Application of Geological Mapping Using Airborne-Based LiDAR DEM to Tunnel Engineering: Example of Dongao Tunnel in Northeastern Taiwan

Round 1

Reviewer 1 Report

The manuscript is devoted to the experience of using digital technologies in engineering geological works. The authors use the latest approaches for geological mapping. In general, the manuscript is written in good scientific language. The manuscript is excellently illustrated and contains all the necessary headings.

The results of this study demonstrate that the DEM accurately reflects geomorphological features. The results obtained more fully reflect the features of the relief and individual structural elements. Compared to conventional maps, the capabilities of the approach used show a more accurate and informative result.

In my opinion, the manuscript can be published in the journal after minor corrections.

Specific remarks:

1. Figure 2. Geological map of study area - it is desirable to increase the fonts and designations of small elements.
2. Check all literature references.

 

Author Response

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Author Response File: Author Response.docx

Reviewer 2 Report

I found the paper generally interesting, as an example of application LiDAR data in some engineering geology. I see a few points where Authors may consider some minor improvements:

1. You are using term "metamorphic sandstone". As a sandstone is sedimentary rock, I suppose, metasandstone would be more suitable, as you used on a Fig. 7.
2. When you are writing about faults (lines 127, 128) I suggest using term fault zone, especially because you write about its thickness.
3. In the method section you should mention what type of hillshade you were using (traditional? multi-directional?). Also, it's not clear what's the point of introducing there aerial photos based DSM. The title of the manuscript, as well as its content is focused on the LiDAR. Consider removing this.
4. I can't see point of showing less-resolution (5 m) DEMs. As you note, it's obvious that it's sharper or it's showing more detail in the drainage network.
5. In the line 224-225 consider using word trace instead lineament.

I also can't see any discussion with a literature. I think you should improve your discussion by citing some literature about fault zones geomorphology to create better background for your study.

Author Response

Please see the attachment.

Author Response File: Author Response.docx