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

in the coldest month (August) is 20°C and 26°C in the hottest month, and the average annual humidity is 79%, ranging from a minimum of 71% to a maximum of 84%. An average of 1095 mm of rain falls per year. The relief of Kinshasa includes:  The Kwango plateau that opens onto the circular marshy plain (Pool Malebo),  The plain of Kinshasa bordering the pool is located between the sides of 300 and 320m, wide of some 5 km,  The region of the hills, belt which prolongs the South of the plain of Kinshasa culminates beyond 50 m of altitude. II. M aterials and M ethods In order to carry out this research, it seemed important to us to first draw up a status report, in particular by consulting the available literature on solid waste management in the city of Kinshasa in the Democratic Republic of Congo in particular and the world in general. Then, in the field, we covered our study area through observations, interviews and surveys with local populations. The physico-chemical parameters were determined from samples taken at different points located at different distances from the center of the dump. The sampling points were chosen so that the sampling was representative of the environment (30 samples). The samples were preserved according to the general guide for the preservation and handling of samples. Hydrogen potential (pH), redox potential (E°), temperature, conductivity, total dissolved solids (TDS) and salinity (SALT) were measured using an EXTECH multi-analyzer, model 433201. For each measurement, the probe was rinsed with distilled water and then dipped into the small bucket containing the sample mixed with distilled water. The different parameters are read and recorded in-situ. All analyses and measurements required to quantify organic, nitrogen and sulfate pollutants are standardized. Statistical data collected in the field and those from the trace metal determination were processed using Microsoft Excel 2016 software. Root growth inhibition was estimated by EC50 (Effective Concentration for which chemical effects are observed for 50% of individuals tested). The EC50 effective concentrations and regression equations are determined from plotting the root length versus percent concentrations of the water samples using the Microsoft Excel 2016 program. Principal Component Analysis (PCA) as well as the correlation matrix were performed by XLSTAT software version 2013.3.02. III. R esults and D iscussion a) Results In the framework of this research, samples and in situ analyses were carried out in the garbage dump located at the intersection of Assossa and Saio avenues in the commune of Kasa-Vubu (Figure 2). This landfill receives household waste from the district of Funa, which includes the communes of Bandalungwa, Bumbu, Kalamu, Kasa-Vubu, Makala, Ngiri-Ngiri and Selembao. It occupies an area of 60 m2, and receives 100 tons of waste/day, composed mostly of organic waste (food scraps, garden waste), followed by plastic and a complex mixture of other types of waste (paper cardboard, glass, some metal scraps, clothes, shoes, etc.). Figure 2: Location of the landfill site at the intersection of Assossa and Saio avenues © 2023 Global Journals Volume XXIII Issue VI Version I 23 ( ) Global Journal of Human Social Science - Year 2023 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