Analysis on Particle Size of Street Dusts in Xianyang City

SHI Xing-min; LIU Wei-qiang

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Analysis on Particle Size of Street Dusts in Xianyang City

- Analysis on Particle Size of Street Dusts in Xianyang City
- Bulletin of Soiland Water Conservation Vol. 28, Issue 5, Pages: 76-79(2009)
- 作者机构：
  
  1. 咸阳师范学院资源环境与城市科学系,陕西,咸阳,712000
  2. 陕西师范大学旅游与环境学院,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
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- Published：2009
- 稿件说明：
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SHI Xing-min, LIU Wei-qiang. Analysis on Particle Size of Street Dusts in Xianyang City[J]. Bulletin of Soiland Water Conservation, 2009, 28(5): 76-79.
DOI：

SHI Xing-min, LIU Wei-qiang. Analysis on Particle Size of Street Dusts in Xianyang City[J]. Bulletin of Soiland Water Conservation, 2009, 28(5): 76-79. DOI：

摘要

对2008年4月咸阳市区采集的街道灰尘样品进行了粒度分析。结果表明

咸阳市街道灰尘粒度呈双峰分布特征

第一众数为35～75μm

第二众数为280～500μm

平均粒径为80μm; 峰态较宽而且比较对称

分选性较好

与黄土和现代尘暴降尘的粒度分布模式相似。街道灰尘样品粒度由北西至南东无明显规律变化。街道灰尘沉积是由于大气环流对远、近不同距离粗细颗粒物的混合搬运的结果

应是风积作用的继续。在适当的大气动力条件下

咸阳市街道灰尘颗粒大约有56.7%可以进入大气悬浮搬运。

Abstract

The analysis of particle size of street dusts in Xianyang City collected in April

2008 indicates a bimodal dist ribution spect rum with the first mode being 35～75μm and the second

280～500μm. The averaged particle size is found to be 80μm. The dist ribution is characterized by wide kurtosis

better symmetry

and better sorting

which is similar to the particle size distribution of loess and modern duststorms. This indicates that street dusts are a mixture of coarse particles derived from local area and fine particles transported over a long distance by aeolian agent. Under the proper aerodynamic conditions

56.7 % of street dust particles can be picked up and transported by suspension.

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Related Institution

Department of Environmental Science,Northwest University

Department of Resources Environment and Urban Science, Xianyang Normal University

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Department of Urban and Resources Science, Northwestern University

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