A framework for the use of soil and water conservation models in sub-saharan west Africa
2003
Kevin Brannan (Department of Biological Systems Engineering, Verginia (USA)) | Modou Sene | Russell Yost | Antonio Querido | Richard Kalblan | Saied Mostaghimi
Soil and water conservation modeling is a powerful tool in the management of agricultural and natural resources. Computer simulation models can be used to achieve various objectives, such as reduction of soil erosion, conservation of water, and protection of water quality. Within these objectives, there are many different approaches to soil and water conservation modeling. These approaches generally differ in the degree of detail natural processes are simulated, the aerial extent considered in the simulation, and the time period modeled. In this paper we provide a general introduction to soil and water conservation modeling and some examples specific to the sub-saharan region of west Africa. The KINEROS model is used in this example and the effectiveness of the conservation practices is investigated for land slopes ranging from 2 to 18%. The second example uses the KINEROS model applied to a watershed in Mali to investigate the effectiveness of a system of conservation practices in reducing sediment and runoff leaving the watershed. The final example uses spatial and data modeling procedures in a GIS environment to identify erosion potential for areas in a large drainage basin in Mali.It is hoped the information provided in this paper will serve to enhance the use of soil and water conservation modeling in the development of sustainable agricultural systems in the region.
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