Established to promote and set standards in the science and practice of hydrology.

Promotes interest and scholarship in scientific and applied aspects of hydrology. With meetings, events, publications, news, and resources.

Global association established to improve the state of water resources. Site provides information on membership, hosts a forum board, and posts related news and resources.

Nongovernmental organization established to bring together hydrologists from different parts of the world in promoting the hydrological sciences.

Describes membership, bylaws, articles, conferences, and grants.