Determination of a Mathematical Model of Erosion Taking into Account the Intensity of Rainfall and Soil Slopes from the Global MNT Model
- 1 Department of Rural Engineering, FASA University of Dschang, Dschang, Cameroon
- 2 Department of Civil Engineering, ENSPD, University of Douala, Douala, Cameroon
- 3 Department of Civil Engineering, ENSPD, University of Douala, Douala, Cameroon
- 4 Department of Mechanical Engineering, College of Technology, University of Buea, Buea, Cameroon
- 5 Department of Rural Engineering, FASA University of Dschang, Dschang, Cameroon
- 6 Department of Civil Engineering, ENSET, Douala, Cameroon
- 7 Laboratory of Mechanics and Modeling of Physical Systems, University of Dschang, Dschang, Cameroon
- 8 Department of Civil Engineering, ENSET, Douala, Cameroon
- 9 Department of Civil Engineering, ENSET, Douala, Cameroon
Abstract
Our study is being carried out in the Wouri Estuary more precisely in the Nylon area, Douala. This area is influenced by abundant rainfall which promotes the phenomenon of rain erosion. This erosion contributes to the degradation of structures and soils. To better understand and predict this phenomenon of rainfall erosion, we set out to establish a mathematical model that takes into account precipitation and topography. To this end, the data collected in the field and in the laboratory made it possible. First, we graphically modeled the variation of the potential as a function of the intensity of rainfall and the slope of the ground. Next, we identified a mathematical model from cubic spline surface interpolation. Finally, we obtained the mathematical model which makes it possible to evaluate and predict the erosion potential. The results obtained allowed to have an erosion potential of 153.67 t/ha/year with field data and 153.94 t/ha/year with laboratory data. We compared the results obtained with those existing in the literature on the same study site. This comparison made it possible to validate the established mathematical model. This mathematical model is a decision support tool and can predict problems related to water, erosion and the environment.
- Algayer, B. and Darboux, F. (2011) Milieux poreux et transferts hydriques. 57, 2011. Journées Scientifiques du GFHN; 8. Colloque GEOFCAN; Milieux poreux et géophysique, Orléans, FRA, 78-81.
- Duchemin, M., Mabit, L., Lachance, M., Bernard, C., Morin, G., Lagacé, R. and Laverdière, M.R. (2002) évaluation du bilan sédimentaire d’un petit bassin versant agricole à l’aide du modèle CEQéROSS et des mesures au césium-137. Agrosol, 13, 23-34.
- Sharma, P.P., Gupta, S.C. and Rawls, W.J. (1991) Soil Detachment by Single Raindrops of Varying Kinetic Energy. Soil Science Society of America Journal, 55, 301-307. https://doi.org/10.2136/sssaj1991.03615995005500020001x
- Singer, M.J. and Le Bissonnais, Y. (1998) Importance of Surface Sealing in the Erosion of Some Soils from a Mediterranean Climate. Geomorphology, 24, 79-85. https://doi.org/10.1016/S0169-555X(97)00102-5
- Pham, T.L., Maloula, A., Duc, M., Reiffsteck, P., Chevalier, C. and Guedon, S. (2007) Dispersion par un fluide de la fraction fine argileuse continue dans les milieux poreux que sont les sols, Milieux poreux et transferts hydriques, Bulletin du Groupe Francophone Humidimetrie et traNsferts en milieux poreux, no. 53, 23-28.
- Markhi, A., Laftouhi, N.-E., Soulaimani, A. and Fniguire, F. (2015) Quantification et évaluation de l’érosion hydrique en utilisant le modèle RUSLE et deposition intégré dans un SIG. Application dans le basin versant N’FIS dans le haut atlas de Marrakech (Maroc). European Scientific Journal, 11, 340-356.
- An, J., Zheng, F.L., Lu, J. and Li, G.F. (2012) Investigating the Role of Raindrop Impact on Hydrodynamic Mechanism of Soil Erosion under Simulated Rainfall Conditions. Soil Science, 177, 517-526. https://doi.org/10.1097/SS.0b013e3182639de1
- Mbiakouo, E.F., et al. (2018) Etude du transport des sédiments lors de l’écoulement des eaux de pluie et évaluation de leurs impacts sur les habitations: Application dans la zone Nylon, estuaire de Douala. Thèse de Doctorat/PhD en Sciences de l’Ingénieur Université de Ngaoundéré, 2018, 234 P.
- Gangbazo, G., Cluis, D. and Bernard, C. (1994) Contrôle de la pollution diffuse agricole à l’échelle du bassin versant. Sciences et Techniques de l’Eau, 27, 33-39.
- Villeneuve, J.P., Blanchette, C., Duchemin, M., Gagnon, J.F., Mailhot, A. and Rousseau, A.N. (1998) 1325 HESSD 4, 1301–1335, 2007 Applications and Developments of GIBSI R. Quilbe and A. N. Rousseau Title Page Abstract Introduction Conclusions References Tables Figures Back Close Full Screen/Esc Printer-friendly Version Interactive Discussion EGU Roux, M., Tremblay, J. F., and Turcotte, R.: Rapport Final du Projet GIBSI: Gestion de l’Eau des Bassins Versants a l’Aide d’un Système Informatisé. .