Caractérisation des paramètres physico-chimiques des eaux littorales du Lac Kivu face à l’explosion démographique

Doudou Mayaka Kintu; Pascal Mwapu Isumbisho; Cush Ngonzo Luwesi; Yves Aseke Lukuke; Richard Sabimana Gasigwa; Rigobert Zola Lunga; Marcel Adoko Bagala; Arnold Bamba Madiumba

doi:10.59228/rcst.026.v5.i1.233

Characterization of the physico-chemical parameters of the coastal waters of Lake Kivu in the face of the demographic explosion in eastern D.R.C

Authors

Doudou Mayaka Kintu Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Pascal Mwapu Isumbisho Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Cush Ngonzo Luwesi Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Yves Aseke Lukuke Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Richard Sabimana Gasigwa Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Rigobert Zola Lunga Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Marcel Adoko Bagala Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author
Arnold Bamba Madiumba Ecole Régionale de l’Eau (ERE) & Centre de Recherche en Ressources en Eau du Bassin du Congo (CRREBaC), BP 117 Université de Kinshasa (UNIKIN), RD Congo Author

DOI:

https://doi.org/10.59228/rcst.026.v5.i1.233

Keywords:

Physico-chemistry, anthropisation, coastal zone, Population explosion, Water quality

Abstract

In sub-Saharan Africa, demographic growth accompanied by rapid urbanisation is at the root of numerous disturbances to aquatic environments. The repercussions of these various disturbances are more strongly felt in the coastal zone than in the pelagic zone. Statistical analysis was carried out on 6 samples and 10 variables (Temp, DO, Cond, pH, Turb, Transp, NH4+, NO2-, PO43- and SiO2) using R software. The results showed that the pH levels recorded exceed the WHO guide value (6.5-8.5) and may pose health risks to humans. The lake water is highly mineralised (electrical conductivity >1000 μS.cm-1), and is an indicator of saline (salty) conditions in the lake water. Ammonium and phosphate were the parameters that showed the greatest inter-station fluctuations, respectively (0.74± 1.13) and (1.26 ± 1.41), while pH (9.34± 0.0647) and electrical conductivity (1165± 6.02) showed almost no fluctuations in our six water sampling sites. This being the case, urgent measures need to be taken to implement integrated and concerted management policies for the lake's littoral zones. This will help to improve water quality and maintain biodiversity, which is concentrated in the lake's riparian zones.

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