Dear Authors,

Two reviewers judged your manuscript. In general both reviewers are positive (ranging in qualifications from good - fair). However, both reviewers see also room for improvement . Especially, reviewer 2 provides detailed comments (closing of water balance, propagation of drought meteo-hydro, cluster analysis) for making the conclusions more significant which could improve the impact of the manuscript. Therefore, i decided for major revisions and your revised manuscript will be send out for review again.

Please adjust the manuscript accordingly and provide a point by point explanation what you changed and what (and why) not (addressing all comments of both reviewers)

Sincerely,

Albrecht Weerts

PS. For basin actual ET (modelled and constrained using observations could be obtained from http://landsaf.meteo.pt/). I believe this also covers Parana.