Application of the Caesium-137 Technique in a Study of Soil Erosion on Gully Slopes in a Yuan Area of the Loess Plateau Near Xifeng, Gansu Province, China
Application of the Caesium-137 Technique in a Study of Soil Erosion on Gully Slopes in a Yuan Area of the Loess Plateau Near Xifeng, Gansu Province, China
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DOI：
10.1080/04353676.1994.11880410
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发表时间：
1994-04
影响因子：
1.5
通讯作者：
Xin-bao Zhang;T. Quine;D. Walling;Zhou Li
中科院分区：
文献类型：
--
作者：
Xin-bao Zhang;T. Quine;D. Walling;Zhou Li
本文利用~（137）Cs技术研究了黄土高原塬区沟坡侵蚀速率的变化规律。铯-137清单所显示的模式被用来解释耕地和未耕地上的主要侵蚀过程。这些模式表明耕作的重要性，再分配和水侵蚀的耕地梯田，并建议风和水侵蚀过程中运作的草原地区。从未开垦土地上的铯-137清单得出的侵蚀速率表明，当地土壤保持站提供的61 km-2 year-1的估计值可能严重低估，尽管数据确实证实了全面植被覆盖在控制侵蚀方面的重要性。梯田耕地得出的侵蚀率与公布的估计数一致。两个梯田类型进行了检查，这些特点是差异很大的净侵蚀率，表明窄条梯田种植平行的轮廓应尽可能使用，因为这些提供了一个明确的土壤保持效益。
The caesium-137 technique has been used to derive hitherto unavailable information concerning erosion rates on gully slopes in a yuan area of the Loess Plateau in Gansu Province, China. The patterns shown by the caesium- 137 inventories were used to interpret the dominant erosion processes operating on cultivated and uncultivated land. These patterns demonstrate the importance of tillage redistribution and water erosion on cultivated terraces and suggest that both wind and water erosion processes operate on grassland areas. Rates of erosion derived from the caesium-137 inventories for the sites on uncultivated land indicate that the estimate of 61 km-2year-1provided by the local soil conservation station may be a serious underestimate, although the data do confirm the importance of full vegetation cover in controlling erosion. The erosion rates derived for terraced cultivated sites are in line with published estimates. Two terrace types were examined and these were characterized by widely divergent net erosion rates, indicating that narrow-strip terraces cultivated parallel to the contour should be used where possible, because these offer a clear soil conservation benefit.