African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6693

Full Length Research Paper

Analysis of seasonal change effects on the major elements’ concentrations and water level of South Lake Cyohoha, Rwanda

Jean de Dieu Bazimenyera1,2*,  Fu Qiang1 and Théophila Niragire3
1NorthEast Agricultural University, School of Water Conservancy and Civil Engineering, No.59, Mucai Street, Xiangfang District, Harbin 150030, P. R. China. 2Department of Rural Development, Kigali Independent University (ULK), Gisenyi Campus, Rubavu, P. O. Box 248 Gisenyi, Rwanda. 3Department of Management, Independent Institute of Lay Adventists of Kigali, Kigali, Rwanda.
Email: [email protected]

  •  Published: 08 August 2013


This paper analyzed the effects of seasonal change on the quality and quantity of South Lake Cyohoha water, using primary data obtained from the analysis of water samples taken monthly at three different locations during the period 2009 – 2010. The spectroscopic technique was used to determine the concentration of the following major elements: Cr, Mn, Al, N, P, As, Ba, Ca, Cu, Fe, Mg, and K. The results showed that except calcium, iron and magnesium the concentrations of the remaining elements were high during  the raining seasons and low during the dry seasons. The analysis of the change of water level in the Lake South Cyohoha during the same period revealed that water level increases proportionally with the increasing rainfall with correlation coefficient of 0.583 and decreases as temperature increases with the correlation coefficient of 0.708. Conductivity and pH also confirmed the seasonal change effects as conductivity was high during the raining seasons and low during the dry seasons while pH was high during the dry seasons and low during the raining seasons.


Key words: Seasonal change effects, major elements’ concentrations, water level, South Lake Cyohoha.