An Experimental Study of Dust Emission Process on Cultivated Soils in Ningxia

NAN Ling1; 2; XIAO Fengjun1; DONG Zhibao1; 3

doi:10.13870/j.cnki.stbcxb.2016.05.023

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An Experimental Study of Dust Emission Process on Cultivated Soils in Ningxia

更新时间：2025-03-12

- An Experimental Study of Dust Emission Process on Cultivated Soils in Ningxia
- Vol. 30, Issue 5, Pages: 135-139(2016)
- 作者机构：
  
  1. 陕西师范大学旅游与环境学院,西安,710062
  2. 宁夏大学西部发展研究中心,银川,750021
  3. 中国科学院寒区旱区环境与工程研究所沙漠与沙漠化重点实验室,兰州,730000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2016.05.023
  CLC： P951;S157.1
- Published：2016
- 稿件说明：
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NAN Ling1, 2, XIAO Fengjun1, et al. An Experimental Study of Dust Emission Process on Cultivated Soils in Ningxia[J]. 2016, 30(5): 135-139.
DOI：

NAN Ling1, 2, XIAO Fengjun1, et al. An Experimental Study of Dust Emission Process on Cultivated Soils in Ningxia[J]. 2016, 30(5): 135-139. DOI： 10.13870/j.cnki.stbcxb.2016.05.023.

摘要

为揭示农田土壤风蚀引起的粉尘释放特征，以宁夏4种农田土壤为研究对象，通过室内风洞模拟试验的方式，对试验中粉尘释放进入气流的PM10进行实时监测，以PM10浓度和PM10通量为指标分析了风速对粉尘释放的影响，对比了不同土壤的粉尘释放能力。结果表明：农田土壤风蚀中的粉尘释放具有瞬时性特征；各土样的累积最大PM10通量随风速的变化趋势差异较大，土样PL在风速6～9 m/s时引起的最大PM10通量变化最大，土样TX和YC在风速15～18 m/s时引起最大PM10通量变化最大；各土样的累积平均PM10通量随着风速的变化趋势一致，呈二次函数增大；平均粉尘通量和风蚀量之间呈对数函数关系；在研究所选4种宁夏农田土壤中，粉尘释放能力在风速达到9 m/s后表现出一致且明显的差异，从大到小依次为PL＞TX＞YC＞YN。

Abstract

To reveal the characteristics of dust emission caused by wind erosion of soil in the cultivated land

an indoor simulated wind tunnel experiment was conducted. In this study

we used soils sampled from the different cultivated land in the northern and middle Ningxia Autonomous Region to investigate the effect of wind speed on the dust emission. The PM10 concentration was monitored and then the PM10 flux was calculated basing on the concentration to compare capability of dust emission. The results showed that dust emission in the cultivated land was a instantaneous process which completed as soon as soil exposed to the wind. The trend of accumulated max PM10 flux was complicated since the largest increase of PM10 flux of PL occurred when the wind speed increased from 6 to 9 m/s

while the largest increase of PM10 flux of TX and YC occurs when the wind speed increased from 15 to 18 m/s. The accumulated average PM10 flux of every soil increased with wind speed in a similar trend which are quadratic functions. There was a logarithmic regression between average PM10 flux and amount of wind erosion. The capability to dust emit of four soils listed in the order of PL＞TX＞YC＞YN when the wind speed higher than 9 m/s.

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