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The Impact of the Groundwater Salinity and Alkalinity on the Quality of Agricultural Soils in the Coastal Chaouia, Morocco
 
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1
Laboratory of Geodynamics and Geomatics, Department of Geology, Faculty of Sciences El Jadida, Chouaib Doukkali University, Avenue Jabrane Khalil Jabrane, 24 000 El Jadida, Morocco
2
Laboratory of Sustainable Agriculture Management, Department of Agricultural and Environmental Engineering, Higher School of Technology Sidi Bennour, Chouaib Doukkali University, Av. des Facultés, 24 123 El Haouzia, El Jadida, Morocco
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Laboratory of Dynamics of Sedimentary Basins and Geological Correlations, Faculty of Sciences Ben M'Sick Casablanca, Hassan II University, Hay Ifriquia Rue Echahid Eloualid Essaghir, 20 000 Casablanca, Morocco
CORRESPONDING AUTHOR
Mariame Kholaiq   

Laboratory of Geodynamics and Geomatics, Department of Geology, Faculty of Sciences El Jadida, Chouaib Doukkali University, Avenue Jabrane Khalil Jabrane, 24 000 El Jadida, Morocco
 
J. Ecol. Eng. 2022; 23(8):309–319
 
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ABSTRACT
The Coastal Chaouia region is located south of the Casablanca city (Morocco). Since the 70s, groundwater has been used intensively for irrigation, previously for growing citrus and currently for vegetables and forages. The increase of irrigated soils by pumping has induced environmental problems such as the degradation of groundwater quality and salt water intrusion. For these reasons, this work aims to study the impact of the irrigation water quality upon the agricultural soils. 71 samples for well water and soil were taken to represent the whole area of our study. With 3 different zones (0-1.8Km, 1.8-4.5Km, 4.5-11Km from the coast). The analyzed parameters are salinity and pH. The results show firstly, that the soil pH average values decrease for the three zones with 7.73, 7.57, and 7.52, respectively. However, the water pH averages vary from 7.24 to 7.49. For the soil electrical conductivity, it represents a light decrease moving from the nearest zone to the sea to the far one (average of 3.54, 2.66, and 2.33, respectively). Similar result is for observed water electrical conductivity with average of 6.83, 5.30, and 2.06, respectively, for the three zones. The analyses of the soil and water salinity show that both salinities decreased moving from the coast to inland. Richard and Wilcox charts have confirmed the strong mineralization and the poor quality of most of the well water which are close to the sea.