Dear authors,
I have read with interest your manuscript "Quantifying river form variation in the Mississippi Basin using remotely sensed imagery" as well as the good set of comments you have received from the three reviewers. I recommend you take advantage of their suggestions that will improve even further your interesting manuscript.
I look forward to receiving your revised paper.
Thank you for your contribution to HESS.

Paola Passalacqua

Dear authors,
Thank you very much for submitting the revised manuscript "Quantifying river form variations in the Mississippi Basin using remotely sensed imagery" and addressing the reviewers' comments. I am pleased to accept this paper for publication on HESS.
I have a few remaining minor corrections and a question:
- I went back to the IEEE 2008 paper looking for more information on the water mask extraction. Based on my experience, the automatic extraction of a clean water mask is not a trivial task and I am interested in knowing how much manual intervention is needed to get a good water mask to input to RivWidth. The example shown in Figure 2 is pretty straightforward and I imagine the small clusters of pixels picked up around the channel are excluded based on an analysis of connected components, keeping only the largest connected component in the image (?) However, images can get much more complex. You also mention removing structures from the river and thus I imagine connectivity was enforced manually?

Minor corrections:
- Page 2, line 30 remove 'in'
- Page 5, line 3 'product'
- Figures 3 and 4 appear to have been switched. Check the figures and Section 2.3 where figures are discussed
- small typo in page 7, line 23
- Page 10, line 22, need superscript
- Page 13, line 20, Missouri

Thank you again for submitting to HESS.
Sincerely,
Paola Passalacqua