Dear authors,

Thank-you for your response to the two reviews, and the amended manuscript. I am satisfied that you have addressed the reviewers' concerns. In re-reading the paper, I've picked up a few other small points as follows. Please could you address these, then the manuscript can proceed for typesetting and publication.

Best wishes,
Dr Joanne Williams

For those of us less familiar with atolls, please could you briefly explain the term "faro" on first usage in 2.1?

In figure 2, I struggle to distinguish the 2 blue symbols from the background ocean colour. Please replot with a more distinct colour for the symbols (maybe magenta?)

A minor point, but please check the date of the Landsat image, it is labelled 19970203 so I guess might be February? And consider, does the height of the tide when this image was taken make much difference to the land area? I guess you can check quickly by comparing somewhere you know hasn't been changed.

In the caption for figure 8 & 9, specify whether this is an increase or decrease in grain size, not just "change". (Unless the change can be in either direction? In which case it is unclear elsewhere).

Also the caption for figure 8 needs rewording to be clear that this is the modelled result, not measurement. I suggest "Absolute difference in bed sediment grain class modelled to...." etc.

Typo in figure 7b - yellow should be "coarse"

Do you think your model will be a useful tool to test the effect of planned reclamation work or other changes?

Thank-you for providing the model source code online. Is the bathymetry available?

Please include dois for the references wherever possible.