NEWS

IAHS is pleased to announce that the 2025 Tison award goes to RuiRui Xu, Dexun Qiu and ChangXue Wu (China) for the paper: Xu, R., Qiu, D., Wu, C., Mu, X., Zhao, G., Sun, W., & Gao, P. (2023). Quantifying climate and anthropogenic impacts on runoff using the SWAT model, a Budyko-based approach and empirical methods. Hydrological Sciences Journal, 68(10), 1358–1371 https://doi.org/10.1080/02626667.2023.2218551. The paper is free to view. 

The award ceremony is scheduled to take place during the upcoming IAHS Scientific Assembly in Roorkee, India from 5 - 10 October 2025.

Congratulations!

In this issue of the HSJ Digest, learn more about video abstracts and free access to HSJ, and discover a range of Open Access articles together with the editors’ selection of highly topical research from the latest three issues of the Journal. In our regular ‘Meet the Editor’ slot, we profile the Editorial Office’s Kate Hill, who is at the heart of our interaction with editors and authors.

As we mark the end of Prof. Berit Arheimer’s distinguished presidency, we warmly thank her for her leadership and dedication to the International Association of Hydrological Sciences (IAHS) since 2021.

Berit, a Professor in Hydrological Research at the Swedish Meteorological and Hydrological Institute (SMHI), brought to IAHS a clear and inspiring vision:

1. To address major global challenges,
2. To advance the hydrological sciences, and
3. To connect people.

Under her leadership, IAHS has made meaningful strides across all three pillars:

In global engagement, Berit represented IAHS at the historic UN Water Conference in New York in 2023. She initiated the Science for Solutions Decade – HELPING – and served as its first Chair. This dynamic initiative now unites over 1200 scientists across more than 30 Working Groups worldwide, fostering collaborative solutions to today’s hydrological challenges.

In scientific outreach, Berit championed the creation of the IAHS Digital Water Globe, a new platform to showcase innovation and research across the community. She also oversaw the development and publication of the first HELPING community paper in the Hydrological Sciences Journal, exemplifying collaborative knowledge sharing. In advancing hydrological sciences, Berit laid the foundations for the IAHS Equality, Diversity and Inclusion (EDI), particularly in terms of the Falkenmark Award (one of the few hydrological awards named after a female scientist). 

In community building, Berit modernised the internal IAHS management processes and communication strategies, while strengthening our organisation’s partnerships with key international bodies such as EGU, WMO, UNESCO IHP, UN Water and others. Berit’s presidency has left an enduring legacy for the IAHS community and a strong foundation for the years ahead.

On behalf of the IAHS Officers, International Commissions, Working Groups, Committees and all our members around the world—thank you, Berit, for your vision, leadership, and tireless efforts. You leave with our deepest gratitude and warmest wishes for the future!

As we bid a heartfelt thank you to Prof. Berit Arheimer for her outstanding leadership over the past four years, we are pleased to officially welcome Prof. Salvatore Grimaldi as the new President of the International Association of Hydrological Sciences (IAHS). His term will run through to 2029.

Salvatore is based at the DIBAF Department, University of Tuscia, Italy, and brings a wealth of scientific experience, institutional insight, and an enthusiastic vision for the future of IAHS. He has been involved with the Association since as early as 2003, contributing to several key initiatives and roles — including the founding of STAHY Working Group (now known as International Commission of Statistical Hydrology ICSH), MOXXI Working Group and CANDHY Working Group.

His presidency begins at a time of renewed momentum for the Association, as we continue to advance the Science for Solutions Decade – HELPING and strengthen our global impact.

In the first months of his presidency, Salvatore has outlined several key priorities:

1. Supporting the Hydrological Sciences Journal (HSJ) as a central platform for the dissemination of cutting-edge hydrological research;
2. Developing new collaborative initiatives with the Intergovernmental Hydrological Programme (IHP) of UNESCO and World Meteorological Organization (WMO);
3. Promoting the new IAHS Scientific Assembly format, with a focus on enhancing both scientific quality and opportunities for networking;
4. Preparing a series of stakeholder-oriented community papers in support of the HELPING initiative;
5. Reinforcing the IAHS commitment to inclusivity and the active engagement of diverse scientific communities.

With his strong dedication to scientific excellence, international cooperation, and community building, Salvatore is ideally positioned to build on the solid foundation established by his predecessor and to guide IAHS into an exciting new chapter.

Please join us in extending a very warm welcome to Prof. Salvatore Grimaldi as he begins his tenure as IAHS President.

We are pleased to invite you to the upcoming webinar “Future of Sociohydrology”, organised as part of the Early Career Researcher (ECR) program for the 2^nd International Sociohydrology Conference, to be held in Tokyo this July.

This webinar aims to spotlight the voices of early career researchers in sociohydrology—to hear their experiences, insights, and perspectives as they navigate interdisciplinary research, integrative approaches, and long-term engagement in the field. We hope to foster an open and honest dialogue about the unique challenges and emerging opportunities ECRs encounter across diverse contexts.

Event Details

Date: July 7, 2025
Time: 4:00 PM–5:30 PM CET
Format: Online (Zoom)
Registration: Click here. Once your registration is complete, you will receive an automatic email with the Zoom link for the event.

