saturated hydraulic conductivity (cm s⁻¹), g is the gravitational constant (9.81 m s⁻²), μ_w is the dynamic viscosity of water (≈ 10⁻³ Pa s at 20 °C), ρ_w is the density of water (998 kg m⁻³ at 20 °C), e is the void ratio (−), S_S is the specific surface (m² kg⁻¹ of solids) given by the Chapuis and Légaré (1992) equation, D_r is the relative density of the solid grains (−) and C is a factor that takes into account the shape and tortuosity of pore channels (≈ 20 for k_sat expressed in cm s⁻¹).

$$ \mathrm{KCM}:{k}_{\mathrm{sat}}={C}_{\mathrm{G}}\frac{\gamma_{\mathrm{w}}\cdot {e}^{3+x}}{\mu_{\mathrm{w}}\left(1+e\right)}{C}_{\mathrm{U}}^{1/3}{d}_{10}^2 $$

(5)

where C_G (= 0.1, for k_sat, in cm s^-1),) and x (= 2) are two constants for granular materials; C_U (= d₆₀/d₁₀) is the uniformity coefficient (−) and d₁₀ and d₆₀ are the diameters (cm) corresponding to 10% and 60% passing on the cumulative grain-size distribution curve.