Water Resources Research (WRR) is a peer-reviewed scientific journal published by the American Geophysical Union. AGU states that WRR is an "interdisciplinary journal integrating research in the social and natural sciences of water."The American Geophysical Union (or AGU) is a nonprofit organization of geophysicists, consisting of over 50,000 members from over 135 countries. AGU's activities are focused on the organization and dissemination of scientific information in the interdisciplinary and international field of geophysics. The geophysical sciences involve four fundamental areas: atmospheric and ocean sciences; solid-Earth sciences; hydrologic sciences; and space sciences.