Natural factors influencing blown sand hazards in Beijing
نویسندگان
چکیده
منابع مشابه
Electrostatics in wind-blown sand.
Wind-blown sand, or "saltation," is an important geological process, and the primary source of atmospheric mineral dust aerosols. Significant discrepancies exist between classical saltation theory and measurements. We show here that these discrepancies can be resolved by the inclusion of sand electrification in a physically based saltation model. Indeed, we find that electric forces enhance the...
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Blown sand is a serious problem in the district facing the Japan Sea where seasonal wind is very strong in winter. In order to prevent the blown sand, the construction technique using natural vegetations had been developed. The growth of the natural vegetations is encouraged by the improvement of sand ingredients in this method. The effects of the method were investigated by the field survey an...
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Incident angle of saltating particles plays a very important role in aeolian events. In this paper, the incident angles of sand particles near the sand bed were measured in wind tunnel. It reveals that the incident angles range widely from 0° to 180° and thereby the means of angles are larger than published data. Surprisingly, it is found the proportion that angles of 5°-15° occupy is far below...
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In Sistan plain, conditions for wind erosion and, consequently, sand spreads are provided. Due to the settlements in the wind erosion centers of this area, the necessity of determining the origin of sands, the analysis of the hazards caused by the displacement of sand dunes and factors creating these hazards are the goals of this study. It is a descriptive-analytical study based on both field a...
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ژورنال
عنوان ژورنال: International Journal of Disaster Risk Science
سال: 2011
ISSN: 2095-0055,2192-6395
DOI: 10.1007/s13753-011-0008-5