Dear Authors,

The paper presents a technical note on the parameterisation of concentration-discharge relationships which introduces an alternative to conventional power law relationships. Both referees mentioned that the paper presents an interesting idea, is of good quality and is well written. Both referees had made some critics which will surely improve the manuscript, mainly to provide the ranges of applicability of the new parameterisation and its predictive uncertainty, to provide criteria separately not only in the calibration mode but also in the validation mode, to provide the mean concentration of the solutes in Table 5 and to add a short section showing the advantages and limitations of this new approach.

The Authors gave satisfactory answers to all points raised by both referees.

The Authors are invited to submit a revised version of the manuscript responding to all points raised by the referees.

Kind regards,

Roger Moussa

Dear Authors,

As mentionned by the reviewer, and as all main comments of the previous reviewers have been considered adequately the manuscript can be published as is.

Kind regards,

Roger Moussa