Riverbank Erosional Features in the Stanley Pool of the Congo River and Some Geotechnical Classifications of the Sands - Journal of Geoscience and Environment Protection

GEP > Vol.7 No.5, May 2019

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

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DOI: 10.4236/gep.2019.75014 627 Downloads 1,546 Views

Author(s)

Guy Dieudonne Moukandi N’Kaya¹, Narcisse Malanda¹, Olivier Florent Essouli², Bernard Mabiala¹, Alain Laraque³

Affiliation(s)

¹Mechanical, Energy and Engineering Laboratory/UNESCO Chair in Engineering Sciences/Ecole Nationale Supérieure Polytechnique, Marien Ngouabi University, Brazzaville, Congo.
²Geosciences Laboratory, Faculty of Sciences and Technology, Marien Ngouabi University, Brazzaville, Congo.
³Geosciences Environment Toulouse-UMR 5563 of CNRS, UMR 234 of Institute of Research for Development/Paul Sabatier University, Montpellier, France.

ABSTRACT

The Stanley Pool, an almost circular island about thirty kilometers in diameter, crossed by the Congo River, is subject to diversified erosion of its riverbanks. This study highlights description using geotechnical particle size distribution analysis of soils of the shoreline that make up the shoreline. Three critical areas of the island were examined to characterize the origins of these erosion phenomena. The results obtained show that the soil materials are mostly sands with very fine or fine grains characteristic of very unstable soils. The morpho-sedimentological characteristics of the areas studied show that these soils are plastic (with a Plasticity Index between 15 percent and 19 percent). The presence of water, action of currents or groundwater flow easily destabilize the materials that make up the riverbank and cause the fines to creep (Collapse of sandy riverbanks, Landslide of sandy riverbanks, …).

KEYWORDS

Erosion, Riverbanks, Congo River, Stanley Pool, Geotechnical Analysis, Particle Size Distribution

Share and Cite:

N’Kaya, G. , Malanda, N. , Essouli, O. , Mabiala, B. and Laraque, A. (2019) Riverbank Erosional Features in the Stanley Pool of the Congo River and Some Geotechnical Classifications of the Sands. Journal of Geoscience and Environment Protection, 7, 152-167. doi: 10.4236/gep.2019.75014.

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