Variation Characteristics of Sediment Transport for a Vertical Gauze Sand Barrier During Different Sampling Seasons

Yan Deren; Yang Zhiguo; Gao Haiyan; Huang Haiguang; Hu Xiaolong

doi:10.13961/j.cnki.stbctb.2022.04.017

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Variation Characteristics of Sediment Transport for a Vertical Gauze Sand Barrier During Different Sampling Seasons

- Variation Characteristics of Sediment Transport for a Vertical Gauze Sand Barrier During Different Sampling Seasons
- Bulletin of Soiland Water Conservation Vol. 42, Issue 4, Pages: 129-134(2022)
- 作者机构：
  
  内蒙古林业科学研究院/沙地生物资源保护与培育国家林业和草原局重点实验室,内蒙古,呼和浩特,中国,010010
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2022.04.017
  CLC： S157;S775
- Published：2022
- 稿件说明：
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Yan Deren, Yang Zhiguo, Gao Haiyan, et al. Variation Characteristics of Sediment Transport for a Vertical Gauze Sand Barrier During Different Sampling Seasons[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 129-134.
DOI：

Yan Deren, Yang Zhiguo, Gao Haiyan, et al. Variation Characteristics of Sediment Transport for a Vertical Gauze Sand Barrier During Different Sampling Seasons[J]. Bulletin of Soiland Water Conservation, 2022, 42(4): 129-134. DOI： 10.13961/j.cnki.stbctb.2022.04.017.

摘要

[目的] 对不同规格纱网沙障春季、夏秋季的输沙量变化特征进行定位连续测定，为进一步评价纱网沙障的固沙效果提供科学依据。[方法] 采用野外定位、定期观测方法，研究不同季节纱网沙障的输沙量变化特征。[结果] 无论是春季，还是夏秋季，设置2 m×2 m，3 m×3 m，3 m×4 m和4 m×4 m的纱网沙障对风沙流的拦截效果随着网格变小而增加，且输沙量随高度变化趋势线均呈现指数关系。来自西北风方向的输沙量大于东南风方向的输沙量，且春季输沙量大于夏秋季输沙量。和对照相比，春季3 m×4 m纱网沙障0—60 cm高度拦截的净输沙量降低了85.98%，而夏秋季降低了79.56%。[结论] 纱网沙障输沙量主要集中在地表20 cm及以下高度范围，并随着纱网沙障规格增加其降低输沙量能力减少。设置纱网沙障能有效减少风沙流危害。

Abstract

[Objective] The variation characteristics of sediment transport for different specifications of gauze sand barriers in spring

summer and autumn were obserred continuously in order to provide a scientific basis for further evaluation of the sand-fixing effect of gauze sand barriers.[Methods] Field positioning and regular observation methods were used to determine the amount of sediment transport for gauze sand barriers in different seasons in the Ulanbuh Desert.[Results] The 2 m×2 m

3 m×3 m

3 m×4 m

and 4 m×4 m gauze sand barriers were set to intercept wind and sand flow

and the effects increased as grid-spacing became smaller. Sediment load changed with height above the soil surface in an exponential relationship in all three seasons. The amount of sediment transported by the northwest wind was more than the amount transported by the southeast wind. The amount of sediment transported in spring was more than the amount transported in summer and autumn. Compared with the control

the net sediment transport intercepted in the 0-60 cm height range was reduced 85.98% by the 3 m×4 m gauze sand barrier in spring

and the net sediment transport in this height range was reduced 79.56% in summer and autumn.[Conclusion] Sediment transport of the gauze sand barrier was mainly concentrated in the 20 cm height range above the ground surface. As the size of the gauze sand barrier increased

its ability to reduce the amount of sediment transport decreased. Gauze sand barriers can be set to effectively reduce the hazards of wind-sand flows.

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