Round 1

Reviewer 1 Report

Please consider a very thorough languange revision. Some parts of the manuscript were almost impossible to comprehend. 

Please refer to the pdf for more specific comments.

Comments for author File: Comments.pdf

Author Response

AUTHORS’ REPLIES IN ITALICS:

 

Rev 1

Please consider a very thorough language revision.

Thanks for pointing out the English inaccuracies. A language revision has been performed on the paper.

Figure 1:

Drainage network colors do not correspond to the one in the Legend.

2.There is a linear symbol (red-white stripes) in the map that does not appear in the Legend.

Red striped linear symbol in the map has a different width in the Legend. Please rephrase "Stream network Strahler order" to "Drainage network - Strahler classification". Please remove North arrow. Vertical grid line indicates the direction of North.

 

Thanks for noticing and pointing out these inconsistencies. Corrections have been performed in the new figure 1.

Row 118-119

Please add a lithological map. If the basin is strongly influenced by geology then it is important to show it on a separate map.

Thanks for pointing out this aspect. In the first draft of the manuscript we had included a geological sketch map (see below), but then decided not to include it because of the high number of Figures and Tables already present in the paper. Our line of reasoning for this choice was the consideration of the non-strictly geological nature of the paper. We though that the text explaining the general geology of the area could be enough. Indeed, if there are no limits with the number of figures we could reinsert it in the manuscript. The geological map is hereafter.

 

Lithological sketch map of Bisagno catchment: a) alluvial deposits (Quaternary), d) debris cover, arg) stiff fissured clays, cm) marly limestone flysch, ag) clayey shales, as) marls and slates.

 

Another reason not to include the geological map was that the visual abstract of the paper does provide a glance of the overall geological setting of the study area. The visual abstract is possibly a more significant sketch map regarding the aim of the paper. Please find this map hereafter.

 

 

Man-made landforms (sensu Rosembaum et al., 2003) in the Bisagno stream catchment

Modified river networks: 1. artificial rivernetwork; 2. Culvert; 3. Weir; 4. Riverbank

Made grounds: 5. Dump; 6. landfill, embankment; 7. motorway; 8. Railway

Worked grounds: 9. active quarry; 10. inactive quarry; 11. excavation surface; 12. drainage channel (final design)

Infilled grounds: 13. Road

Landscaped grounds: 14. Buildings; 15. terraces with dry-stone walls)

Geo-hydrological hazard: 16. Landslide/DSGSD; 17. Floodable areas

 

Row 123-125:

Please rephrase. The sentence is unclear

The sentence has been re-written and is visible with the track changes function in the manuscript file.

 

Row 134:

please enter a range of values.

Proper values have been added.

 

Row 134-135:

please rephrase. The sentence is vague.

The sentence has been re-written and is visible with the track changes function in the manuscript file.

 

Figure 2

How was the classification of floodable areas produced? If it was derived from the literature, please add a reference.

A proper citation has been added.

 

Row 155:

What do you mean? Please find a more suitable word and rephrase through the whole manuscript.

The terms are sensu Rosembaum et al. in references [58].

 

Row 179-182:

Please rephrase this part of the paragraph. It is almost impossible to understand.

Sentences have been re-written and extended and is visible with the track changes function in the manuscript file. Thank you for pointing out the problems of this paragraph. We hope that the editings have improved the Methods section.

 

Figure 3a:

Please add a Legend referring to the two different colors (red and purple). If they both represent urbanization, then why do you use two different colors?

Colors have been rectified and now the red color correspond to urbanization.

 

Figure 3b:

I can see some streams in red over the NNW part of the map. Why not the rest of the drainage network? Either add it all or remove it all.

The red lines in the NNW part of the map are meant to symbolize debris flows (not streams).

 

Row 239:

I am not sure if this term is correct. Do you mean boost?

The term has been clarified.

 

Row 272-274:

Please move this part to the methods.

The sentence has been moved to the Methods section.

 

Figure 10:

Please change the title to "Change in exposed population to flood hazard in Bisagno catchment.

The title of Fig. 10 has been changed according to the request.

 

Figure 11:

What do the numbers in brackets correspond to?

What do the different colored circles and squares correspond to?

Please make the Legend more comprehensive.

In formatting the previous version of the manuscript, a part of the legend of Fig. 11 was accidently erased: the full legend has been restored.

 

The numbers in brackets correspond to the number of elements/businesses in the respective classes. Colors have been used to differentiate classes exposed to floods and to landslides elements.

 

 

Author Response File: Author Response.pdf

Reviewer 2 Report

The paper is well organised and presented but some editing of language is needed as presented in my alterations.

However, I would like to see more details and suggestions regarding alleviation of the flooding problem i.e. river bypass proposal and drainage of terraces and potential landslide areas

see Attachments

Comments for author File: Comments.pdf

Author Response

AUTHORS’ REPLIES ARE IN ITALICS:

 

Rev 2

Moderate English changes required

English language has been edited throughout the paper and the Reviewer notations have been included.

 

I would like to see more details and suggestions regarding alleviation of the flooding problem i.e. river bypass proposal and drainage of terraces and potential landslide areas

A couple of paragraphs dealing with this request has been included in the “Discussion and Conclusion” section.

We thank also reviewer 2 for the insightful recommendations.

Author Response File: Author Response.pdf

Reviewer 3 Report

 

This is an interesting paper, a significant contribution to understanding the mechanisms behind geo-hydrological hazards. It is ready for publication, but, as the authors already present a record of landslides betwen 1900 and 2019, they are advised to consider that space-and-time planning for land management in the future, particularly in mediterranean areas and particularly in the case of environmental adversities, should follow the “inherent” spatial and temporal scales of the environmental hazard itself and not of the scales “imposed” by beaurocratic procedures. The way to make this can be seen in

Papadimitriou,F. & Mairota, P. (1996). Spatial Scale-Dependent Policy Planning for Land Management in Southern Europe. Environmental Monitoring and Assessment, 39(1-3)47-57.

Author Response

AUTHORS’ REPLIES ARE IN ITALICS:

 

Rev 3

 …[authors] are advised to consider that space-and-time planning for land management in the future, particularly in Mediterranean areas and particularly in the case of environmental adversities, should follow the “inherent” spatial and temporal scales of the environmental hazard itself and not of the scales “imposed” by bureaucratic procedures.

Thanks for this suggestion which we found very insightful and useful to improve the paper. A specific section addressing this aspect has been added in the “Discussion and Conclusion” section. See track changes in the manuscript.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

Thank you for following the instructions. The manuscript has been segnificantly improved.