Wind erosion is a major environmental problem in the Sahel and other dry regions of the world. It leads to nutrient loss and reduced soil productivity. However, wind transport of nutrients has been poorly studied in the Sahel. The aim of this study is to characterize the seasonal variability of wind transport and determine the associated nutrient losses over an annual cycle. The methodological approach consisted of measuring wind fluxes and determining the levels of physico-chemical parameters in cultivated soils and the fluxes resulting from wind erosion of these same soils. During the monsoon season, between April and September, the fluxes recorded on the millet field represented 97.61% of the annual fluxes, i.e., an average of 7.96 kg？m？1？d？1. Only 2.39% of annual fluxes were recorded during the Harmattan, i.e., an average flux of 0.15 kg？m？1？d？1. The fluxes contained, respectively, 2 and 1.5 times more fine clay-loam fraction and very fine to fine sands than the contents available in the soil. This is in stark contrast to the skeletal sand fraction, whose soil content tends to increase as a result of wind erosion. As far as nutrients are concerned, wind erosion has resulted in the transport of nitrogen, organic carbon, and phosphorus, on average, 10 times more than is available in the soil. Nutrient transport takes place mainly during the monsoon season, particularly at the beginning, which concerns 49%, 82%, and 60%, respectively, of the annual transport of phosphorus, nitrogen, and organic carbon. In order to protect cultivated soils from degradation, it is therefore imperative to minimize wind erosion of soils at the start of the monsoon season.
References
[1]
UNCCD (2024) Recommandations pratiques issues des données sur l’évolution de l’aridité observée aux niveaux mondial et régional et sur les prévisions, au titre de l’objectif 2 du programme de travail de l’Interface science-politique pour l’exercice triennal 2022-2024.
[2]
Tuddenham, M., Mazin, V., Robert, C. and Cozette, L. (2022) 6e rapport d’évaluation du Groupe d’experts intergouvernemental sur l’évolution du climat (Giec). 1er volume: Les sciences physiques du changement climatique-synthèse du résumé à l’intention des décideurs du Giec. https://www.citepa.org/wp-content/uploads/
[3]
OIF, NOTE and NOS (2023). Les perspectives géopolitiques de la croissance démographique dans le Sahel. Note d’analyse, 116, 1-14.
[4]
Ginoux, P., Prospero, J.M., Gill, T.E., Hsu, N.C. and Zhao, M. (2012) Global-Scale Attribution of Anthropogenic and Natural Dust Sources and Their Emission Rates Based on MODIS Deep Blue Aerosol Products. ReviewsofGeophysics, 50, RG3005.
[5]
Guinoiseau, D., Singh, S.P., Galer, S.J.G., Abouchami, W., Bhattacharyya, R., Kandler, K., et al. (2022) Characterization of Saharan and Sahelian Dust Sources Based on Geochemical and Radiogenic Isotope Signatures. QuaternaryScienceReviews, 293, Article 107729. https://doi.org/10.1016/j.quascirev.2022.107729
[6]
Garenne, M. and Ferdi, S.F. (2016) La pression de la population dans les Pays Sahéliens Francophones: Analyse des estimations et projections de population.
[7]
Walther, O. and Pflaum, M. (2021) Resilience and Vulnerabilities in Africa’s Borderlands.
[8]
Vischel, T., Panthou, G., Peyrillé, P., Roehrig, R., Quantin, G., Lebel, T., et al. (2019) Precipitation Extremes in the West African Sahel. In: Tropical Extremes, Elsevier, 95-138. https://doi.org/10.1016/b978-0-12-809248-4.00004-2
[9]
Bennour, A., Jia, L., Menenti, M., Zheng, C., Zeng, Y., Barnieh, B.A., et al. (2023) Assessing Impacts of Climate Variability and Land Use/Land Cover Change on the Water Balance Components in the Sahel Using Earth Observations and Hydrological Modelling. Journal of Hydrology: Regional Studies, 47, Article 101370. https://doi.org/10.1016/j.ejrh.2023.101370
[10]
Cisse, A.B. and Diop, K. (2022) Perception du changement climatique et stratégies d’adaptation paysannes à Louga. Espace Géographique et Société Marocaine. https://revues.imist.ma/index.php/EGSM/article/view/32321
[11]
Gemenne, F., Blocher, J., De Longueville, F., Vigil Diaz Telenti, S., Zickgraf, C., Gharbaoui, D. and Ozer, P. (2017) Changement climatique, catastrophes naturelles et mobilité humaine en Afrique de l’Ouest. Geo-Eco-Trop, 41, 317-337.
[12]
OECD (2022) Environmental Fragility in the Sahel. OECD Development Perspectives, No. 28. OECD Publishing.
