Dear Authors, 

The paper presents the results of some detailed experimental studies at the laboratory scale. The topic and results are of interest to the journal.

The method and results are interesting and provide  insights to fluvial systems.  An issue that needs to be better addressed is that of the relevance of scale of the experiments and the relevance to the real world scale. This needs to be better discussed both in the discussion as well as the Conclusion.

It is also not clear what is meant by the suggestion of diffusion -  'Higher rainfall rates

(70 mm h-1 149 in this work) tend to inhibit the development of a channelized and branching channel

150 network in favor of more diffusive and mass wasting processes. This trend can be deduced by analyzing

151 the DEMs of mod1070 and mod1570 (Fig. S2), or simply by noting the diffuse nature of erosion under

152 high rainfall conditions (Fig. S3)'

It is not clear what diffusion occurs as the raindrops are small

Please explain why such a large rainfall range was used and how this scales to real world application