Journal
JOURNAL OF HYDROLOGY
Volume 536, Issue -, Pages 1-9Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhydrol.2016.02.022
Keywords
Shallow water; Saint Venant; Overland flow; Rain; Friction; Poiseuille
Funding
- Axa Research Fund through a JRI Grant
- ANR project METHODE [ANR-07-BLAN-0232]
- Agence Nationale de la Recherche (ANR) [ANR-07-BLAN-0232] Funding Source: Agence Nationale de la Recherche (ANR)
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Modeling and simulating overland flow fed by rainfall is a common issue in watershed surface hydrology. Modelers have to choose among various friction models when defining their simulation framework. The purpose of this work is to compare the simulation quality for the Manning, Darcy-Weisbach, and Poiseuille friction models on the simple case of a constant rain on a thin experimental flume. Results show that the usual friction law of Manning is not suitable for this type of flow. The Poiseuille friction model gave the best results both on the flux at the outlet and the velocity and depth profile along the flume. The Darcy-Weisbach model shows good results for laminar flow. Additional testing should be carried out for turbulent cases. (C) 2016 Elsevier B.V. All rights reserved.
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