[13]
Bogie, N.A., Bayala, R., Diedhiou, I., Dick, R.P. and Ghezzehei, T.A. (2018) Alteration of Soil Physical Properties and Processes after Ten Years of Intercropping with Native Shrubs in the Sahel. Soil and Tillage Research, 182, 153-163. https://doi.org/10.1016/j.still.2018.05.010
[14]
Gardelle, J., Hiernaux, P., Kergoat, L. and Grippa, M. (2010) Less Rain, More Water in Ponds: A Remote Sensing Study of the Dynamics of Surface Waters from 1950 to Present in Pastoral Sahel (Gourma Region, Mali). Hydrology and Earth System Sciences, 14, 309-324. https://doi.org/10.5194/hess-14-309-2010
[15]
Tidjani, A.D., Ozer, A. and Karimoune, S. (2009) Apports de la télédétection dans l’étude de la dynamique environnementale de la région de Tchago (Nord-Ouest de Gouré, Niger). Geo-Eco-Trop, 33, 39-56.
[16]
Yang, Z., Gao, X., Lei, J., Meng, X. and Zhou, N. (2022) Analysis of Spatiotemporal Changes and Driving Factors of Desertification in the Africa Sahel. Catena, 213, Article 106213. https://doi.org/10.1016/j.catena.2022.106213
[17]
Gianoli, F., Weynants, M. and Brink, A. (2025) Land Degradation and the Convergence of Evidence in the Sahel. In: Water and Land in the Sahel, Routledge, 128-140. https://doi.org/10.4324/9781003429111-9
[18]
Maina, O., Souleymane, O.G., Oumarou, S.D., Hamidou, S.D. and Madi, N. (2024) La Contraception de Longue Durée d’Action Réversible: Une Étude Prospective dans une Maternité Universitaire du Niger: Reversible Long-Term Contraception. A Prospective Study in a University Maternity of Niger. Health Sciences and Disease, 25, 22-27.
[19]
Guengant, J.P. and Maga, H.I. (2015) Bilan Des D’activités de Planification Familiale Au Niger Depuis Les Années 1990: Comment Améliorer Et Étendre Certains Résultats Obtenus Ces Dernières Années Par L’Animas-Sutura. IRD/Université Paris I, Panthéon-Sorbonne.
[20]
Brink, A.B. and Eva, H.D. (2009) Monitoring 25 Years of Land Cover Change Dynamics in Africa: A Sample Based Remote Sensing Approach. AppliedGeography, 29, 501-512. https://doi.org/10.1016/j.apgeog.2008.10.004
[21]
van Vliet, M.T.H., Thorslund, J., Strokal, M., Hofstra, N., Flörke, M., Ehalt Macedo, H., et al. (2021) Global River Water Quality under Climate Change and Hydroclimatic Extremes. Nature Reviews Earth & Environment, 4, 687-702. https://doi.org/10.1038/s43017-023-00472-3
[22]
Alessa, L., Kliskey, A. and Brown, G. (2008) Social-Ecological Hotspots Mapping: A Spatial Approach for Identifying Coupled Social-Ecological Space. Landscape and Urban Planning, 85, 27-39. https://doi.org/10.1016/j.landurbplan.2007.09.007
[23]
Ide, I., Abdourhamane Toure, A., Rajot, J.L., Marticorena, B., Noma Adamou, S., Pierre, C., et al. (2025) Wind Erosion Dynamics Associated with Land Use on Sandy Soils under Heavy Anthropogenic Pressure (Southwestern Niger). LandDegradation&Development, 1-14. https://doi.org/10.1002/ldr.70037
[24]
Abdourhamane Touré, A., Tidjani, A.D., Rajot, J.L., Marticorena, B., Bergametti, G., Bouet, C., et al. (2019) Dynamics of Wind Erosion and Impact of Vegetation Cover and Land Use in the Sahel: A Case Study on Sandy Dunes in Southeastern Niger. Catena, 177, 272-285. https://doi.org/10.1016/j.catena.2019.02.011
[25]
Touré, A.A., Tidjani, A.D., Rajot, J., Bouet, C., Garba, Z., Marticorena, B., et al. (2018) Quantification des flux d’érosion éolienne au cours d’une transition champ-jachère au Sahel (Banizoumbou, Niger). Physio-Géo, 12, 125-142. https://doi.org/10.4000/physio-geo.6287
[26]
Abdourhamane Toure, A., Rajot, J.L., Garba, Z., Marticorena, B., Petit, C. and Sebag, D. (2011) Impact of Very Low Crop Residues Cover on Wind Erosion in the Sahel. Catena, 85, 205-214. https://doi.org/10.1016/j.catena.2011.01.002
[27]
Bielders, C.L., Rajot, J.L. and Michels, K. (2004) L’érosion éolienne dans le Sahel nigérien: Influence des pratiques culturales actuelles et méthodes de lutte. Sécheresse, 15, 19-32.
