This study evaluates the physicochemical quality of groundwater used for irrigating vegetable crops along the Togolese coast. Thirty samples collected from five locations were analyzed using standard analytical methods and classification diagrams (Richards and Wilcox) to characterize the water. The results show that, although the water generally has low salinity and is suitable for irrigation, it contains high concentrations of potassium and nitrates. The Ablogamé site, in particular, exhibits the highest levels of anthropogenic influence.
FAO (2010) Urban and Peri-Urban Horticulture: Responding to the Challenges of Food Security. Food and Agriculture Organization of the United Nations.
FAO (1997) Irrigation Potential in Africa: A Basin Approach. Food and Agriculture Organization of the United Nations.
Ezin, V., Yabi, I. and Ahanchede, A. (2012) Impact of Salinity on the Production of Tomato along the Coastal Areas of Benin Republic. African Journal of Environmental Science and Technology , 6, 214-223. https://doi.org/10.5897/ajest11.369
Gaye, N., Kane, C., Fall, M. and Kane, A. (2024) Vulnerabilities and Resilience in the Face of Climatic, Health, and Economic Shocks in the Saloum Island (Senegal) Environnement , Risques & Santé , 23, 321-329. https://doi.org/10.1684/ers.2024.1828
Bruce, A.K. (2024) Vulnérabilité communautaire dans un environnement de géorisque côtier: Cas du littoral du Togo. Ph.D. Thesis, Université du Québec à Montréal.
Kinsou, E., Amoussa, A.M., Mensah, A.C.G., Kpinkoun, J.K., Komlan, F.A., Ahissou, H., et al. (2021) Effet de la salinité sur la floraison, la fructification et la qualité nutritionnelle des fruits du cultivar local Akikon de tomate (Lycopersicon esculentum Mill.) du Bénin. International Journal of Biological and Chemical Sciences , 15, 737-749. https://doi.org/10.4314/ijbcs.v15i2.27
Kpinkoun, J.K., Zanklan, S.A., Komlan, F.A., Mensah, A.C.G., Montcho, D., Kinsou, E., et al. (2019) Évaluation de la résistance à la salinité au stade jeune plant de quelques cultivars de piment (Capsicum spp.) du Benin. Journal of Applied Biosciences , 133, 13561-13573. https://doi.org/10.4314/jab.v133i1.8
Gildas Yénoukounmè Sounou, E., Baudouin Geoffroy Gouveitcha, M., Atou, R., Loko, B., Koffi Kpinkoun, J. and Bernard Gandonou, C. (2023) Effect of NaCl Salt Stress on Growth, Ions and Organic Solutes Contents in a Local Cultivar Kpinman of African Eggplant ( Solanum macrocarpon L) in the Republic of Benin. International Journal of Plant & Soil Science , 35, 91-102. https://doi.org/10.9734/ijpss/2023/v35i12748
Daoud, B. 2(024) Development of Peri-Urban Lands. Case of the Experimental Farm of the University of Tiaret. Master’s Thesis, University Ibn Khaldoun-Tiaret.
Abbad, M., Snoussi, S.A., Djerdjouri, A., Zouaoui, A., Saou, A. and Hamidi, Y. (2015) Evaluation de la tolerance au stress salin de deux varietes de tomate ( Solanum lycopersicum ) cultivees en zone aride: Approche physiologique. Agrobiologia , 5, 15-20.
FAO AGRIS (2023) Database on Salinity and Agricultural Performance in West Afri-ca. FAO AGRIS Network.
GIP Littoral (2024) Erosion in Togo, Sharing Experiences with Nouvelle-Aquitaine. https://www.giplittoral.fr/actualites/erosion-au-togo-partage-dexperiences-avec-la-nouvelle-aquitaine
Togolese Republic (2020) Project to Improve Agricultural Resilience to Salinity through the Development and Promotion of Technologies Adapted to Vulnerable Producers RESADE Ministry of Agriculture, Village Hydraulics and Rural Development. https://www.ifad.org/en/w/publications/project-brief-improving-agricultural-resilience-to-salinity-through-development-and-promotion-of-pro-poor-technologies-resade-
Biava, A.K., Djidjolé, E.K., Nathalie, J.B., Edjedu, S.K., Essozima, A., Raoufou, R., et al. (2023) Study of Salinity in Market Garden Production on the Togolese Coast. International Journal of Plant & Soil Science , 35, 1354-1366. https://doi.org/10.9734/ijpss/2023/v35i193679
Brémaud, I., Claisse, A., Leulier, D., Thibault, F. and Ulrich, J. (2006) 2006: Food, Health, Quality of the Environment and the Living Environment in Rural Areas. Educagri Editions.
