Threshold wind velocity as an index of soil susceptibility to wind erosion under variable climatic conditions

Oro, Laura Andrea de; Buschiazzo, Daniel Eduardo

doi:10.1002/ldr.863

Cited by 40 publications

(11 citation statements)

References 16 publications

(27 reference statements)

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“…Compared with previous results (Stout, 2003;de Oro and Buschiazzo, 2009), the saltation activity is higher and the surface is more erodible with lower wind speeds at Tazhong. Our analyses show that the poor precipitation (the precipitation of the whole observation period is only 21.1 mm), the lack of vegetation (the ground surface consists of shifting sand) and the composition of ground surface sands (mainly fine sand and very fine sand) provide the advantageous conditions for wind erosion.…”

Section: Discussioncontrasting

confidence: 95%

“…The piezoelectric saltation sensor (Sensit) is an electronic device based on a sensible diode which can count impacts of saltation sand particles. This device has been used to monitor the saltation movement in many field experi-ments (Fryrear, 1995;Gillette, 1997;Stout and Zobeck, 1997;Stout, 2003Stout, , 2007Stout, , 2010de Oro and Buschiazzo, 2009). In this paper, the characteristics of sand saltation activity and its relation with meteorological elements were analyzed based on the measured data, so as to gain new understanding of saltation activity and dust emissions and try to forecast and guard against the occurrence of windblown sand or sandstorms in the Taklimakan Desert.…”

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confidence: 99%

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Observation of saltation activity at Tazhong area in Taklimakan Desert, China

Yang

Mamtimin

et al. 2012

J. Arid Land

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A two-year field observation of saltation activity was carried out at Tazhong area, the hinterland area of the Taklimakan Desert with highly frequent dust storms. From 1 September 2008 to 31 August 2010, a piezoelectric saltation sensor (Sensit) was used to continuously collect the data on saltation activity at a level sand surface. Analysis on the data suggests that saltation activity can occur at any time of the year when conditions are favorable; however, the necessary conditions are rarely satisfied in most time. In the daytime of spring or summer, saltation activity can persist even over a continuous one-hour-or-so period. It is found that, from 1 September 2008 to 31 August 2010, saltation activity accounts for more than 3% of the total yearly time, and it tends to peak in spring and summer months with strong winds. During winter months when winds are weak, however, it is often at a minimum. It seems that precipitation does not appear to be significant in reducing saltation activity in arid regions like Tazhong.

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Section: Discussioncontrasting

confidence: 95%

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confidence: 99%

Observation of saltation activity at Tazhong area in Taklimakan Desert, China

Yang

Mamtimin

et al. 2012

J. Arid Land

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“…The duration of the storm ( DS ) was calculated using the following equation:

italicDS = \sum_{i}^{n} {WE}_{\geq italicTV},

where DS is the duration of the storm in min, i is the time during which the samplers were installed (in min), n is the time during which the samplers were removed (in min), WE is the average wind speed every 5 min, and TV is the threshold speed (m s −1 ). Erosive velocities were considered for those greater than 6.7 m s −1 at 2 m, which is the threshold wind speed for the soils of central Argentina (De Oro & Buschiazzo, ).…”

Section: Methodsmentioning

confidence: 99%

Glyphosate and AMPA concentrations in wind‐blown material under field conditions

et al. 2018

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Agricultural intensification in fragile arid and semiarid environments has led to an increase in soil degradation, mainly through wind erosion. Argentina is an agricultural and cattle‐farming country, which has increased its productivity in the last few decades, widening the boundaries of farm land and the use of herbicides to control weeds. Glyphosate, which accounts for 65% of the Argentinian pesticides market, is strongly retained in soil. The World Health Organization concluded that there was evidence to classify glyphosate as ‘probably carcinogenic to humans.’ In this context, the objective of this study was to determine the presence and concentration of glyphosate and aminomethylphosphonic acid (AMPA) in wind‐blown material in 3 areas in Argentine semiarid regions (Chaco, La Pampa, and San Luis). In 1‐ha2 plots, left uncovered and levelled, the wind‐blown material was collected at heights of 13.5, 50, and 150 cm during 18 erosion events. The wind‐blown material carried by the wind at a height of 150 cm had concentrations of 247 and 218 μg kg−1 of glyphosate and AMPA, respectively. This material was enriched 60 times in glyphosate and 3 times in AMPA as compared with the original soil. This shows that the eroded material can, potentially, have a negative impact on the ecosystem and also on human health, depending on the proportion of this material released into the atmosphere in suspension as particulate matter. This study is, to our knowledge, the first to report concentrations of glyphosate and AMPA in wind‐blown material under field conditions.

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“…Due to the preponderance of the prevailing wind erosion direction, the fetch effect was considered relatively constant. Minimum mean threshold wind speed at 2 m high for this experimental plot is 4·9 m/s (de Oro and Buschiazzo, 2008). Only events with mean wind speeds equal to or greater than 4·9 m/s were considered.…”

Section: Methodsmentioning

confidence: 99%

Comparison of different mass transport calculation methods for wind erosion quantification purposes

Panebianco

Buschiazzo

Zobeck

2010

Earth Surf Processes Landf

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Quantitative estimation of the material transported by the wind under fi eld conditions is essential for the study and control of wind erosion. A critical step of this calculation is the integration of the curve that relates the variation of the amount of the material carried by the wind with height. Several mathematical procedures have been proposed for this calculation, but results are scarce and controversial. One objective of this study was to assess the effi ciency of three mathematical models (a rational, an exponential, and a simplifi ed Gaussian function) for the calculation of the mass transport, as compared to the linear spline interpolation. Another objective of this study was to compare the mass transport calculated from fi eld measurements obtained from a minimum of three discrete sampling heights with measurements of nine sampling heights. With this purpose, wind erosion was measured under low surface roughness conditions on an Entic Haplustoll during 25 events. The rational function was found to be mathematically limited for the estimation of wind eroded sediment mass fl ux. The simplifi ed Gaussian model did not fi t to the vertical mass fl ux profi le data. Linear spline interpolation generally produced higher mass transport estimates than the exponential equation, and it proved to be a very fl exible and robust method. Using different sampling arrangements and different mass fl ux models can produce differences of more than 45% in mass transport estimates, even under similar fi eld conditions. Under the conditions of this study, at least three points between the soil surface and 1·5 m high, including one point as closest as possible to the surface, should be sampled in order to obtain accurate mass transport estimates. Additionally, the linear spline interpolation and the non-linear regression using an exponential model, proved to be mathematically reliable methods for calculating the mass transport.

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Threshold wind velocity as an index of soil susceptibility to wind erosion under variable climatic conditions

Cited by 40 publications

References 16 publications

Observation of saltation activity at Tazhong area in Taklimakan Desert, China

Observation of saltation activity at Tazhong area in Taklimakan Desert, China

Glyphosate and AMPA concentrations in wind‐blown material under field conditions

Comparison of different mass transport calculation methods for wind erosion quantification purposes

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