The International Association for Hydro-Environment Engineering and Research (IAHR), founded in 1935, is a worldwide independent organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydro-informatics and continuing education and training. IAHR stimulates and promotes both research and its application and by doing so it strives to contribute to sustainable development, the optimisation of world water resources management and industrial flow processes.

IAHR accomplishes its goals through a wide variety of member activities including working groups, a robust research agenda, congresses, specialty conferences, workshops and short courses; journals, monographs and proceedings; by involvement in international programs such as UNESCO, WMO, IDNDR, GWP, ICSU and by co-operation with other water-related international organizations.