The authors provided a detailed response following the previous review, and made various important changes. Comparison between the two versions is complicated since no document was provided indicating where changes were made exactly. Some text in the revised manuscript was highlighted, but many more changes were made that were not highlighted.
Despite the positive changes, I consider the paper requires some further revisions and clarification of several inconsistencies before publication.
Most importantly, the authors have added hypothesis to the introduction section, which could be a good idea, but in its present form seems artificial and poorly worked out. The hypotheses do not link to the research questions and at various points in the manuscript (especially discussion) reference is made to hypotheses that are not in the introduction. The paper could benefit from a much better explanation of its main objectives and a structured and systematic elaboration of these objectives and/or hypothesis in the discussion and conclusions.
L 283: (Depositional hillslope positions…) is this not in contradiction with previous sentence that no significant differences were found?
L302: previous sentence says that higher elevation soils are more acidic, not lower elevation soils. Please correct or clarify.
L333: The number 15.6 kg ha refers to bioturbation?
L334-337: I don’t understand the point you are trying to make here. First of all, sediment export rates are strongly dependent o the size of the catchment (see for example Walling 1983; Journal of Hydrology 65, the Sediment Delivery Problem), making comparison between catchments of different size meaningless. Second, why would the fact that you find agreement with other catchments mean that ‘there are still erosive forces that mobilize sediment in non-flood years’?
L341: to which hypothesis of the introduction does this relate?
L355: you mean chemical composition of sediments?
L354-355: What exactly does this mean and how does it support (or not) your hypothesis regarding the relation btw sediment composition and rainfall/discharge versus catchment characteristics?
L359: It seems likely that spatial variability in catchment characteristics is so limited that it is to be expected that this will not affect your sediment composition, as you also state later on? Besides, what about the significant correlation with source catchment mentioned in L265?
L363: so what does this say about the importance of lateral C fluxes for the C budget?
L368: they = there
L395: and low ER for wet years, possibly pointing at erosion of deeper soil layers, or loss from the sediment basins?
L440: on which of your results is this statement based? On the fact that erosion rates are low and therefore not likely to form an important sink? Please clarify.
L441: climate change is likely to affect temperature and annual rainfall volume, so most likely also discharge, but probably vegetation cover and so protection against soil erosion will also be affected by climate change.
L449: what about results in Figure 4 showing a significant negative correlation between discharge and C concentration? This conclusion seems to contradict your discussion section stating that discharge is important for sediment composition?
L452: eroding sediments, eroded sediments, or simply sediments?
L452-453: sediment mobilization = erosion?
L457: your study did not test differences in timing; only inter annual precipitation differences but not timing within the year, right? Your results do show that not form of precipitation but total volume is important.
Figure 4: The legend in these figures shows negative R^2 values. These should probably be r values not R^2?
Figure 6: please add legend with hillslope positions (that was present in previous version of the graph).