Mapping of great erosion in cities of Kinshasa and Brazzaville, Equatorial Africa

Alyson Bueno Francisco

doi:10.46380/rias.v8.e420

Authors

Alyson Bueno Francisco Universidade Estadual Paulista, Brasil

DOI:

https://doi.org/10.46380/rias.v8.e420

Keywords:

gully, road, slope, topography

Abstract

Since the 1980s, gullies have been a problem for the cities of Kinshasa and Brazzaville, whose research presents the case of 3 gullies located in the Congo River Basin in urban and peri-urban areas. The objective of the research was to present a digital model of elevation of urban gullies, with topographic data used in engineering projects for future recovery. The acquisition of topographic data was carried out through the Google Earth Pro software and the QGIS geographic information system, with data processing for visualization in the Golden Surfer software. The Laloux gully located in Kinshasa is one of the largest in the world, with a length of 1,100 m and a 3-way format. The mouth of the city of Brazzaville has a width of less than 40 m, but is more than 900 m long, in a densely populated area. The Buma gully in Kinshasa is an example of the development of the erosive process in a peri-urban area, with the expansion of one of the largest cities on the African continent, being induced by the existence of a road on a slope.

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