Hydrogeol J (2005) 13:549–554

Form as it appears at the top of page 551:

$$ \begin{aligned} & {\left( {R_{o} + \Delta R_{o} } \right)} - {\left( {D_{o} + \Delta D_{o} } \right)} - P + \frac{{dV}} {{dt}} = 0 \\ & {\left( {R_{o} + 0} \right)} - {\left( {D_{o} + \Delta D_{o} } \right)} - P + 0 = 0 \\ & R_{o} - {\left( {D_{o} + \Delta D_{o} } \right)} = P R_{o} = P + {\left( {D_{o} + \Delta D_{o} } \right)}. \\ \end{aligned} $$

As it should appear:

$$ \begin{aligned} & {\left( {R_{o} + \Delta R_{o} } \right)} - {\left( {D_{o} + \Delta D_{o} } \right)} - P + \frac{{dV}} {{dt}} = 0 \\ & {\left( {R_{o} + 0} \right)} - {\left( {D_{o} + \Delta D_{o} } \right)} - P + 0 = 0 \\ & R_{o} - {\left( {D_{o} + \Delta D_{o} } \right)} = P \\ & R_{o} = P + {\left( {D_{o} + \Delta D_{o} } \right)}. \\ \end{aligned} $$

Reference Sophocleous and Devlin (2004) should read:

Sophocleous MA, Devlin JF (2004) Discussion of “The water budget myth revisited: Why Hydrogeologists model,” by J.D. Bredehoeft. Ground Water 42(4):618