Legal and Political Agreements for Sharing International Rivers with Water Shortage

We develop normative investigation of sharing international rivers. First, we pro- pose the model of water problems in the situation where a river aows through several states with the possibility of water shortage. We derive claims problems from the water problems. We axiomatize the family of convex combinations of the propor- tional and the equal awards rules for water claims problems. Using a unique claim vector constrained by geographic factors of a watercourse and the majority voting rule, we demonstrate how to determine the legal and political agreement of water problems.