Dear authors,
following up on the reviews provided by the two referees and your responses to these comments, I invite you to submit a revised version of your manuscript. Please take into account the main points put forward by the referees. From your response I understand that there are certains aspects where you may disagree with one or both referees - please make sure to fully address them in your response, especially if you choose not to retain them in the main text of the revised manuscript.
Best regards,
Laurent Pfister

Dear authors,
following up on the assessment of the revised version of your manuscript it occurs that there still remain certain points that need to be addressed. As you will see from the reviewer's comments, there is more specifically the need to nuance some of your statements relative to the novel character of your work. While there is absolutely no doubt about the high relevance of your research, it would be very helpful to place it in a broader context of similar work that has already been carried out and published.
I therefore look very much forward to a revised version of your manuscript - I have no doubt that with moderate changes/edits you will be able to rapidly address the main pending points.
Best regards,
Laurent Pfister

Dear authors,
following up on the submission of your revised manuscript, I have the pleasure to let you know that your contribution is now accepted for publication in HESS.
Prior to the final processing steps, I invite you to carry out the following technical corrections to your manuscript:
1. Main text
- page 4, line 78: correct typo in 'chlorophyll' and delete 'and Co'
- page 5, line 106: change text to 'The Orgeval catchment is one of ...'
- page 8, line 186: identify JCGM acronym in the text - 'Joint Committee for Guides in Metrology'
- page 15, line 364: '... the calculated PDFs ...' (i.e. add 's' to PDF)
- page 28, line 866: '... injection of 200 g of NaCl ...' (i.e. add unit to injected NaCl)
2. Supplementary material
- page 1, line 5: change 'litter' to 'liter'
- page 1, line 23: 'The chromatograph is equipped with ...' (i.e. add 'with' to the sentence)
- page 2, line 33: same comment as for line 23 in page 1
- page 2, line 47: '... is described as follows' (i.e. add 's' to 'follow') - or change to ... 'is described hereafter'
- page 3, line 66: add 's' to 'PDF'
- page 4, line 91: 'rain' instead of 'Rain'
- page 5, line 106: add 's' to 'represent'
- page 5, line 144: add 's' to 'PDF'
Thank you for implementing these technical corrections. I look forward to receiving your final version for the final processing steps of your manuscript.
Best regards,
Laurent Pfister