Field wind erosion measurements with Big Spring Number Eight (BSNE) and Modified Wilson and Cook (MWAC) samplers

Méndez, Mariano Javier; Funk, Roger; Buschiazzo, Daniel Eduardo

doi:10.1016/j.geomorph.2011.01.011

Cited by 60 publications

(36 citation statements)

References 17 publications

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“…High efficiencies and field performances of MWAC traps in the previous studies of , , Mendez et al (2011), Poortinga et al (2013) are rather different from the results of this study and results of wind tunnel experiments conducted by Basaran et al (2011). The former group found the MWAC efficiencies quite satisfactory and usually more than 80% while the latter reported that the MWAC efficiencies were not more than 52% for different wind speeds and sediment sizes, and particularly, it was 12% for particles smaller than 100 µm.…”

Section: Resultscontrasting

confidence: 99%

Evaluation of field performance of BEST aeolian sediment catcher in sandy-loam soil of arid zone of Turkey

Başaran¹,

Uzun²,

Erpul³

2017

Soil & Water Res.

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Field measurement of wind erosion is still a great challenge for researchers. In this study, field performance of a newly designed sediment trap BEST (Basaran and Erpul Sediment Trap) was evaluated for the first time and compared with the commonly used Modified Wilson and Cook (MWAC) traps. Experiments were carried out at the Karapinar Research Station of Konya Soil and Water Resources Institute over the 50 × 50 m tilled sandy loam plot. Three wind erosion events occurred during the experiments. A small amount of sediment was trapped by the MWAC traps only at 0.20 m in all three events, and there were not sufficient sediment measurements at the catch heights to obtain vertical mass flux profiles. On the other hand, BEST was able to catch sufficient amount of sediment at each trap height to calculate soil losses from the experimental fields. Besides, an analysis for particle size characteristics by electron microscopy imagery indicated that almost all of the sediment particles trapped by BEST at any height above 0.60 m were smaller than 100 mm. Hereby, during three erosive wind events a better performance of BEST than of MWAC at comparable catch heights was verified.

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Section: Resultscontrasting

confidence: 99%

Evaluation of field performance of BEST aeolian sediment catcher in sandy-loam soil of arid zone of Turkey

Başaran¹,

Uzun²,

Erpul³

2017

Soil & Water Res.

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“…[6]–[8]). Sediment fluxes are often measured using sediment catchers such as the Big Spring Number Eight (BSNE) [9], [10], the Basaran and Erpul Sediment Trap (BEST) [11], [12] or the Modified Wilson and Cooke sediment Catcher (MWAC) [8], [10], [13]. These traps are usually mounted in a vertical array to trap sediment at various heights above the surface.…”

Section: Introductionmentioning

confidence: 99%

Measuring Fast-Temporal Sediment Fluxes with an Analogue Acoustic Sensor: A Wind Tunnel Study

et al. 2013

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In aeolian research, field measurements are important for studying complex wind-driven processes for land management evaluation and model validation. Consequently, there have been many devices developed, tested, and applied to investigate a range of aeolian-based phenomena. However, determining the most effective application and data analysis techniques is widely debated in the literature. Here we investigate the effectiveness of two different sediment traps (the BEST trap and the MWAC catcher) in measuring vertical sediment flux. The study was performed in a wind tunnel with sediment fluxes characterized using saltiphones. Contrary to most studies, we used the analogue output of five saltiphones mounted on top of each other to determine the total kinetic energy, which was then used to calculate aeolian sediment budgets. Absolute sediment losses during the experiments were determined using a balance located beneath the test tray. Test runs were conducted with different sand sizes and at different wind speeds. The efficiency of the two traps did not vary with the wind speed or sediment size but was affected by both the experimental setup (position of the lowest trap above the surface and number of traps in the saltation layer) and the technique used to calculate the sediment flux. Despite this, good agreement was found between sediment losses calculated from the saltiphone and those measured using the balance. The results of this study provide a framework for measuring sediment fluxes at small time resolution (seconds to milliseconds) in the field.

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“…2). The dust sampling bottles are referred to as modified Wilson and Cooke (MWAC) samplers (Mendez et al, 2011;Wilson and Cooke, 1980) and consist of a closed Polyethylene bottle through which the wind can pass via two glass tubes with 8 mm openings. Thus, a big difference between the traps and the MWAC collectors is the much Figure 2.…”

Section: Modified Wilson and Cooke Samplersmentioning

confidence: 99%

Seasonal provenance changes of present-day Saharan dust collected on- and offshore Mauritania

Friese¹,

Hateren²,

Vogt³

et al. 2017

Preprint

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Abstract. Saharan dust has a crucial influence on the earth climate system and its emission, transport and deposition are intimately related to, e.g., wind speed, precipitation, temperature and vegetation cover. The alteration in the physical and chemical properties of Saharan dust due to environmental changes is often used to reconstruct the climate of the past. However, to better interpret possible climate changes the dust source regions need to be known. By analysing the mineralogical composition of transported or deposited dust, potential dust source areas can be inferred. Summer dust transport off northwest Africa occurs in the Saharan air layer (SAL). In continental dust source areas, dust is also transported in the SAL; however, the predominant dust input occurs from nearby dust sources with the low-level trade winds. Hence, the source regions and related mineralogical tracers differ with season and sampling location. To test this, dust collected in traps onshore and in oceanic sediment traps off Mauritania during 2013 to 2015 was analysed. Meteorological data, particle-size distributions, back-trajectory and mineralogical analyses were compared to derive the dust provenance and dispersal. For the onshore dust samples, the source regions varied according to the seasonal changes in trade-wind direction. Gibbsite and dolomite indicated a Western Saharan and local source during summer, while chlorite, serpentine and rutile indicated a source in Mauritania and Mali during winter. In contrast, for the samples that were collected offshore, dust sources varied according to the seasonal change in the dust transporting air layer. In summer, dust was transported in the SAL from Mauritania, Mali and Libya as indicated by ferroglaucophane and zeolite. In winter, dust was transported with the trades from Western Sahara as indicated by, e.g., fluellite.

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Field wind erosion measurements with Big Spring Number Eight (BSNE) and Modified Wilson and Cook (MWAC) samplers

Cited by 60 publications

References 17 publications

Evaluation of field performance of BEST aeolian sediment catcher in sandy-loam soil of arid zone of Turkey

Evaluation of field performance of BEST aeolian sediment catcher in sandy-loam soil of arid zone of Turkey

Measuring Fast-Temporal Sediment Fluxes with an Analogue Acoustic Sensor: A Wind Tunnel Study

Seasonal provenance changes of present-day Saharan dust collected on- and offshore Mauritania

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