Assessing the PM10 emission potential of sandy, dryland soils in South Africa using the PI-SWERL

Vos, Heleen C.; Fister, Wolfgang; Holdt, Johanna von; Eckardt, Frank D.; Palmer, Anthony R.; Kuhn, Nikolaus J.

doi:10.1016/j.aeolia.2021.100747

Cited by 4 publications

(6 citation statements)

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“…This field was furthermore largely covered by sand deposits that showed signs of wind erosion. Vos et al [36] showed that these sand deposits are depleted in fines. The fallow field was a maize field that had not been planted during the past rainy season, causing the maize stubble from the year before to deteriorate.…”

Section: Study Area and Sitesmentioning

confidence: 99%

“…The question of the factors influencing the dust emissions in this region has been raised previously by Vos et al [36]. Using the Portable In Situ Wind Erosion Laboratory (PI-SWERL), they identified the presence of a crust to be an important factor in minimizing emission.…”

Section: Introductionmentioning

confidence: 99%

“…The number of fallow fields does show a relationship with the rainfall with an R 2 value of 0.15 (Figure 2). However, Vos et al [36] measured a low dust emission flux on these fields as long as the presence of sandy saltators and abrasion are limited, due to the crusted nature and high cohesion of these fields.…”

Section: Introductionmentioning

confidence: 99%

“…The number of fallow fields does show a relationsh with an R 2 value of 0.15 (Figure 2). However, Vos et al [36] measured a flux on these fields as long as the presence of sandy saltators and abrasio to the crusted nature and high cohesion of these fields. The question of the factors influencing the dust emissions in thi raised previously by Vos et al [36].…”

Section: Introductionmentioning

confidence: 99%

“…However, Vos et al [36] measured a flux on these fields as long as the presence of sandy saltators and abrasio to the crusted nature and high cohesion of these fields. The question of the factors influencing the dust emissions in thi raised previously by Vos et al [36]. Using the Portable In Situ Wind E (PI-SWERL), they identified the presence of a crust to be an im minimizing emission.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Crop and Land Management on Wind Erosion from Sandy Soils in Dryland Agriculture

et al. 2022

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Minimizing wind erosion on agricultural fields is of great interest to farmers. There is a general understanding that vegetation can greatly minimize the wind erosion taking place. However, after harvest, a low vegetation cover can be inevitable, whereby the amount of stubble that remains on a field is dependent on the crop type and land management. This study aims at quantifying the vulnerability to wind erosion of different crops, and the possibility to predict the vulnerability based on high precision aerial images. The study area was the semi-arid Free State, which holds large intensive agriculture on sandy soils. These croplands have been identified as the largest emitter of dust in South Africa. The main crop in the region is maize, but also sunflower, peanut and fallow fields are common land-use types. On these fields, the horizontal sediment flux, the saltation threshold, and aerodynamic roughness length were measured, and the soil cover was assessed using Unmanned Aerial Vehicle (UAV) imagery. The results showed a strong relationship between the soil cover and the sediment flux, whereby fallow and groundnut fields have the highest wind erosion risk. These results emphasize the great importance of soil cover management to prevent wind erosion.

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Section: Study Area and Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Crop and Land Management on Wind Erosion from Sandy Soils in Dryland Agriculture

et al. 2022

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Soil Erosion Research and Soil Conservation Policy in South Africa

Baade,

Aucamp,

Collett

et al. 2024

Ecological Studies

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Soil erosion has been identified as an issue in South African farming for more than a century. Erosion of land surfaces by water or wind is a natural process which might be accelerated directly by human impact on land surface properties, e.g., vegetation and soils. An assessment of soil erosion risk indicates average soil loss rates two orders of magnitude larger than long-term soil formation rates. This challenging condition clearly underlines the need for continuous application of established policies and principles as well as emerging modes of conservation agriculture in farming activities in most parts of South Africa. In addition, conservation agriculture has been shown to have positive effects on the cost–value ratio, but diffusion and adoption of this innovative approach still meet resistance often founded in traditional faith and belief systems. However, to cope with challenges from global climate change, e.g., intensified extreme weather conditions (droughts and flooding), strengthened resilience of farming systems is required to i) meet increased domestic and global demand for food and ii) to put into practice sustainable management to diminish on-site and off-site damages from soil erosion on the way to reach sustainable development goals.

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