| 21 | Control des crues dans des régions arides et semi-arides” . | .Hassanzadeh, Y | Hydrotop 96, Marseille, France | 1996 |
| 22 | The Environmental impacts of Rising level of Caspian Sea | .Hassanzadeh, Y | Third Baku International Congress on Energy, Ecology, Economy | 1995 |
| 23 | Optimisation des Ressources Hydrauliques | .Hassanzadeh, Y | Hydrotop´ 94 | 1994 |
| 24 | Rapidly varied unsteady flow study in a small-Scale model | .Hassanzadeh, Y | International Conference on Hydrodynamic | 1994 |
| 25 | Environmental effect of Reservoir Sedimentation | .Hassanzadeh, Y | Second Baku International Symposium | 1993 |
| 26 | Dam-break wave in an open channel”, Wuhan, China | .Hassanzadeh, Y | International Symposium on Hydraulic Research in Nature and Laboratory | 1992 |
| 27 | Study of the logarithmic law of the velocity distribution in two phases flow | Hassanzadeh, Y | sixteenth congress on large dams, San Francisco, U. S. A. | 1988 |
| 28 | Critère de début d’entraînement des matériaux constitutifs du lit d’un cours d’eau | Hassanzadeh, Y | VIth IWRA World Congres, Ottawa., Canada | 1988 |
| 29 | The problem of sediment transport in rivers | Hassanzadeh, Y | IWRA Seminar, Rome, Italy | 1987 |
| 30 | Hydrodynamics of Two-Phase flow”, fifteenthcongress on large dams | Hassanzadeh, Y | ICOLD, Lausanne, Suisse | 1985 |
| 31 | Utilisation combinée des eaux souterrains et des eaux de surface | Hassanzadeh, Y | 5th IWRA Congres on Water Ressources, Bruxelles Belgique | 1985 |