24th WaterNet/WARFSA/GWP-SA Symposium

IAHS are pleased to be a partner in the upcoming 24th WaterNet/WARFSA/GWP-SA Symposium.

The 24th WaterNet/WARFSA/GWP-SA Symposium will be held in Zanzibar, United Republic of Tanzania at the Verde Hotel Resort, 25 – 27 October 2023 under the theme Accelerating Change: Fostering Innovation and Integration for Sustainable Water Resources Management in East and Southern Africa

The Symposia have been held annually in the Eastern and Southern African regions for the past 23 years to promote interaction among policymakers, academics, practitioners from water and related sectors, and cooperating partners. Together, they identify regional issues, gaps and priorities that require further research and support. Great emphasis has been placed on integration of knowledge, particularly involving scholars from the natural and social sciences.

This year’s symposium sub-themes have been aligned to the achievement of Sustainable Development Goals (SDGs) and themes of the World Water Day 2023 and the SADC Water Research Agenda under the Regional Strategic Action Plan (RSAP) on Integrated Water Resources Development and Management Phase V, whose main objective is:

• Promoting evidence-based implementation of SADC water programmes and projects through multi- and inter-disciplinary research, and synthesis of existing and new information, which will lead to a realization of SADC developmental goals.

For more information including registration details please read the Second Call

5th IAHS-ICWQ Workshop

The IAHS International Commission on Water Quality (ICWQ) will host a workshop entitled 'Flood-Drought Disaster Chain and Water Ecological Degradation in the Changing Environment' 2-3 December 2023 in Zhuhai City, China.

Topics will include:

1. Intelligent monitoring of hydrology and water ecology for the early perception of water risk
2. Extreme storm and non-point source pollution in the changing environment
3. Flood-drought-aquatic ecology modeling and risk early warning
4. Prediction of drought-flood alternation and flood-drought disaster chain
5. Water ecological responses to human activities and climate change
6. Storm surge - heavy rain - flood - waterlogging - ecological degradation "multi-encounter" and its derivative disaster occurrence
7. Simulation, prediction and assessment of flood and drought disasters and their derivative composite disasters
8. Restoration and governance of water ecological degradation 

Registration is free.

Abstracts of no more than 300 words should be sent to Prof. LIU Zhiyoug ([email protected]) before November 10th, 2023.

IAHS Website Upgrade


Thanks to the amazing team of people behind the design of our IAHS new website, we are so pleased that it has been so positively received. Whilst it may not be perfect, we’re still working on it. The site will be getting new features over the next few months, as we look to expand our presence further. The next feature will require a migration of our website and although this should not take longer than a day to complete, the IAHS will be under construction for most of Thursday 21st September 2023.

Thank you in advance for your patience and continued support.


4th International Conference on Snow Hydrology

Dear Colleagues, 

Join the 4th International Conference on Snow Hydrology and submit your abstract. SnowHydrology2024 will provide an excellent opportunity to discuss recent advances in all aspects of snow hydrology at a dedicated conference. It will be the event to meet your peers and exchange latest ideas in a focused and informal setting. SnowHydrology2024 will be hosted in Grenoble, France, in the foothills of the Alps not far from the famous Mont-Blanc.

Visit for more information and submitting your abstract. The abstract submission deadline is October 15th 2023. We look forward to meeting you next year in Grenoble!

Best regards,

SnowHydrology2024 Conference Committee:

Tobias Jonas, Francesco Avanzi, Carlo Carmagnola, Nicolas Champollion, Thomas Condom, Marie Dumont, Isabelle Gouttevin, Matthieu Lafaysse, Florence Naaim, Claudia Notarnicola, Melody Sandells

A Call For Theme Leaders


More than 30 Working Groups have been suggested and, although the call to suggest Working Groups is now closed, you have until Friday, 29 September to sign up to an existing working group (link). The Working Groups are linked to three main themes:

  • HELPING with global and local interactions
  • HELPING with holistic solutions for water security
  • HELPING with cross-cutting goals.

We invite you to apply for the role of Theme Leader for one of the three clusters of Working Groups. Leaders will be appointed biennially during the decade as per the previous IAHS Scientific decades (PUB and Panta Rhei). The role of the Theme Leaders will be to coordinate activities within each cluster of Working Groups, to share information, follow up on progress, arrange meetings and joint activities such as workshops, outreach activities, collaborative publications or projects. They will help and guide the appointed Working Group Leaders, and they will report to the IAHS management team (see figure on organisation below).

