Supporting hydrology and related sciences worldwide

The IAHS community is more than 8700 strong with members in over 150 countries contributing to the extensive programme of conferences and workshops, online discussions and IAHS publications   

Members are kept informed of IAHS activities and benefit from discounts on publications − those in the poorest countries receive free online subscriptions to Hydrological Sciences Journal and other discounts. Membership is FREE  

IAHS, a non-profit making non-governmental scientific organization registered in the UK

Unsolved problems in hydrology

Watch IAHS President Günter Blöschl present the new initiative to generate a list of Unsolved Problems in Hydrology on the IAHS YouTube channel  

Discussion has taken place via the LinkedIn group IAHS - International Association of Hydrological Sciences

The framing publication is available as an author accepted manuscript in HSJ. ‘Twenty-Three Unsolved Problems in Hydrology (UPH) – a Community Perspective’ the open access link is 



The call for Research Themes and Working Groups of Panta Rhei marked the start of the involvement of the community in Panta Rhei. The results from the first Biennium are published in the HSJ in a free access paper entitled 'Panta Rhei 2013-2015: Global perspectives on hydrology, society and change'.
The Panta Rhei virtual series includes the following free access papers:  'Adaptation of water resources systems to changing society and environment: a statement by the International Association of Hydrological Sciences' and 'Scientific debate of Panta Rhei research – how to advance our knowledge of changes in hydrology and society?'

Keep up to date with the Panta Rhei news page.

IAHS is one of the eight constituent associations of IUGG (


100 Years of IUGG

Information on the centennary celebrations of IUGG can be found at

Details of the related open access Special Issue HGSS Volume can be found at

Two chapters with direct relevance are:

IAHS: a brief history of hydrology and

IACS: past, present, and future of the International Association of Cryospheric Sciences