1. PhD Student, Cemagref - Hydraulic and Irrigation Research Unit, P.B. 31 Le Tholonet, 13612 Aix en Provence Cedex 1, France.
2. Research Engineer, Cemagref, Hydraulic and Irrigation Research Unit, P.B. 31 Le Tholonet, 13612 Aix en Provence Cedex 1, France (corresponding author).
3. Technical Staff, Cemagref, Hydraulic and Irrigation Research Unit, P.B. 31 Le Tholonet, 13612 Aix en Provence Cedex 1, France.
4. Head of Irrigation Research Team, Cemagref, Hydraulic and Irrigation Research Unit, P.B. 31 Le Tholonet, 13612 Aix en Provence Cedex 1, France.