Dear Authors,
Your submission received some positive comments from the reviewers, who however also raised some negative criticisms and highlighted a few points deserving attention and possible changes. From your responses I think you are able to make improvements in your original paper, and I encourage you to submit a revised version, together with a detailed and comprehensive point-by-point reply. Please, be advised that a possible second round of review may be required.

Dear Authors:
From the comments received during the second round of evaluation I still see that your paper should require a few changes (if you agree with them). Ref.#1, albeit happy somehow with your revision, has still evaluated the scientific significance and quality of your contribution as rather poor. It would help if an improvement might be done by trying perhaps to go more in-depth about the main drivers leading toward the attainment of a certain level of storage capacity. Moreover, Ref.#2 (prof. Guswa) have provided some useful comments and direction for improvements, which I suggest the authors should follows. Please, work a bit more on your last version of the paper and submit a new paper together with the relevant responses.

Dear Authors,
Based on your revised version and the relevant responses, I am writing to inform you that the manuscript can be accepted as it is for publication in HESS. Congratulations.
Nunzio Romano