Program Outline

1.Experience Sharing (30 minutes). Each panellist will have up to 7 minutes to speak about one or more of the following:

• Their personal and academic journey into sociohydrology
• Current research or themes that inspire them
• Specific challenges they’ve faced and how they’ve addressed them
• Regional perspectives on sociohydrology
• Emerging opportunities in their context

2.Speakers:

• Maurizio Mazzoleni – Vrije Universiteit Amsterdam
• Citlalli Madrigal – Portland State University
• Ryo Tsuchida – The University of Tokyo
• Apoorva Singh (SYSTA Awardee) – Indian Institute of Technology Delhi

3.Moderated Panel Discussion (30 minutes)

4.Audience Q&A (20 minutes)

Organizers: 
Malena Orduña Alegría, PhD – Assistant Professor, Biological & Ecological Engineering Department, Oregon State University
Faiz Alam, PhD – Researcher, International Water Management Institute (IWMI), India
Chamal Perera, PhD – Lecturer, Department of Civil Engineering, University of Moratuwa, Sri Lanka
Marlies Barendrecht, PhD – Lecturer, Department of Geography, King’s College London, UK.

We warmly invite you to join this thoughtful and forward-looking conversation on the future of sociohydrology!

IAHS and HSJ to join Bluesky for Hydrological Science Communication

The evolving landscape of social media presents IAHS with an important opportunity to reflect on how we engage with our global community. As part of our commitment to adapt our digital presence in line with IAHS values, strategic objectives, and member preferences, we are pleased to share our next step in this process.

While LinkedIn (both IAHS and HSJ) will remain our primary focus for social media engagement, we will also commence a trial of IAHS and HSJ accounts on the emerging platform Bluesky. 

We have the following official Bluesky handles:
  @iahs-aish.bsky.social for IAHS
  @hsj-iahs.bsky.social for Hydrological Sciences Journal

We welcome feedback from the IAHS community as we explore the potential of this platform. Please email us at [email protected]

We warmly encourage IAHS members and followers who are already on Bluesky to connect with us on these accounts. If you are new to the platform, this is an excellent opportunity to explore it and stay connected with IAHS and HSJ as we continue to promote collaboration, visibility, and the advancement of hydrological science worldwide.

Thank you for your continued support in strengthening IAHS’s global visibility and collaboration.

The winner of the 2025 IAHS Falkenmark Award for best PhD thesis has been announced as Dr Vinícius Bogo Portal Chagas from Brazil for his PhD thesis entitled "Hydrological extremes in Brazil: Large-scale patterns, mechanisms, and change". He has provided significant contributions to the understanding of large-scale patterns, mechanisms, and climate change impacts on water availability and coupled hydrological extremes in South America.

The award ceremony is scheduled to take place during the upcoming IAHS Scientific Assembly in Roorkee, India from 5 - 10 October 2025.

Congratulations Vinícius!

The Falkenmark Award for best PhD thesis:

• Recognises outstanding contributions to hydrological understanding of water scarcity and water supply.
• Is granted every year, starting 2023 (nomination must be submitted no later than 31 December).
• Highlights the importance of capacity building and knowledge/data gathering in financially disadvantaged countries.

Eligible nominees:

• Grew up in a financially disadvantaged country.
• Performed the PhD work in one or more financially disadvantaged countries.
• Holds a PhD certificate, which is dated within the last 2 years.

We are pleased to reaffirm that the Hydrological Sciences Journal (HSJ) is the official journal of the International Association of Hydrological Sciences (IAHS). 

Published since 1956, the Hydrological Sciences Journal (HSJ) is a globally recognised, peer-reviewed journal dedicated to the advancement of hydrology. It reflects the diverse, international, and interdisciplinary nature of our community and serves as a platform for innovative research, practical applications, and scientific dialogue.

As an IAHS member, you benefit from:

• Free access to HSJ through your IAHS membership if you are from a Financially Disadvantaged Country (FDC) 
• Opportunities to submit your research to a respected, community-driven journal
• Publish in the HSJ for free
• The chance to support and shape the future of hydrological science.

We encourage all members to read, cite, and promote HSJ within their networks, working groups, and committees. Your engagement ensures the continued impact and relevance of hydrological research worldwide.

Explore HSJ

Thank you for your continued contributions to the IAHS community.

As part of our shared commitment to strengthening collaboration across the hydrological sciences, we are writing to encourage your engagement with the IAHS Digital Water Globe (DWG), if you have not done so already.

The Digital Water Globe is an innovative tool specially designed for, and by, IAHS members. Here you can give visibility to (un)published results, research sites, datasets and find peers for collaborating around the world. It is designed to promote visibility, foster connections, and stimulate interdisciplinary collaboration.

While many IAHS members have received their DWG login credentials, we have noted that some are yet to complete their Personal Profiles or begin using the platform. To fulfil the potential of the DWG and support its growth, we kindly urge you to log in and complete your Personal Profile as soon as possible. Setting up your Personal Profile requires just a few minutes. To assist with this, we have created a set of comprehensive guides, and you will find them on our IAHS DWG webpage. The process is intuitive, and your contribution will ensure your role and expertise are visible within the DWG.

If you have questions or need assistance accessing your account, we are here to help.