IFAD (2023) Assessment of Climate-Resilient Agriculture in West Africa: Case Studies and Policy Implications. International Fund for Agricultural Development, 453 p.
FAO (2021) Saline Water and Food Systems. Food and Agriculture Organization of the United Nations.
Ern, H. (1979) Die Vegetation Togos. Gliederung, Gefährdung, Erhaltung. Willd enowia , 9, 151-155.
Fiagan, K.A. (2013) L’impact de l’érosion côtière sur la pêche artisanale maritime au Togo. Revue de Géographie Tropicale et d ’ Environnement , 2, 1-13.
Amey, B.K., Kokou, K., Wala, K. and Batawila, K. (2005) Study of the Dynamics of the Sandy Coastline between Aného and Lomé (Togo) Using Satellite Images. Drought , 16, 61-66.
Centre d’expertise en analyse environnementale du Québec (CEAEQ) (2015) Méthode MA. 115—Mesure de la conductivité électrique de l’eau: Méthode électro-métrique. Ministère du Développement durable, de l’Environnement et de la Lutte contre les changements climatiques (MDDELCC).
AFNOR (1997) Qualité de l’eau—Recueil des normes françaises. Volume 1: Terminologie, échantillonnage et expression des résultats. Association Française de Normalisation (AFNOR).
Rodier, J., Legube, B. and Merlet, N. (2009) L’analyse de l’eau—Eaux naturelles, eaux résiduaires, eau de mer. 9th Editon, Dunod.
Richards, L.A. (1931) Capillary Conduction of Liquids through Porous Mediums. Physics , 1, 318-333. https://doi.org/10.1063/1.1745010
Wilcox, L.V. (1955) Classification and Use of Irrigation Waters. U.S. Department of Agriculture Circular No. 969.
Döll, P. (2009) Vulnerability to the Impact of Climate Change on Renewable Groundwater Resources: A Global-Scale Assessment. Environmental Research Letters , 4, Article ID: 035006. https://doi.org/10.1088/1748-9326/4/3/035006
Edmunds, W.M. and Gaye, C.B. (1997) Natural and Anthropogenic Recharge to the Quaternary Aquifers of the Sahel, West Africa. Hydrogeology Journal , 5, 145-159.
Foster, S., Chilton, J., Moench, M., Cardy, F. and Schiffler, M. (2013) Groundwater in Rural Development: Facing the Challenges of Supply and Resource Sustainability. World Bank Publications.
Werner, A.D., Bakker, M., Post, V.E.A., Vandenbohede, A., Lu, C., Ataie-Ashtiani, B., et al. (2013) Seawater Intrusion Processes, Investigation and Management: Recent Advances and Future Challenges. Advances in Water Resources , 51, 3-26. https://doi.org/10.1016/j.advwatres.2012.03.004
Gorse, J. and Ouedraogo, S. (2008) Les impacts de la salinisation des eaux souterraines sur l’agriculture en Afrique de l’Ouest. Revue Tiers Monde , 196, 891-908.
Diop, M., Cissé, I. and Sy, M.M. (2016) Salinisation des eaux souterraines en zones côtières sénégalaises: État des lieux et impacts agricoles. Afrique Science , 12, 125-137.
Oke, T.R. (1982) The Energetic Basis of the Urban Heat Island. Quarterly Journal of the Royal Meteorological Society , 108, 1-24. https://doi.org/10.1002/qj.49710845502
Howard, L. and Griffiths, I. (2007) Urban Heat Islands and Climate Change: Causes, Consequences and Mitigation Strategies. Urban Climate , 3, 1-15.