To be considered as a potential Theme Leader, please complete this Google Form before 15 October 2023. If you cannot access the online Google form, please contact the IAHS office on [email protected] for more assistance via a .pdf form. Each applicant will be contacted directly via email by the IAHS office and the following documents will be requested;

  • A covering letter no longer than 1 page
  • A resume no longer than 2 pages
  • At least two contactable references.

Once all applications have been received by 15 October 2023, the call will be closed and the IAHS management team will evaluate the applications based on documented leadership skills, scientific knowledge in the field, experience in community management, and personal engagement/qualities. The results will be announced in November.

Keep updated on the timetable and the strategic planning process of HELPING at the IAHS website HERE

Update on the IAHS HELPING Science for Solutions Decade

The next IAHS decade is dedicated to local solutions under the global water crisis. The short name is HELPING, and stands for Hydrology Engaging Local People IN one Global world. Read more in the Concept Note.

HELPING underpins solutions for the water crisis, leaving no catchment or hydrologist behind, in search for scientific evidence to:

·          Accelerate the understanding of the linkages between hydrological processes at local and global scales and their interaction with water resources.
·          Engage with local scientists and societies to learn from local experience, differences in hydrological processes and change around the world, and transfer solutions globally.
·          Synthesise hydrological understanding across the globe and underpin the management of current crises by finding holistic solutions to mitigate future crises.

The Community effort

The decade seeks for a bottom-up process empowered by local hydrologists and scientists using open science and local data/methods when solving local water problems. We envisage that the building of local knowledge and cooperation can inform scientists working under similar situations or facing unexpected events worldwide (e.g. learning from floods or droughts in one catchment will inform hydrologists and water management in other catchments).

After outcomes of several online interactions and workshops during the year, as summarised in the Córdoba document and Vienna document, the new scientific decade was launched during the IUGG General Assembly in Berlin, Germany in July (Fig. 1),  including the selection of a logo (Fig 2.) to represent the decade. The strategic planning document describes how the community’s vision will be translated into action by engaging the IAHS membership. These documents along with comments in the archive of the online Forum are the basis for writing a visionary community paper in HSJ, to which all participants soon will be invited for Author contributions.

Fig 1. The proposed strategic planning process (SPP) version 1.0

Fig. 2. Winning logo for the HELPING Science for Solutions decade voted on by those present at the IUGG Assembly in Berlin.

Way forward

Some 30 Working Groups have been suggested so far and the call is now closed. You can still sign up to an existing working group until the end of September (link).

The working groups are linked to three main themes:

·          HELPING with global and local interactions
·          HELPING with holistic solutions for water security
·          HELPING with cross-cutting goals

The IAHS management team act as a coordinating Steering Group setting up the structure for the decade to facilitate engagement from IAHS Commissions and Working groups. After mid-September an open call will be announced at the IAHS website for leaders of the three Working Group Themes. Leaders will be appointed biennially during the decade as per the previous IAHS Scientific decades (PUB and Panta Rhei, Fig. 3). The IAHS President Berit Arheimer is leading the initial phase 2023-2024. Everyone who signed up as working group members will be invited to an online meeting in November when the Working Groups will be finalised. Another aim is to wrap-up by the end of the year the IAHS HELPING community paper for publication in HSJ by the end of the year.

Keep updated on the time-table and next call for participation at the IAHS website HERE

Fig 3.  



A Citizen Science project on hydrological data in Italy: SIREN (Saving Italian hydRological mEasuremeNts)

The availability of long and reliable time series of hydrological measurements is essential for hydrological analyses and research; however, these series are often fragmented and not easily accessible because parts of the measurements are still stored in printed volumes of the Hydrological Yearbooks. For this reason, Paola Mazzoglio (Politecnico  di Torino) and Miriam Bertola (TU Wien) have recently launched a citizen science project to digitize historical hydrological measurements in Italy. The project seeks to involve not only hydrologists but also ordinary people in the crowdsourcing of the data gathering and processing for advancing hydrological research, contributing to the transdisciplinary action of the IAHS CANDHY (Citizen AND HYdrology) Working Group. Anyone wishing to contribute, even with just 10 minutes of their time, can find an easy digitisation tool on the project website.

