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ISSN: 2157-7587

Hydrology: Current Research
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Research Article

Evaluation of Swat Performance on a Mountainous Watershed in Tropical Africa

Isaac Mutenyo1 , A Pouyan Nejadhashemi2 *, Sean A Woznicki2 and Subhasis Giri2
1 Kyambogo University, Department of Civil and Building Engineering, Uganda
2 Michigan State University, Department of Biosystems and Agricultural Engineering, USA
Corresponding Author : Pouyan Nejadhashemi A
Department of Biosystems and Agricultural Engineering
Michigan State University, USA
Tel: (517) 432-7653
Fax: (517) 432-2892
E-mail: [email protected]
Received April 30, 2013; Accepted September 02, 2013; Published September 07, 2013
Citation: Mutenyo I, Nejadhashemi AP, Woznicki AS, Giri S (2013) Evaluation of Swat Performance on a Mountainous Watershed in Tropical Africa. Hydrol Current Res S14:001. doi: 10.4172/2157-7587.S14-001
Copyright: © 2013 Mutenyo I, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

Soil and water assessment Tool is used to model the hydrology of a mountainous catchment in tropical Africa. Land cover and soil characteristics for the catchment were used to determine initial model parameters that were later adjusted during a calibration process. The model was calibrated and validated against measured stream flow. Although the model performed satisfactorily for simulating monthly river flows based on SWAT model calibration guidelines, it fell short of capturing daily peak flows. Average error on prediction of daily peak flows was -19.8%, while the median error was 10.8%.Overall, the average simulated daily peak flow was 2.6cms less than the corresponding observed daily peak flow, indicating a model tendency to under predict the magnitude of peak events. The inability of the model to capture peak flows was found to be the main limiting factor for its performance.

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