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 GEP  Vol.7 No.7 , July 2019
Evaluation of Agricultural Practices Scenarios for Reducing Erosion in Buyo Lake Catchment (Sassandra; Côte d’Ivoire) by Use of GIS
Abstract:
This study has used RUSLE model factors within a GIS component to evaluate eroded soil and developed viable agricultural practices scenarios to reduce soil loss in Buyo Lake catchment in the Western region of C&#244 ;te dIvoire. Consequently, five study cases were tested as following: scenario 1—association of dense forest and crops with a high percentage of mulch; scenario 2—corn and sorghum combination by considering a high yield without conventional tillage; scenario 3—establishment of an herbaceous meadow; and scenario 4—association of palm, coffee, and cocoa with green cover. Scenario P was the setting up of straw mulch after corn or sorghum harvest. The erosion map resulting from these study cases showed by estimation, an average of soil loss of about 95 t/ha/year. The respective values obtained for the scenarios 1, 2 and 3 are 28 t/ha/year, 66 t/ha/year and 30 t/ha/year. This indicates a decrease of 68%. By scenario 4, the estimated average was 2 t/ha/year corresponding to a decrease of 98%. The combination of scenario 2 with scenario P gave soil losses average of 5 t/ha/year, i.e. a 95% reduction. This study shows that the association of palm, coffee, and cocoa with green cover would be very effective in reducing soil loss.
Cite this paper: Koua, J. , Anoh, A. , Soro, D. , Kouame, J. and Jourda, R. (2019) Evaluation of Agricultural Practices Scenarios for Reducing Erosion in Buyo Lake Catchment (Sassandra; Côte d’Ivoire) by Use of GIS. Journal of Geoscience and Environment Protection, 7, 154-171. doi: 10.4236/gep.2019.77011.
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