Differences in the Efficiency of the Vertical Transfer of Windblown Sediment over Different Ploughed Surfaces during Wind Erosion Events

Mohamed Taieb Labiadh, Gilles Bergametti, Jean Louis Rajot, Christel Bouet, Mohsen Ltifi, Saâd Sekrafi and Thierry Henry des Tureaux
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Mohamed Taieb Labiadh: Institut des Régions Arides (IRA), El Fjé, Medenine 4119, Tunisia
Gilles Bergametti: LISA, Université de Paris and Univ Paris Est Creteil, CNRS, F-75013 Paris, France
Jean Louis Rajot: LISA, Université de Paris and Univ Paris Est Creteil, CNRS, F-75013 Paris, France
Christel Bouet: LISA, Université de Paris and Univ Paris Est Creteil, CNRS, F-75013 Paris, France
Mohsen Ltifi: Institut des Régions Arides (IRA), El Fjé, Medenine 4119, Tunisia
Saâd Sekrafi: Institut des Régions Arides (IRA), El Fjé, Medenine 4119, Tunisia
Thierry Henry des Tureaux: Institut d’Ecologie et des Sciences de l’Environnement de Paris, UMR IRD 242, Université Paris Est Créteil–Sorbonne Université–CNRS–INRAE–Université de Paris, F-93143 Bondy, France

Land, 2021, vol. 10, issue 5, 1-18

Abstract: Airborne sediment fluxes were measured in southern Tunisia on two experimental plots tilled with a moldboard and a tiller plough, respectively, during five wind erosion events of different intensities. The sediment fluxes were sampled on both plots using a mast equipped with seven sand traps positioned between ≈10 and 120 cm height. The windblown sediment fluxes in the 0–100 cm layer were about eight times higher on the plot tilled using the tiller plough compared to the plot tilled using the moldboard plough due to different efficiencies in the trapping of the saltating particles in the furrow, depending on the ridges characteristics. On both plots, sediment fluxes of larger particles were depleted in the sediment samplers compared to the proportions measured in the soil from which they were derived. When examining the sediment flux in the 30–100 cm layer, we observed that the efficiency of the vertical transfer was about twice higher on the moldboard plot than on the tiller one. This implies that a higher fraction of the sediment mobilized by wind can be transported over long distances in the case of a surface ploughed with a moldboard. This result could reduce in part the benefit of using the moldboard instead of the tiller plough regarding soil loss by wind erosion.

Keywords: wind erosion; sediment flux; ploughed surfaces; vertical transfer; size distribution (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2021
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