Comparison Anal ysis on Soil Anti-scourabil ity Between Undisturbed Sampling and Artificial Rainfall Plot

Liu Guo-bin; Zhang Guang-hui

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Comparison Anal ysis on Soil Anti-scourabil ity Between Undisturbed Sampling and Artificial Rainfall Plot

- Comparison Anal ysis on Soil Anti-scourabil ity Between Undisturbed Sampling and Artificial Rainfall Plot
- Bulletin of Soiland Water Conservation Vol. 15, Issue 2, Pages: 32-37(1996)
- 作者机构：
  
  中国科学院水利部水土保持研究所
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- Published：1996
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Liu Guo-bin, Zhang Guang-hui. Comparison Anal ysis on Soil Anti-scourabil ity Between Undisturbed Sampling and Artificial Rainfall Plot[J]. Bulletin of Soiland Water Conservation, 1996, 15(2): 32-37.
DOI：

Liu Guo-bin, Zhang Guang-hui. Comparison Anal ysis on Soil Anti-scourabil ity Between Undisturbed Sampling and Artificial Rainfall Plot[J]. Bulletin of Soiland Water Conservation, 1996, 15(2): 32-37. DOI：

摘要

在相同条件下

对比研究了人工模拟降雨小区(2m×2m)和用大型抗冲槽(10cm×20cm×10cm)测定的土壤侵蚀量、产沙过程及抗冲性异同。结果表明在0.65mm/min和0.84mm/min雨强15min冲刷时间内

大型抗冲槽侵蚀模数为人工降雨小区的200～400倍

但二者存在一定量关系。抗冲槽侵蚀过程与人工降雨小区呈相反趋势。径流深为小区的50～145倍

单位径流深引起的侵蚀模数为小区的5～7倍(裸地)和1.8～4.5倍(人工草地)。本文分析了二者侵蚀过程差异及形成原因。研究还发现大型抗冲槽与小型抗冲槽所测侵蚀模数存在定量关系

在一定范围内小型槽可以取代大型槽进行抗冲性测定。

Abstract

The soil loss.sediment yield and process as well as soil anti-scourability were tested on field artificial runoff plot and undisturbed soil sampling(lOcmX20cmXlOcm)under the same conditions.The result showed that soil sample washing method was 200-400times of soil loss than in the runoff plot in 15 minutes with rainfall of 0.65 and 0.84 mm/min.The erosion process in soil sample washing was different from in runoff plot.The runoff depth in former was 50~150 times and erosion modules was 5-7times(bare land)and 1.8-4.5 times(pasture)of in runoff plot.The reason of such difference was analysised.It was also found that there exited relation of sediment yield between samples of large size(lOcmX20cm XlOcm)and small size(3.5cm X 20cm X 4cm)

and sediment yield in former can be estimated by small one.

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