Comparative Study of Quantitative Evaluation of Soil Erosion in Consideration of Terraces as Topographical Factor or Engineering One

WANG Yiren; ZHAO Mudan; ZHANG Qian; ZHANG Peng

doi:10.13961/j.cnki.stbctb.2017.02.022

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Comparative Study of Quantitative Evaluation of Soil Erosion in Consideration of Terraces as Topographical Factor or Engineering One

- Comparative Study of Quantitative Evaluation of Soil Erosion in Consideration of Terraces as Topographical Factor or Engineering One
- Bulletin of Soiland Water Conservation Vol. 37, Issue 2, Pages: 148-152(2017)
- 作者机构：
  
  西北大学城市与环境学院,陕西,西安,710127
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.02.022
  CLC：
- Published：2017
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WANG Yiren, ZHAO Mudan, ZHANG Qian, et al. Comparative Study of Quantitative Evaluation of Soil Erosion in Consideration of Terraces as Topographical Factor or Engineering One[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 148-152.
DOI：

WANG Yiren, ZHAO Mudan, ZHANG Qian, et al. Comparative Study of Quantitative Evaluation of Soil Erosion in Consideration of Terraces as Topographical Factor or Engineering One[J]. Bulletin of Soiland Water Conservation, 2017, 37(2): 148-152. DOI： 10.13961/j.cnki.stbctb.2017.02.022.

摘要

[目的] 根据中国土壤流失方程（CSLE），在降雨、土壤、植被等因子一定的条件下，将梯田作为地形因子计算流域土壤侵蚀量，并与梯田作为工程措施的计算结果进行对比分析，为土壤侵蚀定量评价提供新的思路。[方法] 以黄土高原地区的纸坊沟流域和燕沟流域作为试验区，利用5 m分辨率的DEM，0.3 m分辨率的WorldView 3，30 m分辨率的Landsat 8影像、降雨数据、土壤数据、土地利用等数据。[结果]（1）在纸坊沟流域和燕沟流域，坡式梯田作为地形因子的流域土壤侵蚀量大于梯田作为工程措施的流域土壤侵蚀量，同时坡式梯田作为地形因子的流域土壤侵蚀量大于水平梯田作为地形因子的流域土壤侵蚀量，而水平梯田作为地形因子的流域土壤侵蚀量与梯田作为工程措施的流域土壤侵蚀量的比较根据流域的不同结果不同。（2）梯田占流域面积比例不同时，随着梯田占比的升高，梯田作为工程措施的流域土壤侵蚀量要明显低于梯田作为地形因子的流域土壤侵蚀量。[结论] 梯田作为地形因子和工程措施因子会对土壤侵蚀量计算产生一定影响，梯田占比较大时差异明显。

Abstract

[Objective] With the using of CSLE model

we calculated the soil loss in two situations under certain conditions of rainfall

soil and vegetation: taking terraces as a terrain factor or as an engineering measure factor. It was expected to provide a new idea for quantitative evaluation of soil erosion. [Methods] This thesis choose Zhifanggou watershed and Yangou watershed of Loess Plateau as experimental sample plots and used DEMs of the study regions with a resolution of 5 meters

images of WorldView 3 with a resolution of 0.3 meters and Landsat 8 with a resolution of 30 meters

precipitation data

soil data and land use data

etc. [Results] (1) In Zhifanggou watershed and Yangou watersheds

as a terrain factor

the calculated average soil loss of watershed in slope terraces are both greater than the ones taking terraces as an engineering measure factor. However

the comparison results between the average soil loss of watershed in level terraces and taking terraces as an engineering measure factor varied in different watersheds. (2) As the increase of the proportion of terraces

the average soil loss of watershed taking terraces as an engineering measure is much lower than the one taking terraces as a terrain factor. [Conclusion] Taking terraces as terrain factor or engineering measure factor can change the calculation of soil loss

especially when the proportion of terraces is larger.

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references

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