Preliminary research on the relationship between soil dust emission ability and soil properties
The soil dust emission ability(SDEA)is a key factor to determine the regional dust emission amount,but there has been a lack of suitable soil property indicators to characterize.In this paper,the relation-ship between SDEA and soil properties is studied by means of field sampling and wind tunnel experiment.The re-sults showed that only the content of silt and sand particles in soils has a significant impact on SDEA among the basic physical and chemical properties of soil related to wind erosion.The SDEA first increases and then decreas-es with the increase of silt and sand content in soils,which supports the viewpoint proposed by relevant scholars that medium texture soil has the strongest dust emission ability.The SDEA is more closely related to the particle size composition of soil dry aggregates,which increases linearly with the increase of the content of fine particles with a diameter of＜0.05 mm in soil erodible particles(C＜005/＜0.85),and decreases significantly with the increase of the content of saltation particles with a diameter of 0.1-0.5 mm in soil erodible particles(C01-0 5/＜085)in a power function law.Among the various indicators of soil physical and chemical properties,only the content of fine par-ticles with diameter of＜0.05 mm in soil dry aggregates(C＜0 05)can reflect the comprehensive impact of various soil basic physical and chemical properties on SDEA,and is significantly linearly correlated with the two posi-tive indicators that affect SDEA,namely the content of soil erodible particles(C＜0.85)and the value of C＜0.05/＜0.85 The C＜005 should be a suitable soil indicator to characterize the SDEA for soil of aggregate development,which is confirmed by the analysis results of soil samples,but further experimental verification is needed.
soil dust emission abilitytotal emission amount of PM10soil physical and chemical propertiessoil erodibilitywind tunnel experiment
NETL
NSTL
万方数据
维普
