Environmental quality of the Oued Lârbaa, Morocco: a multivariate approach using physicochemical parameters, indicator bacteria and parasite and floristic monitoring

Nezha Mherzi, Fatima Lamchouri, Abdelouahab Zalaghi and Hamid Toufik

International Journal of Environmental Technology and Management, 2024, vol. 27, issue 1/2, 129-150

Abstract: In this study, a botanical inventory, five physico-chemical parameters, results of bacteriological and parasitological analyses of soil and water during three periods (dry-2017, wet-2018, and dry-2018) on nine stations of Oued Lârbaa, were analysed by principal component analysis and ascending hierarchical classification. The interpretation of results using these tools allowed us to understand that acidity and salinity are stress factors for the survival of bacteria because of negative correlations between them. The analysis also showed negative correlations between bacteria and parasites which means the presence of competition, vegetation is negatively affected by temperature and pollution. Ascending hierarchical classification showed that stations having received the same type of discharges meet in the same group; station S8 which receives the leachates of the uncontrolled landfill is alone in a group indicating the unique polluting character of leachate.

Keywords: principal component analysis; PCA; Oued Lârbaa; water; soil; physicochemical-bacteriological-parasitological parameters; hierarchical ascending classification; HAC; botanical inventory; Morocco. (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:ids:ijetma:v:27:y:2024:i:1/2:p:129-150

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