[28]
Chen, P., Shi, W., Liu, Y. and Cao, X. (2022) Slip Rate Deficit Partitioned by Fault-Fold System on the Active Haiyuan Fault Zone, Northeastern Tibetan Plateau. Journal of Structural Geology, 155, Article 104516. https://doi.org/10.1016/j.jsg.2022.104516
[29]
Bationo, A. and Ntare, B.R. (2000) Rotation and Nitrogen Fertilizer Effects on Pearl Millet, Cowpea and Groundnut Yield and Soil Chemical Properties in a Sandy Soil in the Semi-Arid Tropics, West Africa. The Journal of Agricultural Science, 134, 277-284. https://doi.org/10.1017/s0021859699007650
[30]
Sterk, G. and Raats, P.A.C. (1996) Comparison of Models Describing the Vertical Distribution of Wind-Eroded Sediment. Soil Science Society of America Journal, 60, 1914-1919. https://doi.org/10.2136/sssaj1996.03615995006000060042x
[31]
Bielders, C.L., Rajot, J. and Amadou, M. (2002) Transport of Soil and Nutrients by Wind in Bush Fallow Land and Traditionally Managed Cultivated Fields in the Sahel. Geoderma, 109, 19-39. https://doi.org/10.1016/s0016-7061(02)00138-6
[32]
Gomes, L., Rajot, J.L., Alfaro, S.C. and Gaudichet, A. (2003) Validation of a Dust Production Model from Measurements Performed in Semi-Arid Agricultural Areas of Spain and Niger. Catena, 52, 257-271. https://doi.org/10.1016/s0341-8162(03)00017-1
[33]
Visser, M.E. and Both, C. (2005) Shifts in Phenology Due to Global Climate Change: The Need for a Yardstick. Proceedings of the Royal Society B: Biological Sciences, 272, 2561-2569. https://doi.org/10.1098/rspb.2005.3356
[34]
Ravi, S., D’Odorico, P., Breshears, D.D., Field, J.P., et al. (2011) Aeolian Processes and the Biosphere. Reviews of Geophysics, 49, RG3001. https://doi.org/10.1029/2010RG000328
[35]
Mahowald, N.M., Scanza, R., Brahney, J., Goodale, C.L., Hess, P.G., Moore, J.K., et al. (2017) Aerosol Deposition Impacts on Land and Ocean Carbon Cycles. CurrentClimateChangeReports, 3, 16-31. https://doi.org/10.1007/s40641-017-0056-z
[36]
Perumpully, S.J., Gautam, S., J., J.P. and M., S. (2024) Evaluating the Impact of Personal Exposure to Emissions from Sustainable Commercial Heating and Cooking Fuels on Women in Rural Southern India and Their Alignment with Sustainable Development Goals. Water, Air, & Soil Pollution, 235, Article No. 54. https://doi.org/10.1007/s11270-023-06854-z
[37]
Cook, A.J., Fox, A.J., Vaughan, D.G. and Ferrigno, J.G. (2005) Retreating Glacier Fronts on the Antarctic Peninsula over the Past Half-Century. Science, 308, 541-544. https://doi.org/10.1126/science.1104235
[38]
Duniway, M.C., Pfennigwerth, A.A., Fick, S.E., Nauman, T.W., Belnap, J. and Barger, N.N. (2019) Wind Erosion and Dust from us Drylands: A Review of Causes, Consequences, and Solutions in a Changing World. Ecosphere, 10, e02650. https://doi.org/10.1002/ecs2.2650
[39]
Ide, I., Touré, A.A., Noma, H., Louis, R.J., Hassane, B., Didier, T.A. and Garba, Z. (2022) Vegetation Dynamics in a Fragile Ecosystem in Relation to Land Use: The Case of the Dune Cordon of Namaro, Southwestern Niger. African Journal of Environmental Science and Technology, 16, 264-274.
[40]
Touré, A.A., Rajot, J.L., Garba, Z., Guillon, R., Didier, T.A., Marticorena, B., Petit, C. and Sebag, D. (2013) Six années de suivi du flux d’érosion éolienne sur un sol sableux cultivé au Sahel: Impacts des résidus de culture et de l’encroûtement. Etude et Gestion des Sols, 20, 55-68.
[41]
Touré, A.A., Didier, T.A. and Rajot, J. (2017) Impacts de la variabilité spatiale de l’occupation des sols sur l’érosion éolienne et les transports de nutriments dans le terroir de Banizoumbou (Sud-Ouest du Niger). Algerian Journal of Arid Environment, 7, 52-62.
