Thank you for your response, please address the comments of the reviewers in an updated version. Very important that you address the issues of the Cd (drag coefficient) as I think most practicing engineers are interested in this value. Please note that a recent paper has been published in this field in the Canadian Geotechnical Journal: https://doi.org/10.1139/cgj-2016-0157.

Dear Authors,

Many thanks for your revised manuscript. I am going to send it to the reviewers for one more look to make sure that they are happy with the revisions. It should not take too long.

I have one final question: did you measure the "pile-up" density behind the net? In the table you report the bulk density (1600 kg/m3), but I was wondering if you have any idea of the compacted density behind the net.

Many thanks for the revisions. I read the paper again this morning and now I think the manuscript is ready to be published. The results are a valuable contribution to the problem of debris flow mitigation. Hopefully, they will find application by engineers.