Foster, S.S.D. and Chilton, P.J. (2003) Groundwater: The Processes and Global Significance of Aquifer Degradation. Philosophical Transactions of the Royal Society of London. Series B : Biological Sciences , 358, 1957-1972. https://doi.org/10.1098/rstb.2003.1380
Taylor, R.G., Scanlon, B., Döll, P., Rodell, M., van Beek, R., Wada, Y., et al. (2012) Ground Water and Climate Change. Nature Climate Change , 3, 322-329. https://doi.org/10.1038/nclimate1744
Neidhardt, H. and Shao, W. (2023) Impact of Climate Change-Induced Warming on Groundwater Temperatures and Quality. Applied Water Science , 13, 235. https://doi.org/10.1007/s13201-023-02039-5
Perry, C., Steduto, P., Allen, R.G. and Burt, C.M. (1997) Increasing the Productivity of Water. Irrigation and Drainage , 56, 193-199.
Ayers, R.S. and Westcot, D.W. (1985) Water Quality for Agriculture (FAO Irrigation and Drainage Paper No. 29). FAO.
Machado, R. and Serralheiro, R. (2017) Soil Salinity: Effect on Vegetable Crop Growth. Management Practices to Prevent and Mitigate Soil Salinization. Horticulturae , 3, Article 30. https://doi.org/10.3390/horticulturae3020030
Ghassemi, F., Jakeman, A.J. and Nix, H.A. (1995) Salinisation of Land and Water Resources: Human Causes, Extent, Management and Case Studies. Center for Resource and Environmental Studies, The Australian National University.
Rahman, A., Tsuchiya, N. and Masunaga, S. (2019) Assessment of Groundwater Salinization and Associated Factors in Urban and Peri-Urban Areas. Environmental Monitoring and Assessment , 191, 271.
Djongon, K.A., Gibert-Brunet, E., Barbecot, F., Horoi, V., Barry, R., Gnazou, M., et al. (2025) Coastal Shallow Groundwater in Togo: Vulnerability Assessment Using the DRASTIC Method with EC Validation. Modeling Earth Systems and Environment , 11, Article No. 166. https://doi.org/10.1007/s40808-025-02346-7
FAO (1985) Guidelines for Interpreting Water Quality for Irrigation. Food and Agriculture Organization of the United Nations.
Najib, H., Chikhaoui, M. and El Hmaidi, A. (2015) Salinisation des eaux sou-terraines dans la région de Chaouia, Maroc. Revue des Sciences de l ’ Eau , 28, 57-68.
Faye, S., Gaye, C. B. and Malou, R. (2019) Caractérisation physico-chimique des eaux souterraines côtières de Dakar (Sénégal). Journal of African Earth Sciences , 154, 40-51.
Boukari, M., Degbey, C. and Boko, M. (2011) Qualité des eaux souterraines dans les zones côtières du Bénin. Revue Béninoise de Géosciences , 1, 15-26.
Gao, S., Zheng, T., Zheng, X. and Luo, J. (2025) Impact of River-Groundwater Interactions on Residual Saltwater Pollution in Estuarine Groundwater Reservoirs. Water Research , 279, Article ID: 123474. https://doi.org/10.1016/j.watres.2025.123474
Hem, J.D. (1985) Study and Interpretation of the Chemical Characteristics of Natural Water (USGS Water Supply Paper 2254). U.S. Geological Survey.
Todd, D.K. and Mays, L.W. (2005) Groundwater Hydrology. 3rd Edition, John Wiley & Sons.
Abdelhafid, R., El Gharous, M. and Karrou, M. (2019) Effets des sels dissous sur la croissance des cultures maraîchères en zones arides. Revue Marocaine des Sciences Agronomiques et Vétérinaires , 7, 87-93.
Müller, K. and Cornel, P. (2017) Water Quality for Irrigation: Impacts and Assessment Methods. Journal of Irrigation Science , 35, 233-245.
Ayers, R.S. and Westcot, D.W. (1994) Water Quality for Agriculture (Update of FAO Paper 29). FAO.
Health Canada (1992) Guidelines for Canadian Drinking Water Quality: Guideline Technical Document on Nitrates and Nitrites. Health Canada.
Levallois, P. and Phaneuf, D. (1994) Nitrate Contamination of Drinking Water: Health Risk Analysis. Canadian Journal of Public Health , 85, 192-196.
