Dust emission is a process triggered by wind erosion to deteriorate atmospheric environmental quality. By taking cultivated soils from sandy area and no-sandy area in the ecotone between agriculture and animal husbandry as research object, we monitored concentration of PM10 in the wind-flow emitted from soil surface in wind tunnel simulation experiment. In order to understand the mechanic of PM10 emission during the wind erosion, we analyzed the characteristic and regularity of temporal variation of PM10. The following conclusions have been obtained: wind erosion rate of cultivated soils from no-sandy area is much lower than sandy area while there is a exponential function relationships between wind erosion rate and wind speed; Being mainly aroused by the direct suspension, the average PM10 flux of cultivated soils from no-sandy area linearly increase with increasing wind speed, and maximum PM10 flux of those soils increase in a power function trend with wind speed. Resulted from uplift by combination of direct suspension and saltation, the average PM10 flux of soils from sandy area is much higher than those from no-sandy area while maximum PM10 flux increase is low. For all soil samples, there is a logarithm function relationship between average PM10 flux and wind erosion rate.
Nan Ling
,
Dong Zhibao
,
Xiao Fengjun
. Characteristic of PM10 Emission of Cultivated Soil in Ecotone between Agriculture and Animal Husbandry[J]. Journal of Desert Research, 2017
, 37(6)
: 1079
-1084
.
DOI: 10.7522/j.issn.1000-694X.2016.00104
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