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Riverbank Erosional Features in the Stanley Pool of the Congo River and Some Geotechnical Classifications of the Sands

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Document pages: 16 pages

Abstract: The Stanley Pool, an almost circular island aboutthirty kilometers in diameter, crossed by the Congo River, is subject todiversified erosion of its riverbanks. This study highlights description usinggeotechnical particle size distribution analysis of soils of the shoreline thatmake up the shoreline. Three critical areas of the island were examined tocharacterize the origins of these erosion phenomena. The results obtained showthat the soil materials are mostly sands with very fine or fine grainscharacteristic of very unstable soils. The morpho-sedimentological characteristics of the areas studied show that thesesoils are plastic (with a Plasticity Index between 15 percent and 19 percent). The presence of water, action of currents or groundwater flow easilydestabilize the materials that make up the riverbank and cause the fines tocreep (Collapse of sandy riverbanks, Landslide of sandy riverbanks, …).

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