Dear authors,
as you have seen, the two reviewers do in general appreciate your analysis, but they also provide a list excellent and detailed comments and suggestions. I strongly encourage you to address all points with due and to incorporate the necessary changes in a revised version of your manuscript.
Best regards,
Markus Hrachowitz

Dear authors,
thank you for your efforts to strengthen your manuscript and to address the comments of the reviewers.
I have received one additional review and together with my own reading of your work, I think that you have done a careful and good job in addressing the previous comments.
The reviewer raises a few more minor points that should be addressed before the manuscript can be considered for publication.
I particularly agree with the point that the very real possibility of groundwater export (or import) needs to be acknowledged as potential source of uncertainty, as for example demonstrated in Bouaziz et al. (2018) and Hulsman et al. (2021). Please do not feel obliged to cite these papers as they are papers of my research group. However, you may find them useful as background information.
I am looking forward to receiving a revised version of your manuscript,
best regards,
Markus Hrachowitz

References:
Bouaziz, L., Weerts, A., Schellekens, J., Sprokkereef, E., Stam, J., Savenije, H. and Hrachowitz, M., 2018. Redressing the balance: quantifying net intercatchment groundwater flows. Hydrology and Earth System Sciences, 22(12), pp.6415-6434.

Hulsman, P., Hrachowitz, M. and Savenije, H.H., Improving the representation of long‐term storage variations with conceptual hydrological models in data‐scarce regions. Water Resources Research, p.e2020WR028837.

Dear authors,
thank you very much for the addressing the remaining reviewer comments and incorporating some additional adjustments. I am glad to accept the current version of the manuscript as is for publication in HESS. Congratulations on an interesting contribution!
Best regards,
Markus Hrachowitz