[1]ZHANG Xia,JIA Lian-lian,LI Zhan-bin,et al.Study on Dynamical Variation Characteristics of Surface Roughness under Field Simulated Rainfall Condition[J].Research of Soil and Water Conservation,2012,19(04):16-20,29.
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Study on Dynamical Variation Characteristics of Surface Roughness under Field Simulated Rainfall Condition
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 04
Page number:
16-20,29
Column:
Public date:
2012-08-20
- Title:
- Study on Dynamical Variation Characteristics of Surface Roughness under Field Simulated Rainfall Condition
- Keywords:
- surface roughness; rainfall; erosion; dynamical variation
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- Soil surface roughness is one of the main factors affecting soi1 erosion. To further determine effects of soil surface roughness on the erosion, dynamical variation characteristics of surface roughness, variation regularity and affecting factors were obtained under following conditions, i.e. rainfall sequence, slope, vegetation coverage and spatial slope section through field simulated rainfall experiment. Results showed that surface roughness was always affected by the above factors during rainfall period. Soil surface roughness increased with rainfall events. The richer the vegetation coverage was, the less the surface roughness was. The steeper the slope was, the more increase extent of surface roughness was, and the more obvious of increase tendency was in experimental range. The variation rules of each slope section were overall following the above patterns, but there was spatial variability in some slope sections. Due to the spatial variability, some slope section’s function was water storage and sediment reduction as well as erosion reduction. On the contrary, the effect on sediment and runoff was potential flushing and erosion aggravation in other slope section. The factors and interaction effect were the main affecting factors on variation of surface roughness. The results provide theoretic basis for revealing the erosion characteristics through soil surface roughness, and at the same time, it can serve for controlling soil and water loss on the Loess Plateau.
- References:
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Last Update:
2014-01-06