Spatio-temporal characterization of the amount of C02 released by public discharges in the city of Kisangani (DR Congo)

A study on the spatio-temporal characterization of the amount of CO₂ released by public discharges was carried out in the city of Kisangani, DR Congo. The method of data collection is a system of closed and static respiration chambers that chemically trap and absorb CO₂ fluxes from public discharges with lime soda. The released CO₂ from discharges, from November 2015 to March 2016 was of 14.6 g C/d/m². The month of March had an average CO₂ flux of 24.7 g C/d/m². with high water content (22.7%) and low temperature (27.2 °C). The month of February had a low CO₂ flux of 5.78 g C/d/m² with low water content (11.5 %) and a high soil temperature (31.8 °C) compared to other months. The relationship between CO₂ flux from public discharges and their water content was strong (R=0.77) which significantly affects CO₂ flux. On the other hand, the relationship with temperature is weak (R=0.31) and it doesn’t significantly explain CO₂ flux.

Keywords: Flux of CO₂, soil respiration, public discharges