Improvement and Application of Soil Crust and Erodibility Factors in RWEQ Model

GONG Guoli; HUANG Lin

doi:10.13961/j.cnki.stbctb.2018.02.044

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Improvement and Application of Soil Crust and Erodibility Factors in RWEQ Model

- Improvement and Application of Soil Crust and Erodibility Factors in RWEQ Model
- Bulletin of Soiland Water Conservation Vol. 38, Issue 2, Pages: 271-274(2018)
- 作者机构：
  
  1. 山西能源学院,山西,太原,030006
  2. 中国科学院地理科学与资源研究所,北京,100101
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.02.044
  CLC：
- Published：2018
- 稿件说明：
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GONG Guoli, HUANG Lin. Improvement and Application of Soil Crust and Erodibility Factors in RWEQ Model[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 271-274.
DOI：

GONG Guoli, HUANG Lin. Improvement and Application of Soil Crust and Erodibility Factors in RWEQ Model[J]. Bulletin of Soiland Water Conservation, 2018, 38(2): 271-274. DOI： 10.13961/j.cnki.stbctb.2018.02.044.

摘要

[目的]将基于中国土壤粒径分级标准的土壤普查数据应用到RWEQ模型中，旨在解决不同土壤粒径分级标准间土壤质地资料的转换问题。[方法]利用对数正态分布模型进行土壤粒径转换，并探讨该模型在描述内蒙古自治区、吉林省、陕西省等地区土壤粒径分布中的适用情况。[结果]对数正态分布模型能够较好模拟土壤颗粒含量。土壤结皮因子和土壤可蚀性因子高值区均分布于中国北方风沙土区，其次为寒钙土等地。[结论]结皮可降低或增加土壤可蚀性，未来研究的关键在于确定不同气候条件下，引起地表结皮而将土壤风蚀可蚀性降到最低时的降雨量。

Abstract

[Objective] In order to solve the problems about transferring the existing data of soil texture between different standards

the soil census data based on Chinese soil particle size classification standard were applied to revise the wind erosion equstion model(RWEQ).[Methods] This thesis tried to use the lognormal distributed model to convert the soil particle size and discussed the applicability and feasibility of lognormal distributed model in describing the character of soil particle distribution in Inner Mongolia Autonomous Region

Jilin Province

and Shaanxi Province

etc.[Results] The research result showed that lognormal distributed model can well simulate the content of soil particles. The regions with high soil crust factor and soil erodible fraction are those windy desert region in Northern China

followed by the regions with frigid calcic soils.[Conclusion] Soil crust factor can either decrease or increase erodible fraction in different cases. Determining rainfall amount that soil surface can crust and subsequently minimize the soil wind erodibility in different climate conditions should be the key to the future.

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