I believe that this study will be interesting to many readers. The research was very well designed. It documented considerable variability in runoff response. The manuscript provides clear and detailed information for the readers to understand the results and make their own interpretation/conclusions.

• Reference to climate change in lines 72-73 is not needed, the topic is interesting in itself.
• l. 270 – I did not find figure S4 in the Supplement
• l. 310 mentions relations with TWI and local slope. It might be good to note that TWI considers slope as well.
• Fig. 5 shows that that there was quite a lot of “No data” for events with ASI+P smaller than approximately 38 mm. Could that have an influence on the interpretation of results?
• l. 337 - Is it possible to say why was namely event on August 30 chosen? Fig. S8 shows that there two events with total precipitation of 20 mm with enough data recorded. Is it possible/useful to comment on similarities/differences (and their probable reasons) of runoff ratios at the same plots during those two events?
• For the consistency with the main text it would be better to write figure captions in the Supplement below the figures as well.

This study used hydrological measurement network consisting of 14 small 60 runoff plots (1 m x 3 m) across the 20 ha Studibach catchment in the Alptal, Switzerland to analyze the occurrence of OF and TIF, their controlling factors and threshold. One of the major concerns is that at plot-scale, soil properties mainly governs the runoff dynamics, however, this study didn’t discuss role of soil characteristics (texture, hydraulic conductivity and parameters of soil water retention curve) in explaining variation of OF and TIF.

Further, It is not very clear how TIF was measured in the field. Please explain it.

Line 194: On what basis authors divided the low-, medium-, and high- intensity rainfall ranges.

Topsoil interflow (TIF): at what depth TIF takes place?

Line 435: “Indeed, the Spearman rank analysis indicates that ROF was negatively correlated to ASI for plots with a low TWI and positively correlated for plots with a high TWI (Figure S5)”: what would be the possible reason?

Line 490: The fast response of both flow pathways highlights the importance of preferential flow and suggests considerable interaction between OF and TIF. How the fast response of OF highlights the importance of preferential flow.

• Add legend titles to Figures 2 and 3.
• Add legend titles to Figures S8 and S9