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The Research of Dust Emission in Arid and Semi-arid Soil

Author: GuYanDan
Tutor: HuangNing
School: Lanzhou University
Course: Engineering Mechanics
Keywords: Wind speed of field observation the grain-size distributions of surface soil micro aggregate Soil moisture the great particle size soil block dust emission
CLC: S157
Type: Master's thesis
Year: 2009
Downloads: 66
Quote: 0
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Abstract


According to the Wind speed of field observation during the three sandstorms in Gansu Province Minchin area, through deal with and analysis the wind speed of field observations, Calculated the surface roughness and wind friction during three sandstorms. Took the surface soil micro aggregate samples in Gansu Province Minchin area, and has carried on the analysis to the grain-size distributions of surface soil micro aggregate through the dry sieve analysis. The grain-size distributions of surface soil in Gansu Province Minchin area are fitting, the expression will be 2 to 3 Lognormal distribution groups’ combination.Based on above measured data and in processing result, using Dust Production Model Simulated the saltation flux, dust emission flux and dust emission rate during the three sandstorms in Gansu Province Minchin area. Studied the influence of the grain-size distributions of surface soil in Gansu Province Minchin area to saltation flux, dust emission flux and dust emission rate. Take the Minchin area as the example, simulated Arid, semiarid area soil dust emission flux. Studied the influence of the grain-size distributions of surface soil, soil moisture, the great particle size soil block and comprehensive surface condition to soil dust emission.

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CLC: > Agricultural Sciences > Agriculture as the foundation of science > Soil > Soil and Water Conservation
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