Dear authors,

Thank you very much for your manuscript. This study proposes the use of the fraction of event and pre-event water relative to precipitation instead of total streamflow (as commonly adopted in tracer-based hydrograph separation studies) for characterizing catchment hydrological response. Prof Daniele Penna and two anonymous referees provided three thoughtful reviews, highlighting the novelty of the approach, the strength of the results (at least for the study alpine catchment) and the clarity of the paper, also recommending publication after minor revisions.

I appreciate your detailed and constructive responses to the referee comments in the interactive discussion. They certainly made my work as handling editor straightforward. I agree with the referees that the manuscript should be in good shape for publication after a minor revision and I feel comfortable with your comprehensive responses to all comments. Please, prepare a revised paper with a letter indicating the final changes (and text location) you have made to adapt the manuscript to the referee comments.

Many thanks again.

Kind regards,
Mariano Moreno de las Heras
Handling Editor

Dear Authors,

Thank you very much for all your efforts to adapt the paper to the comments raised by the referees. Before final acceptance, please check for coherence between the changes proposed in your letter for P18L8 and the changes introduced in the manuscript for this sentence.

Kind regards,
Mariano Moreno de las Heras