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Assessment of the Groundwater Salinity Used for Irrigation and Risks of Soil Degradation in Souss‐Massa, Morocco
Author(s) -
El Oumlouki Kaoutar,
Moussadek Rachid,
Douaik Ahmed,
Iaaich Hamza,
Dakak Houria,
Chati Mohamed Taoufiq,
Ghanimi Ahmed,
El Midaoui Azzedine,
El Amrani Mahacine,
Zouahri Abdelmjid
Publication year - 2018
Publication title -
irrigation and drainage
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 38
eISSN - 1531-0361
pISSN - 1531-0353
DOI - 10.1002/ird.2209
Subject(s) - irrigation , hydrology (agriculture) , groundwater , salinity , environmental science , soil salinity , turbidity , alkalinity , soil water , geology , agronomy , soil science , chemistry , oceanography , geotechnical engineering , organic chemistry , biology
In the Issen irrigated perimeter of the Souss‐Massa Plain, Morocco, under a semi‐arid climate, the use of irrigation is inevitable for most crops. Therefore, groundwater is increasingly being used. Hydrochemical and statistical studies were conducted; they were carried out on the major and secondary elements of water (EC, Ca 2+ , pH, Mg 2+ , Na + , K + , Cl ‐ , SO 4 2‐ , HCO 3 ‐ , CO 3 2‐ , SAR and turbidity). The sampling period lasted over 2 years (2013 and 2014) spread over 3 seasons. The 36 wells that were analysed were spread across the studied plain. The values recorded during the sampling period showed that 11% of the analysed wells are highly saline in which EC > 3 dS m −1 . Chemical analysis revealed a wide variety of chemical composition; samples are divided between two facies: sulphated magnesium calcium bicarbonate and sodium chloride. Then, statistical analyses of the studied parameters showed great variability and the results of analysis allowed maps of salinity and the SAR risk of irrigation water to be drawn. Copyright © 2018 John Wiley & Sons, Ltd.