Dear authors,
as you have seen, both reviewers highly appreciate your analysis and I largely share their opinion. They also offer a list of excellent comments, which I would encourage you to adress in detail in a revised version of your mansucript.
Giving more attention to, in particular, the following points will help further strengthening your manuscript:

1) various choices made in the analysis come across as a bit ad-hoc and should be justified and discussed in more detail

2) as noted by both reviewers, a stronger context will be welcomed. while I agree that there are few studies (if any) that analyse the probelm in such detail, it will nevertheless be interesting for the reader to have a bit closer look at the various location-specific case studies you mention.

3) A discussion of potential effects of at least some of the processes mentioned suggested by reviewer #2 will also be very interesting.

I am looking forward to receiving a revised version of your very interesting manuscript!
best regards,
Markus Hrachowitz

Dear authors,

thank you for adequately addressing the previous reviewer comments and incorporating them in your manuscript. I am pleased to accept your manuscript as is for publication in HESS. Congratulations on this interesting contribution!
Best regards,
Markus Hrachowitz