Evaluating groundwater quality and salinity dynamics in the Western-west area of El Minya Governorate, Egypt, based on geochemical modelling and multivariate analysis

Author:

Asmoay AhmedORCID

Abstract

AbstractIn the Western-west area of El Minya Governorate, Egypt, the present study investigates the water quality and salinity of 33 groundwater samples. The primary aim is to conduct a comprehensive evaluation of water purity and gain insights into salinity dynamics. The investigation involves a combination of geochemical analysis and multivariate statistics to reveal significant findings that contribute to our understanding of groundwater characteristics in the region. The collected groundwater samples are analyzed to assess various properties, including pH levels, mineral content, hardness, and salinity. The prevalence of sodium (Na) and chloride (Cl) ions emerges as a noteworthy aspect, implying their derivation from deeper aquifers through mechanisms like upward seepage or reverse ion exchange. The observation is validated through Durov's plot analysis. Concerning the suitability of the water for consumption, the study raises concerns. Apart from magnesium (Mg) ions, all other parameters exceed the acceptable drinking water limits defined by the World Health Organization (WHO), indicating potential health implications related to water quality in the region. Furthermore, outcomes from the saturation index reveal an oversaturation of groundwater with evaporites and carbonates, with halite and sylvite minerals standing as exceptions to this trend. Negative chloroalkaline ratios offer insights into the origins of excessive Na and Cl ions in 72% of the samples, pointing towards processes such as rainy recharging and reverse ion exchange as contributors. Gibbs' chart analysis highlights evaporite dissolution as the predominant process influencing water composition. The study also utilizes principal component analysis, identifying the dissolution of halite as the primary source of Na, K, Cl, and SO4 ions, while the presence of calcium (Ca) and bicarbonate (HCO3) ions originates from the dissolution of carbonate minerals, thereby influencing water hardness and salinity levels. Considering the findings, we recommend the dilution of groundwater with fresh water, assuming the absence of additional contaminants. This step is essential for enhancing water safety for drinking purposes. This research not only advances our understanding of water quality and salinity dynamics in the region but also underscores the imperative for implementing sustainable water resource management strategies. Furthermore, we propose that future investigations delve into the broader environmental ramifications of these discoveries, thus contributing to a more holistic comprehension of the complexities associated with groundwater quality and salinity.

Publisher

Springer Science and Business Media LLC

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