Characteristics of PM10 emission from farmland during a wind erosion event

doi:10.7522/j.issn.1000-694X.2019.00114

Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (3): 145-150.DOI: 10.7522/j.issn.1000-694X.2019.00114

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Characteristics of PM₁₀ emission from farmland during a wind erosion event

Cen Songbo¹, Zhang Chunlai¹, Dai Yujie¹, Zhang Hui¹, Liu Xinyu¹, Li Qing², Huang Yuhu³

1. State Key Laboratory of Earth Surface Processes and Resource Ecology/MOE Engineering Research Center of Desertification and Blown-sand Control, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;
2. Institute of Geographical Sciences/Engineering and Technology Research Center for Application Information of Hebei Province, Hebei Academy of Sciences, Shijiazhuang 050021, China;
3. National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China

Received:2019-10-31 Revised:2019-12-26 Online:2020-05-20 Published:2020-06-09

Abstract

Abstract: As the starting point of the dust cycle, dust emission caused by wind erosions is one of the hot issues related to global change. Observations of dust emission under natural conditions can provide validations for wind tunnel results and data support, as well as key parameters, for developing prediction models. To reveal the characteristics of dust emission from farmland in the process of soil wind erosion, this study conducted a field observation of PM₁₀ concentration, vertical flux and loss flux in the near surface layer in Bashang regions, Hebei province. Wind speed and sand transport were measured simultaneously. The results show that the effect of dust emission induced by local wind erosion on the dust concentration gradually decreases with increasing height above the ground. Dust concentration at different heights varied in the same trend with that of friction wind speed and sand transport rate in the process of wind erosion. Dust emission has a power function relationship with the friction velocity and a linear relationship with the sand transport rate. The bombardment efficiency of the cultivated soil is on the order of 10^-7 m^-1.

Key words: dust emission, farmland wind erosion, PM₁₀ vertical flux, PM₁₀ loss flux

CLC Number:

Cen Songbo, Zhang Chunlai, Dai Yujie, Zhang Hui, Liu Xinyu, Li Qing, Huang Yuhu. Characteristics of PM₁₀ emission from farmland during a wind erosion event[J]. Journal of Desert Research, 2020, 40(3): 145-150.

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Characteristics of PM₁₀ emission from farmland during a wind erosion event

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