Project page: 

IAHS CANDHY web page 

Creating a digital Robert Elmer Horton archive – a crowd funding initiative

At the H15 History of Hydrology Session at the IAHS meeting in Berlin in July 2023 a new initiative was announced to fund the creation of a complete archive of the works of Robert Elmer Horton (1875-1945) who was the pre-eminent hydrologist of the English speaking world in the first half of the 20th Century.   He was a founder member and first vice-President of the Hydrological Section of the AGU.   On his death his papers were organised by Walter Langbein into 94 boxes and placed in the US National Archives.   As far as we know, these have only been accessed three times:  about 20 years ago by Keith Beven (KB) who examined 10 of the boxes (see Beven JH, 2004, HP, 2004a,b); by Jim Smith of Princeton who accessed some more in preparing for his AMS Horton Lecture; and most recently by Solomon Vimal, currently at Cornell Tech.   

Solomon discovered the value of Horton’s work on Lake Evaporation as part of his PhD thesis.  He has recently been on a long road trip (funded personally and by the MIRA Foundation) to visit Horton’s home in Voorheesville, NY (where apparently there are are still some old instruments in the barn), the nearby Horton Falls (formerly the LaGrange falls, with an interesting history of a land dispute with the LaGrange family), his alma mater of Albion College (which holds still more of his papers) and to Parma, Michigan where he was born (and where there are still Hortons).  Solomon’s searches have increased the known Horton published works from the 80 works listed in the biographical paper on Horton by Francis Hall in 1987, to over 200 (including a book of short stories).  We are still hoping that we will discover a new photograph of Horton to add the one that is always reproduced from when he was President of the American Meteorological Society.

We feel it would be valuable to the hydrological community to now produce an online archive of Horton’s works so that they can be much more accessible to all (right now only 86 of his papers are digitized and available via the Influential Hydrologists project of the AGU Hydrology section, initiated by Efi Foufoula-Georgiou).  KB can personally vouch for the fact that what is in the few boxes he managed to look at is absolutely fascinating (including an unpublished Manual of Infiltration) and gives new insights into Horton’s character and ideas – which were much more sophisticated than the simple  “infiltration excess overland flow” concept for which he is now remembered.   Solomon has had 4 of the boxes of papers held there scanned so there are just another 90 boxes to go!  

20 years ago it was possible only to take photocopies of the most important papers. With more modern technology it would be possible to digitise all of the material – but this will require funding for staff time and hosting the archive.  Hence the idea of crowd funding the initiative.  If you feel this is a worthwhile project then please donate (any amount large or small) at the GoFundMe site 

Keith Beven (Lancaster University) with Efi Foufoula-Georgiou (UC Irvine), Vijay P. Singh (Texas A&M)


Beven, K J, 2004, Surface runoff at the Horton Hydrologic Laboratory (or not?), J. Hydrology, 293, 219-234.

Beven, K J, 2004, Robert Horton's perceptual model of infiltration, Hydrological Processes, 18, 3447-3460.

Beven, K J, 2004, Robert Horton and abrupt rises of groundwater, Hydrological Processes, 18, 3687-3696.

STAHY 2023 - 13th International Workshop on Statistical Hydrology

The STAHY 2023 workshop brings together the international statistical hydrology community for vibrant scientific discussions and debates on advanced statistical methods for hydrological applications. This year's theme aims to bridge the environmental statistics and artificial intelligence communities with vibrant scientific discussions and debates on advanced statistical methods to solve climate, water, and sustainability issues. Focusing on the broader scope of the Sustainable Development Goals (SDGs) established by the United Nations in 2015, the theme of the workshop is expected to address several goals but are not limited to Clean Water and Sanitation (SDG 6), Sustainable Cities and Communities (SDG 11), Climate Action (SDG 13), and Life on Land (SDG 15). 

This year, the International Commission on Statistical Hydrology (ICSH) of the International Association of Hydrological Sciences (IAHS) invites researchers to submit abstracts for presentation at the 13th International Workshop on Statistical Hydrology (STAHY2023), which will be hosted by Northeastern University in Boston, Massaschuetts (USA), from 8-10 November 2023.

All the information that you need to know about the workshop, the programme, registration, abstract submission, the committees, and the venue can all be found right here

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