International Journal of
Water Resources and Environmental Engineering

  • Abbreviation: Int. J. Water Res. Environ. Eng.
  • Language: English
  • ISSN: 2141-6613
  • DOI: 10.5897/IJWREE
  • Start Year: 2009
  • Published Articles: 281

Full Length Research Paper

Contribution to knowledge of the Lakes of Ounianga by bathymetry and physicochemistry

Arrakhais Abakar Bourma
  • Arrakhais Abakar Bourma
  • Department of Earth Sciences, Faculty of Sciences, University of Douala, P. O. Box 14157, Douala, Cameroon.
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Abderamane Hamit
  • Abderamane Hamit
  • Department of Geology, Faculty of Exact and Applied Sciences, University of N’djamena, P. O. Box 1027, N’djamena, Chad.
  • Google Scholar
Moussa Abderamane
  • Moussa Abderamane
  • Department of Geology, Faculty of Exact and Applied Sciences, University of N’djamena, P. O. Box 1027, N’djamena, Chad.
  • Google Scholar
Beatrice Ketchemen-Tandia
  • Beatrice Ketchemen-Tandia
  • Department of Earth Sciences, Faculty of Sciences, University of Douala, P. O. Box 14157, Douala, Cameroon.
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Mahamat NourAbdalah
  • Mahamat NourAbdalah
  • Department of Geology, Faculty of Exact and Applied Sciences, University of N’djamena, P. O. Box 1027, N’djamena, Chad.
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  •  Received: 15 June 2017
  •  Accepted: 22 August 2017
  •  Published: 31 October 2017

Abstract

This work aimed to contribute to knowledge improvement of the great Lake ecosystems of Chad, precisely that of the Lakes of Ounianga using bathymetric statements on water levels and the in situ analysis of physicochemical parameters of the lake’s waters. Bathymetric surveys facilitated characterization of the morphology of the bottom of the lakes with depths that vary from 0 to -27 m and 0 to -5.7 m for Yoan and Teli Lakes, respectively. With regards to water physio-chemistry, the temperature of the Teli Lake water measuring up to 0.5 m varied from 20.8 to 36°C, while that of Lake Yoan varied from 10.50 to 32.90°C, with an average of 22 and 27°C. The conductivity values oscillated between 69 and 111,700 μS/cm for the Lake Teli and 100 to 64,000 μS/cm for the Lake Yoan. This document illustrates the techniques used in the investigation of a lake whose study constitutes a wide field of continental hydrology.

 

Key words: Ecosystem, lakes, bathymetry, physio-chemistry, Ounianga, Chad.