African Journal of
Environmental Science and Technology

  • Abbreviation: Afr. J. Environ. Sci. Technol.
  • Language: English
  • ISSN: 1996-0786
  • DOI: 10.5897/AJEST
  • Start Year: 2007
  • Published Articles: 1006

Full Length Research Paper

Spatio-temporal characterization of the physico-chemical quality of groundwater: Case of the Lobo watershed (Centre-west of Côte d'Ivoire)

Kamenan Yiwa Monique
  • Kamenan Yiwa Monique
  • Laboratory of Environmental Science and Technology, University of Jean Lorougnon Guedé, Côte d’Ivoire.
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Dibi Brou
  • Dibi Brou
  • Laboratory of Environmental Science and Technology, University of Jean Lorougnon Guedé, Côte d’Ivoire.
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Eblin Sampah Georges
  • Eblin Sampah Georges
  • Laboratory of Environmental Science and Technology, University of Jean Lorougnon Guedé, Côte d’Ivoire.
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Konan Kouakou Seraphin
  • Konan Kouakou Seraphin
  • Laboratory of Environmental Science and Technology, University of Jean Lorougnon Guedé, Côte d’Ivoire.
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Kouassi Kouakou Lazare
  • Kouassi Kouakou Lazare
  • Laboratory of Environmental Science and Technology, University of Jean Lorougnon Guedé, Côte d’Ivoire.
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Plagnes Valerie
  • Plagnes Valerie
  • UMR METIS, Sorbonne University, Paris, France.
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  •  Received: 04 October 2020
  •  Accepted: 27 November 2020
  •  Published: 31 December 2020

Abstract

Drinking water supply to rural communities is increasingly relying on finding groundwater. However, groundwater resources, although believed to be safe and free of pollution, are subjects to local and diffusive pollution. This work aims at assessing the groundwater quality in the Lobo catchment area in Nibéhibé and addressing the mineralization phenomena. To achieve such an objective, a statistical approach was applied to physical-chemical analyses data recorded from two sampling campaigns during the dry and rainy seasons, respectively. The adopted approach consisted first in performing comparative analysis, second in investigating the chemical specificities within the water classes using the piper diagram, and lastly in classifying the water based on their physical-chemical similarities using the Kohonen Self-Organized Map (SOM). The reported results disclose that the investigated groundwater is acidic and weakly mineralized during rainy and dry seasons. The diagram of Piper revealed the waters are mostly chlorinated, sulphated, and calco-magnesian type. The SOM method was used to highlight water pollution especially the acid hydrolysis of rock minerals.

 

Key words: Characterization, spatio-temporal, physico-chemical quality, groundwater, Lobo watershed, Côte d’Ivoire.