Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.aeolia.2021.100747 |
Assessing the PM10 emission potential of sandy, dryland soils in South Africa using the PI-SWERL | |
Vos, Heleen C.; Fister, Wolfgang; Holdt, Johanna R. von; Eckardt, Frank D.; Palmer, Anthony R.; Kuhn, Nikolaus J. | |
通讯作者 | Vos, HC (corresponding author), Univ Basel, Phys Geog & Environm Change Res Grp, Basel, Switzerland. |
来源期刊 | AEOLIAN RESEARCH
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ISSN | 1875-9637 |
EISSN | 2212-1684 |
出版年 | 2021 |
卷号 | 53 |
英文摘要 | The Free State has been identified as the region with the most dust sources in South Africa. These dust sources can be linked with the large, heavily cultivated cropland areas in this province, which leaves fields vulnerable to wind erosion after the harvest in the winter. For this study, the focus was on the factors that influence the emission from bare, flat surfaces on agricultural lands in this region. The Portable In-Situ Wind Erosion Laboratory (PI-SWERL) was used to measure the emission flux from adjacent crusted and loose surfaces, which was combined with shear strength, moisture, and soil texture measurements. Boosted regression tree (BRT) analyses were used to identify the variable with the highest relevance on the emission flux. On the whole dataset, that the shear strength is the most important variable that controls the emission. This is reflected in the significantly lower emission from the crusted surfaces (0.49 mg m- 2 s- 1) compared to that of loose surfaces (2.34 mg m- 2 s- 1). However, for crusted surfaces, the presence of abraders appeared to be the most significant factor in emission, showing a power relationship between the abrader count and the emission flux (R2 = 0.76). In the case of the loose surfaces, the presence of clay and silt was a major influence in emissivity, with a linear relationship between the two variables (R2 = 0.68). This difference in factors depending on the agricultural disturbance, asks for a more holistic approach when predicting emission from such arid cropland areas. |
英文关键词 | PI-SWERL Dust emission Croplands South Africa Soil crust |
类型 | Article |
语种 | 英语 |
开放获取类型 | hybrid |
收录类别 | SCI-E |
WOS记录号 | WOS:000702573100004 |
WOS关键词 | FUGITIVE DUST SOURCES ; WIND EROSION ; AEOLIAN DUST ; MOJAVE DESERT ; HUMAN HEALTH ; TRANSPORT ; TUNNEL ; DYNAMICS ; SEDIMENT ; MODEL |
WOS类目 | Geography, Physical |
WOS研究方向 | Physical Geography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/362339 |
作者单位 | [Vos, Heleen C.; Fister, Wolfgang; Kuhn, Nikolaus J.] Univ Basel, Phys Geog & Environm Change Res Grp, Basel, Switzerland; [Holdt, Johanna R. von; Eckardt, Frank D.] Univ Cape Town, Dept Environm & Geog Sci, Cape Town, South Africa; [Palmer, Anthony R.] Rhodes Univ, Inst Water Res, Grahamstown, South Africa |
推荐引用方式 GB/T 7714 | Vos, Heleen C.,Fister, Wolfgang,Holdt, Johanna R. von,et al. Assessing the PM10 emission potential of sandy, dryland soils in South Africa using the PI-SWERL[J],2021,53. |
APA | Vos, Heleen C.,Fister, Wolfgang,Holdt, Johanna R. von,Eckardt, Frank D.,Palmer, Anthony R.,&Kuhn, Nikolaus J..(2021).Assessing the PM10 emission potential of sandy, dryland soils in South Africa using the PI-SWERL.AEOLIAN RESEARCH,53. |
MLA | Vos, Heleen C.,et al."Assessing the PM10 emission potential of sandy, dryland soils in South Africa using the PI-SWERL".AEOLIAN RESEARCH 53(2021). |
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