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Research Article |

Seasonal Variation of the Physico-Chemical Parameters and Irrigation Suitability of the Waters of the Tsieme River in Brazzaville (Congo)

Water is a basic need for all living beings, it contributes to sustainable development. The management of water resources is a major challenge in the world and for most developing countries. This work proposes to evaluate the physico-chemical quality and the suitability for irrigation of the Tsiémé River in Brazzaville (Congo) during two seasons (dry season 2021 and rainy season 2022). Eight (08) water samples were taken, four times (04) samples per season and then analyzed by physico-chemical methods. The results obtained during the 2021 dry season and the 2022 rainy season revealed temperatures exceeding the WHO standard (25°C), very soft and sometimes turbid waters (8.02-214.00 NTU) with pH values oscillating between 5.61 and 7.73, a low concentration of major and minor ions which confirms the low mineralization of this river. These low levels of major and minor ions show that these waters benefit from the geology of the environment crossed. The dissolved organic carbon and suspended matter contents exceed the WHO guideline values. The projection of water points on Piper's triangular diagram essentially highlights two chemical families: sodium and potassium bicarbonate waters and sodium and potassium chloride waters; the schoeller diagram confirms the facies observed in the Piper diagram. The concentration average of absordable sodium, determined from the SAR, varies from 2.88 to 5.33 meq/L in the dry season and from 0.2 to 2.78 meq/L in the rainy season. These waters belong to class S1 (SAR < 10). The water from the Tsiémé River contains a low amount of sodium and can be used for irrigation in almost any soil without fear of difficulties arising from the alkalinization point of view. Thus, the irrigation indices reveal that the Tsiémé River is of fairly good quality for irrigation.

River Water, Seasonal Variation, Physico-Chemical Parameters, Suitability for Irrigation, Brazzaville, Congo

Tchoumou Martin, Moussoki Nsona Promesse, Louzayadio Mvouezolo Raison Félicien, Engambe Christ Bardoul. (2023). Seasonal Variation of the Physico-Chemical Parameters and Irrigation Suitability of the Waters of the Tsieme River in Brazzaville (Congo). American Journal of Environmental Protection, 12(6), 160-170.

Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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