Organisation de Coopération et de Développement Économiques (2012) Water Quality and Agriculture: Meeting the Policy Challenge. OECD Publishing.
Organisation de Coopération et de Développement Économiques (2017) Diffuse Pollution, Degraded Waters: Emerging Policy Solutions. OECD Publishing.
Houédakor, K.Z., Adjalo, D.K., Danvide, B., Totin Vodounon, H.S. and Amoussou, E. (2025) Groundwater Characteristics and Quality in the Coastal Zone of Lomé, Togo. Water , 17, Article 1813. https://doi.org/10.3390/w17121813
Agricultural Sciences (2024) Effect of Irrigation Salinity on Potassium Leaching in Sandy Soils. Agricultural Sciences , 15, 23-34. https://www.scirp.org/pdf/as_2024011114051342.pdf
Horizon Documentation IRD (2023) Groundwater Composition in a Semi-Arid Catchment: Fertilizer Inputs and Evapotranspiration Effects. Hydrological Sciences Journal , 68, 1123-1138. https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-09/010079666.pdf
Silveira, C.P., Soares, J.R., Montes, R.M., Savieto, J. and Otto, R. (2025) Blending Potassium Rocks with KCL Fertilizer to Enhance Crop Biomass and Reduce K Leaching in Sandy Soil. Soil Systems , 9, Article 83. https://doi.org/10.3390/soilsystems9030083
Appelo, C.A. and Postma, D. (2005) Geochemistry, Groundwater and Pollution. 2nd Edition, CRC Press.
Aklibou, A., Gbodjo, C. and Akouété, D. (2022) Pollution ionique dans les zones périurbaines du sud-Togo: Cas d’Ablogamé. Revue de Géosciences de l ’ Afrique de l ’ Ouest , 8, 112-123.
Degbey, C., Boukari, M. and Gounou, J. (2021) État physico-chimique des eaux souterraines maraîchères du littoral béninois. Journal Béninois d ’ Hydrologie , 6, 77-88.
Abascal, E., Gómez-Coma, L., Ortiz, I. and Ortiz, A. (2022) Global Diagnosis of Nitrate Pollution in Groundwater and Review of Removal Technologies. Science of the Total Environment , 810, Article ID: 152233. https://doi.org/10.1016/j.scitotenv.2021.152233
Kebede, T., Mekonnen, M. and Girma, A. (2025) Nutrient Dynamics in Irrigated Vegetable Farming under Saline Stress Conditions. Ethiopian Journal of Agricultural Sciences .
Wen, S., Liang, S., Pang, G., Shan, Q., Ye, Y., Zhang, J., et al. (2025) Hydrochemical Characteristics and Evolution Mechanisms of Shallow Groundwater in the Alluvial-Coastal Transition Zone of the Tangshan Plain, China. Water , 17, Article 2810. https://doi.org/10.3390/w17192810
Rhoades, J.D., Kandiah, A. and Mashali, A.M. (1992) The Use of Saline Waters for Crop Production (FAO Irrigation and Drainage Paper No. 48). FAO.
Aziane, N., Khaddari, A., IbenTouhami, M., Zouahri, A., Nassali, H. and Elyoubi, M.S. (2020) Evaluation of Groundwater Suitability for Irrigation in the Coastal Aquifer of Mnasra (Gharb, Morocco) Mediterranean Journal of Chemistry , 10, 197-212. https://doi.org/10.13171/mjc1020200222997nz
Kelley, W.P. (1963) Use of Saline and Alkali Waters for Irrigation. Reinhold Publishing Corporation.
Lewoyehu, M., Fentahun, D. and Addisu, S. (2023) Evaluation of Koga Irrigation Water in Mecha District, Amhara Region, as an Example of Irrigation Water Quality in Northwestern Ethiopia. Applied Water Science , 13, Article No. 196. https://doi.org/10.1007/s13201-023-01997-0
Diaw, M., Mall, I., Sane, S., Madioune, H.D. and Faye, S. (2015) Assessing of the Suitability for Irrigation Water and Their Repercussions on Land Degradation Process in Delta and Lower Senegal River Valley. American Journal of Water Resources , 3, 32-43.