Effect Evaluation of the Interaction Between the Atmosphere and the Soil on the Ngamakosso’S Embankment Stability, Talangaï, Brazzaville, Republic of Congo

Obami-Ondon Harmel^1, , Kempena Adolphe², Ngoma Mpemba Charmella Franche Amina², Rafael Guardado Lacaba³, Antonio Olimpio Gonçalves⁴ and Tathy Christian¹

¹Mechanical, Energy and Engineering Laboratory, Higher National Polytechnic School, Marien Ngouabi University, Brazzaville, Republic of Congo

²Department of Geology, Faculty of Sciences and Techniques, Marien Ngouabi University, Brazzaville, Republic of Congo

³Department of Geology, Faculty of Mines and Geology, Higher Institute of Mines and Metallurgy, Moa, Cuba

⁴Departement of Geology, Faculty of Sciences, Agostinho Neto University, Luanda-Angola

Cite this paper:
Obami-Ondon Harmel, Kempena Adolphe, Ngoma Mpemba Charmella Franche Amina, Rafael Guardado Lacaba, Antonio Olimpio Gonçalves and Tathy Christian. Effect Evaluation of the Interaction Between the Atmosphere and the Soil on the Ngamakosso’S Embankment Stability, Talangaï, Brazzaville, Republic of Congo. American Journal of Environmental Protection. 2024; 12(3):31-41. doi: 10.12691/env-12-3-1

Abstract

The stability of an embankment is analyzed by determining its safety factor. The present work consists of analyzing the effect of atmosphere-soil interaction on the stability of the embankment located in the Ngamakosso district (Talangai, Brazzaville, Congo Republic). The aim of this work is to carry out an in-depth study of this embankment using the finite element method in order to evaluate its stability. The study of the stability of natural slope using finite element method gave a low safety factor showing that the slope is unstable. However, earthworks by softening the slope angle as well as the establishment of vetiver-type plant cover had appositive influence and constituted an effective means of stabilizing this slope. The results obtained after these analyzes indicate that the embankment is in a satisfactory state of stability.

Keywords:
Ngamakosso embankment modeling atmosphere soil

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References:

[1]	Khoa, D, “Modeling landslides as a bifurcation problem”, National Polytechnic Institute of Grenoble-INPG. French. 245p. 2005.
[2]	Desodt, C., Launay, J., Molinaro, H., “Landslides, modeling and forecasting”, Ecole Normale Supérieure Paris-Saclay. 18p. 2017.
[3]	Fourier, A., “Predicting rainfall-induced slope instability”, Proceedings of the Institution of Civil Engineers. Geotechnical Engineering, 211 –218. 1996.
[4]	Tool, D., “Rainfall-induced landslides in Singapore”, Proceedings of the Institution of Civil Engineers: Geotechnical Engineering, 211-216. 2001
[5]	Rahardjo, H., Ong, T., Rezaur, R., and Leon, E., “Factors controlling instability of homogeneous soil slope under rainfall”, Journal of Geotechnical and Geoenvironment Engineering, 1532-1543. 2007.
[6]	Kempena, A., Lacaba, R., Milan, Y, and Columbié, T., “Mapping the population due to water erosion in the city of Brazzaville”, Mineray Geology, 144-162. 2017.
[7]	Kempena, A., Boudzoumou, F., Nganga, D., and Ray, H., “Cartography of environmental vulnerability to soil erosion of the urban area of Brazzaville using Geographic Information System (GIS)”, International Research Journal of Environment Science, 35-43. 2014.
[8]	H. Obami-Ondon, U. Gampio Mbilou, Raymond Gentil Elenga4, Médard Ngouala Mabonzo, D. Nkounkou Tomodiatounga1, B. Mabiala, ‘’Impact of the Seasonal Variability of the Rains on the Hydrodynamic Operation of the Aquifer Major of the Plateau of Mbe in Pool-Nord in Republic of Congo Brazzaville’’,Journal of Scientific and Engineering Research, 2019, 6(10): 173-184.
[9]	Samba, G., (2020) The climate of Congo Brazzaville, Paris, 2020, Edition l'harmattant, IBN 928-343-2. 244p.
[10]	Samba, K., “The climate of Lower Congo. Third cycle doctoral thesis”, University of Burgundy, CRC of Dijon. 280p. 1978.
[11]	Denis, B., “Explanatory note for the Brazzaville-Kinkala soil map”, People's Republic of Congo. Paris: ORSTOM. 101p. 1974.
[12]	Schwartz, D., “The soils around Brazzaville and their use”, ORSTOM, Pointe-Noire, 45p. 1987.
[13]	Cosson, J., “Explanatory note on the Pointe-Noire and Brazzaville sheets”, Geological reconnaissance map at 1/500,000. Brazzaville: Direct. Mines and Geol. AEF, 56p. 1955.
[14]	Dadet, P., “Explanatory note for the geological map of the Republic of Congo Brazzaville at 1:500,000, 1969 Paris: BRGM Memoirs n°70.
[15]	Boudzoumou, F., “The West Congolese chain and its foreland in the Congo: relationship with the Mayombian; sedimentation of sequences of Late Proterozoic age”, Marseille: Doctoral thesis, University of Law, Economics and Sciences of Aix-Marseille, France. 220p. 1986.
[16]	Miyouna, T., Malounguila-Nganga, D., Essouli, O., Ndembé-Ndembé, A., Moussiéssié, J., Kinga Mouzéo., Boudzoumou, F., “Paleo-environmental study of detrital deposits of the cover formation”, CAMES-Vol 4, Num.01. ISSN 2424-7235. 2016.
[17]	Miyouna, T., Elenga, H., Boudzoumou, F., Essouli, OF, IbaraGnianga, A., Sow, E., “Sedimentary dynamics of the Pointe Noire Cover Formation in Brazzaville, southern Republic of Congo”, Africa Science, 15 (4), ISSN 1813-548X, 134 – 155. 2019.
[18]	Agence Nationale d’Aviation Civile (ANAC), 2023.
[19]	Pilot, G., “Landslides directly linked to works”, Revue Française de Géologie No 17, 55-69, 1981.
[20]	Indra, N., “A contribution to the analysis of slope stability with the finite element method”, Graz University of Technology, Austria. 133p, 2012.
[21]	Lane, PA, Griffiths, D., “Evaluation of the stability of slopes in drawdown conditions”, Journal of Geotechnical and Geoenvironmental Engineering. Flight. 126(S), ASCE, 443-450, 2000.
[22]	Ossou, B., “Modeling the stability of an embankment using the limit equilibrium method: case of the embankment located in Ngamakosso, talangai, Brazzaville”, Master's thesis, Faculty of Science and Technology, Marien Ngouabi University, Republic of Congo. 84p, 2022.