冻结对沙丘土壤抗风蚀能力的影响

李锦荣; 韩兆恩; 唐国栋; 杨旭; 豆春花

doi:10.13870/j.cnki.stbcxb.2025.01.014

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冻结对沙丘土壤抗风蚀能力的影响

更新时间：2025-03-14

- 冻结对沙丘土壤抗风蚀能力的影响
- Effect of Freezing on Wind Erosion Resistance of Sand Dune Soil
- 水土保持学报 2025年39卷第1期页码：38-45
- 作者机构：
  
  1. 中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京,100038
  2. 内蒙古自治区水利事业发展中心,呼和浩特,010020
  3. 呼和浩特市水质监测中心,呼和浩特,010020
- 作者简介：
  
  [ "李锦荣(1980—), 男, 正高级工程师, 博士, 硕士研究生导师, 主要从事荒漠化防治研究。E-mail: lijinrong918@126.com" ]
- 基金信息：
  
  国家自然科学基金项目(42071021)内蒙古自治区防沙治沙科技创新重大示范工程项目(2024JBGS0013)
- DOI：10.13870/j.cnki.stbcxb.2025.01.014
  中图分类号： S157.1
- 纸质出版：2025
- 稿件说明：
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李锦荣, 韩兆恩, 唐国栋, 等. 冻结对沙丘土壤抗风蚀能力的影响[J]. 水土保持学报, 2025,39(1):38-45.

LI Jinrong, HAN Zhaoen, TANG Guodong, et al. Effect of Freezing on Wind Erosion Resistance of Sand Dune Soil[J]. 2025, 39(1): 38-45.
李锦荣, 韩兆恩, 唐国栋, 等. 冻结对沙丘土壤抗风蚀能力的影响[J]. 水土保持学报, 2025,39(1):38-45. DOI： 10.13870/j.cnki.stbcxb.2025.01.014.

LI Jinrong, HAN Zhaoen, TANG Guodong, et al. Effect of Freezing on Wind Erosion Resistance of Sand Dune Soil[J]. 2025, 39(1): 38-45. DOI： 10.13870/j.cnki.stbcxb.2025.01.014.

摘要

目的明确冻结作用对沙丘土壤可蚀性及抗蚀性的影响，可加深黄河乌兰布和沙漠段冬季风沙入黄过程机理的认识，并为区域入黄沙量建模与估算提供重要科学依据。方法通过流动沙丘迎风坡表层干沙、湿沙及冻结土层的沙粒粒径筛分试验和不同水分冻结前后的土壤进行抗剪强度测试，研究沙丘土壤冻结后抗风蚀能力。结果沙丘不同坡位沙粒在水分的黏结作用下粒径增加，粒径峰值由0.15~0.2 mm向0.3~0.355 mm集中，约35.12%细砂颗粒黏结在一起形成较大的中砂颗粒。冻结后出现极细砂，粒径峰值为0.5~0.6 mm，沙粒发生黏结粗化，形成粒径更大的粗砂、极粗砂(52.02%)，沙物质易蚀颗粒质量分数降低至23%~36%，较难蚀颗粒质量分数升高至53%~63%，难蚀颗粒升高至2%~17%。随着沙丘土壤水分增加，冻结后土壤的黏聚力显著增大(p＜0.05)，沙丘土壤内摩擦角呈波动增加趋势，差异不显著(p＞0.1)，抗剪强度和抗蚀性呈极显著增加(p＜0.01)。冻结使得沙丘土壤沙粒黏结发生粗化，较难蚀和难蚀颗粒升高(占70%)，抗剪强度提高0.14%~13.07%，抗蚀性增大0.6%~2.2%。冻结可有效提高沙丘土壤抗蚀性，抑制风蚀。结论研究结果可为冻结期沙丘风蚀“裸斑”抗风蚀能力研究提供理论依据。

Abstract

Objective To investigate the effect of winter soil freezing on soil erodibility and anti-erodibility in the Yellow River section of the Ulan Buh Desert.Methods Particle size screening experiments were conducted on dry

wet

and frozen sand on the windward slope of mobile dunes

along with shear strength tests before and after freezing.Results Sand particle sizes at three positions on the dunes increased due to the bonding effect of water. The particle size peak shifted from 0.15—0.2 mm to 0.3—0.355 mm

with approximately 35.12% of fine sand particles bonding to form larger

medium sand particles. After freezing

very coarse sand emerged

and the particle size peak shifted to 0.5—0.6 mm. Sand particles bonded and coarsened

forming coarse and very coarse sand (52.02%). The proportion of highly erodible particles decreased to 23%—36%

while moderately erodible particles increased to 53%—63%

and hard-to-erode particles increased to 2%—17%. As soil moisture in the dunes increased

the cohesion of frozen soil significantly increased (p < 0.05)

along with shear strength and erosion resistance (p < 0.01). Freezing coarsened sand bonds in dune soil

increasing the proportion of moderately and hard-to-erode particles (up to 70%)

shear strength by 0.14%—13.07%

and erosion resistance by 0.6%—2.2%. Freezing could effectively improve the corrosion resistance of sand dune soil and inhibit wind erosion.Conclusion The research results can provide a theoretical basis for the wind erosion resistance of dune wind erosion "bare spot" in freezing period.

关键词

Keywords

references

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