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Communication incl. Poster: BibTeX citation key:  Afouda
Afouda, A. & Alamou, E. 2009. Implementation of two hydrological models on Oueme River basin (Benin): Least Action Principle based hydrological model and GR4J. Work presented at Third International AMMA Conference, July 20—24, at Ouagadougou, Burkina Faso.
Added by: Devic 2009-10-06 11:17:14    Last Edited by: roussot 2009-10-18 17:12:32
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Categories: Environment and Climate Monitoring
Keywords: Hydrology
Creators: Afouda, Alamou
Publisher: African Monsoon Multidisciplinary Analyses (Ouagadougou, Burkina Faso)
Collection: Third International AMMA Conference

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Abstract
Climate variability and climate change have great implication for the hydrological cycle and water resource planning. Climate change also affect the safety and quality of the human and natural environment through an increase in extreme events and a decrease in water quality, which may be far beyond the range of prior observations and experiences. The resulting modifications in rainfall-runoff relationship will require physically based approaches that can take into account both climate variability and land cover changes.
The basic idea of the present paper is that the effective governing equations for such heterogeneous system at large scale is different in form from the equations describing small scale physics. A theoretical study that integrate the point-scale physics across spatial domain is therefore considered in the form of Least Action Principle based Hydrological Model as proposed in previous studies by Afouda et al. (2004, 2005, 2009).
Implementation of this model is made using Oueme river basin data (Benin) at Beterou station. The performance of this model is compared with the results of implementation of the well known GR4J-Model. Despite their differences in structure and representation of hydrologic processes the two models results was the ability of the new model to accurately represent low-flow and high-flow behavior with a single set of parameter values. Analysis of these results lead to the conclusion that the Least Action Principle based Hydrological Model is a promising tool towards “getting the right answers for the right reasons” to both operational purposes and theoretical questions.
Last Edited by: roussot