Global Journal of Human-Social Science, B: Geography, Environmental Science and Disaster Management, Volume 23 Issue 6

TDS: The spatial variation of TDS values shows the same pattern as that of conductivity with a minimum of 1.68g/L obtained at the mouth and a maximum of 1314g/L obtained in the middle of the discharge. Figure 7: Salinity values at each measurement point Salinity: Like the conductivity and TDS graphs, the salinity graph also shows the same pattern with a minimum of 3.9 mg/L obtained at the mouth and a maximum of 9.2 mg/L obtained in the middle. Figure 8: Values of redox potential at each measurement point Redox potential: The values of redox potential are lower than -14mV and vary very little with a minimum of - 32.5mV obtained at the mouth and a maximum of - 29mV obtained on the site. We can underline that the lagoon presents globally the characters of a reducing environment. Table 2: Pearson's correlation matrix Column 1 Conductivity TDS SALT PH ORP TPE Conductivity 1 TDS 0,9855775 1 SALT 0,9909624 0,986156 1 PH -0,0070378 0,039592 -0,01692 1 ORP -0,0187411 -0,05676 -0,01234 -0,98774 1 TPE 0,15066765 0,137845 0,15494 0,038689 -0,06101 1 Source: Field survey, 2021 The Pearson correlation matrix in the table shows the values of the coefficients of determination R² for a rejection threshold of 5%. The analysis of this table shows a strong positive correlation between salinity, conductivity and TDS. This implies that these three parameters evolve in a proportional way. The redox potential and temperature, on the other hand, show a negative correlation with the other parameters. This states that these two parameters are inversely proportional to the mineralization parameters. That is, Volume XXIII Issue VI Version I 26 ( ) Global Journal of Human Social Science - Year 2023 © 2023 Global Journals B Analysis of the Household Waste Management System and the Health and Environmental Impact in the Municipality of Kasa Vubu, City of Kinshasa in the Democratic Republic of Congo