Abstract
In water resources planning, reallocation of water between conventional and new purposes is becoming more critical for efficient use of resources. The interests of existing users and newly emerged users should be coordinated to implement reallocation. However, planning authority may not be well informed of preferences of players (users) involved in the projects. This results in the difficulty in resolving conflicts and specifying of the project that improves all players' situation. In this study, the conflict is modeled based on game theory. Then the conditions that an outcome is stable for all players is specified by extending robustness analysis method.