The body of principles and rules of international law applicable to fresh water has developed in many different directions. Regulation, economization, environmentalization, humanization, and institutionalization are the foremost. While they are discernible from one another, they are also intertwined. The apparent clashes between some of them—in particular, environmental and human concerns on one hand, and economic concerns on the other—are palpable in certain contexts. The method for preventing these clashes relies on the promotion of an integrated and coherent approach to apprehending the environmental, economic, social, and cultural facets of fresh water. In this context, the critical role that the notion of integrated water resources management can play is explored in this chapter.