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February 2023

Incidence of Spatio-Temporal Impact of Runoff in the Spontaneous Subdivision of the Kindele District Located in the Watershed Funa in Kinshasa

1Lopanza Mpia Yoleke Joseph, 2Attrayant Muse Dorsay, 3 Yadoli kosanga Carine
1PhD Student, University of Carthage, National Agronomic Institute of Tunisia, Tunisia
2Assistant, National Institute of Building and Public Works (DR Congo)
3Researcher The Geographical Institute of Congo (DR congos)
DOI : https://doi.org/10.58806/ijirme.2023.v2i2n03

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Abstract

The organization of space and its occupation requires preliminary studies including spatial analysis and physical arrangements The objective of this study is to highlight the characteristics of the watershed which are the detonator of the erosions in the Kindele district in the commune of Mount Ngafula in Kinshasa. To do this, IKONOS satellite and Google Earth images covering the study area from 2001 and 2015 were used to monitor and map the different areas using ArcGIS.10 software. The runoff coefficient calculations to highlight the water flow rates likely to cause water erosion considering a normal rain of 25mm for 30mn were carried out on Excel. The results obtained after the analyzes reveal that the 2001 situation has a runoff coefficient of 0.12 and a runoff rate of 14m3/S, while that of 2015 has a runoff coefficient of 7.18 and a runoff rate of 1222m3/S. The difference in flow is 1208m3 /s in 14 year intervals with slopes of a statistical average of 25% which greatly exceeds 6% as provided for in the town planning code.

Keywords:

Subdivision, watershed, sealed area, satellite image, runoff coefficient, soil erosion.

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