[42]
Rajot, J. (2001) Wind Blown Sediment Mass Budget of Sahelian Village Land Units in Niger. BulletindelaSociétéGéologiquedeFrance, 172, 523-531. https://doi.org/10.2113/172.5.523
[43]
Malam Assane, M. (2019) Caractérisation du potentiel de revégétalisation spontané des sols en milieu dunaire et proposition de techniques alternatives de fixation des dunes dans le sudest du Niger. Thèse de doctorat de l’université de Niamey.
[44]
Tidjani, A.D. (2008) Erosion éolienne dans le Damagaram Est (Sud-Est du Niger): Paramétrisation, quantification et moyens de lutte. Thèse de doctorat, Université catholique de Louvain.
[45]
Fryrear, D.W. (1986) A Field Dust Sampler. JournalofSoilandWaterConservation, 41, 117-120. https://doi.org/10.1080/00224561.1986.12455946
[46]
Tidjani, A.D., Touré, A., Rajot, J.L., Marticorena, B., Bielders, C.L. and Bouet, C. (2016) Flux éolien et dynamique des fronts dunaires dans le Manga (Sud-Est du Niger). Revue Ivoirienne des Sciences et Technologie, 28, 323-332.
[47]
Labiadh, L., Oturan, M.A., Panizza, M., Hamadi, N.B. and Ammar, S. (2015) Complete Removal of AHPS Synthetic Dye from Water Using New Electro-Fenton Oxidation Catalyzed by Natural Pyrite as Heterogeneous Catalyst. Journal of Hazardous Materials, 297, 34-41. https://doi.org/10.1016/j.jhazmat.2015.04.062
[48]
Zhou, Z., Liu, X., Sun, K., Lin, C., Ma, J., He, M., et al. (2019) Persulfate-Based Advanced Oxidation Processes (AOPs) for Organic-Contaminated Soil Remediation: A Review. Chemical Engineering Journal, 372, 836-851. https://doi.org/10.1016/j.cej.2019.04.213
[49]
Stout, J.E. and Zobeck, T.M. (1996) The Wolfforth Field Experiment: A Wind Erosion Study. Soil Science, 161, 616-632. https://doi.org/10.1097/00010694-199609000-00006
[50]
Sterk, G. and Raats, P.A.C. (1996) Comparison of Models Describing the Vertical Distribution of Wind‐Eroded Sediment. SoilScienceSocietyofAmericaJournal, 60, 1914-1919. https://doi.org/10.2136/sssaj1996.03615995006000060042x
[51]
Edahbi, M., Khaddor, M. and Salmoun, F. (2014) Caractérisation des sols du Nord du Maroc (Bassin Loukkos) (Characterization of the soils in North Morocco (Loukkos Area)). Journal of Materials and Environmental Science, 5, 2133-2138.
[52]
Zoghlami, R.I., Hamdi, H., Mokni-Tlili, S., Khelil, M.N., Ben Aissa, N. and Jedidi, N. (2016) Changes in Light-Textured Soil Parameters Following Two Successive Annual Amendments with Urban Sewage Sludge. Ecological Engineering, 95, 604-611. https://doi.org/10.1016/j.ecoleng.2016.06.103
[53]
Ouédraogo, I., Nacoulma, B.M.I., Ouédraogo, O., Hahn, K. and Thiombiano, A. (2014) Productivité et valeur économique des calices de Bombax costatum Pellegr. & Vuillet en zone soudanienne du Burkina Faso. Bois & Forets des Tropiques, 319, 31-41. https://doi.org/10.19182/bft2014.319.a20550
[54]
Guessoum, C. and Boudeffeur, I. (2023) Impact de l’intensification agricole sur les propriétés des sols dans la région de Ghardaïa: Cas d’El Guerrera.
[55]
Rajot, J.L., Karambiri, H., Ribolzi, O., Planchon, O. and Thiebaux, J. P. (2009) Interaction entre érosions hydrique et éolienne sur sols sableux pâturés au Sahel: Cas du bassin-versant de Katchari au nord du Burkina Faso. Science et changementsplanétaires/Sécheresse, 20, 17-30.
[56]
Liu, X., Du, H., Li, S., Wang, T. and Fan, Y. (2022) Effects of Different Cropland Reclamation Periods on Soil Particle Size and Nutrients from the Perspective of Wind Erosion in the Mu Us Sandy Land. FrontiersinEnvironmentalScience, 10, Article 861273. https://doi.org/10.3389/fenvs.2022.861273
[57]
Visser, S.M. and Sterk, G. (2007) Nutrient Dynamics—Wind and Water Erosion at the Village Scale in the Sahel. Land Degradation & Development, 18, 578-588.
[58]
Sterk, G. and Stein, A. (1997) Mapping Wind‐Blown Mass Transport by Modeling Variability in Space and Time. SoilScienceSocietyofAmericaJournal, 61, 232-239. https://doi.org/10.2136/sssaj1997.03615995006100010032x
