摘要：Soil erosion is a complex and dynamic process. Correspondingly, as one of the main factors of soil erosion,Soil surface roughness (SSR) is also complex and dynamic in the process of soil erosion. Soil erosionprocess was divided into four stages: before the rain (S0), splash erosion stage (S1), sheet erosion stage(S2), rill-gully erosion stage (S3). The objective of this research is to make it clear how soil erosion affectsSSR in detail through evaluating the changes ofSSR in different soil erosion stages.Soil beds were operatedby four different tillage systems to shape four different surface conditions: artificial shallow ploughing (ASP),artificial deep ploughing (ADP), contour ploughing (CT),and no tillage treatment as (CK).Thirty sixexperimentswere conducted under simulated rainfall. Several indices including the standard deviation (Sd) of soil surfaceelevation, SSR, and the chain method index Cr’ were measured before and after each rainstorm. The resultshows that: ForASP,ADP, and CPtillage systems, in splash erosion stage, all the, Sd SSR, and Cr’ decreasesignificantly; in sheet erosion stage, Sd, SSR, and Cr’ continue to decrease but the quantity of change issmall; in rill-gully erosion stage, Sd, SSR and Cr’ increase obviously. For CK, all the Sd, SSR, and Cr’increase all the time. This means splash erosion and sheet erosion can decrease SSR, but the degree isdifferent. Rill-gully erosion can increase SSR, make soil surface rougher than before.
