With the science of hydrological diversity, political and social of the country, ABRHidro recognizes that the treatment of water resources problems in different regions should be different. ABRHidro has several Regional branches distributed among Brazilian states. These Regional representations intended to fulfill ABRHidro´s goals in their states and regions. Members of the ABRHidro can cooperate with the organization of courses, conferences and seminars, as well as act in cooperation with other Regional branches. ABRHidro should be a forum for discussion of the problems of water resources with regional coverage, providing means to find the best solution, taking into account the interests of society.