Dear authors,

The revised version of the manuscript is better organised, which facilitates reading. The figures nicely illustrate the work. Three questions remain in this revised version of the text. They are mainly related to your statements on the drivers of landscape evolution (tectonic activity, climate patterns, geology).

1) In section 3.3, you use a stream power method to analyse differences in specific stream power between the present-day and ancient Duero river (L380-394). This is somehow surprising, as you state in section 3.4 that the results of stream power analyses can be biased by the quality of the topographic data - slope measurement on low-resolution DTM data. Is your argument in section 3.3 robust, or can you rephrase this argument based on the results of the X-analyses?

2) In the discussion, you comment on the link between tectonic activity and landscape evolution. Given that the landscape response time can be (very) long in these systems, can we make a firm statement yet on the drivers of landscape incision (tectonic vs. climate patterns: L501-503)?

3) The climate pattern in the wider region is studied based on modern precipitation data (Fig. 6). How relevant are such maps when we look at long-term processes, certainly when considering the climate changes mentioned in L181-206? A short discussion on the relevance of the data for reconstructing past climate change would be welcome - for example L505-519.

These issues can be addressed by revising the relevant parts of sections 3.3, 3.4 and part of the conclusion.


Looking forward to receive your revised version of the paper,

With kind regards,
Veerle Vanacker
Associate editor - ESurf

Dear authors,

Your paper nicely documents drainage reorganisation in the northern Iberian Peninsula, and is well illustrated.

Happy to recommend publication of your work,

Kind regards
veerle vanacker
associate editor - ESurf