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利用7Be示踪方法,研究次降雨条件下浅沟集水区片蚀的空间分布特征.结果表明:次降雨发生前后,7Be在浅沟集水区不同部位发生显著的空间分异,7Be含量的差值随坡长整体上呈波动趋势,坡面上部在0～10m范围内侵蚀强度较弱,局部区域有沉积发生,在坡面中部坡长为45～50 m左沟脊处土壤侵蚀相对严重,坡长大于75 m的坡面下部,土壤侵蚀也较严重.
The 7Be tracing method was used to study the spatial distribution of eclipses in shallow gully watershed under secondary rainfall.The results showed that there was a significant spatial difference of 7Be in different parts of shallow gully catchment before and after rainfall occurrence.The content of 7Be The difference tends to fluctuate with the slope length as a whole. The erosion intensity in the upper part of the slope is weaker in the range of 0 ~ 10m, and the sedimentation occurs in the local area. Soil erosion is relatively serious at the slope of 45 ~ 50m in the middle part of the slope , The slopes of which the slope length is more than 75 m have more serious soil erosion.