**Company no: 02676180 Charity no: 1078635** 

## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED (A company limited by guarantee)** 

**Report and Unaudited Financial Statements for the Year Ended 31 December 2025** 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Financial Statements for the Year Ended 31 December 2025** 

|**Contents**|**Pages**|
|---|---|
|Report of the Trustees|1 - 11|
|Independent Examiner’s Report to the Trustees|12|
|Statement of Financial Activities|13|
|Comparative Statement of Financial Activities|14|
|Balance Sheet|15|
|Notes to the Financial Statements|16 - 21|



**The following page does not form part of the statutory financial statements** 

Detailed Income and Expenditure Statement 22 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025** 

The trustees are pleased to present their annual report together with the financial statements for the year ended 31 December 2025.  The trustees have adopted the provisions of the Statement of Recommended Practice (SORP) “Accounting and Reporting by Charities” in preparing the annual report and financial statements of the charity. 

## **REFERENCE AND ADMINISTRATIVE DETAILS** 

## **Directors & Trustees** 


**----- Start of picture text -----**<br>
The directors of the charitable company are also trustees for the purpose of charity law.<br>The trustees and officers who served during the year and since the year end were as follows:<br>Directors & Trustees: Prof K Heal (resigned June 2026)<br>Dr B M Arheimer (resigned July 2025)<br>Prof J-M Kileshye Onema<br>Dr K Soulis (appointed January 2025)<br>Miss H Houghton-Carr (appointed February 2025)<br>Prof S Grimaldi (appointed July 2025)<br>Dr M Sandells (appointed June 2026)<br>Secretary: Miss H Houghton-Carr<br>Registered Office 10 Broad Street<br>Abingdon<br>Oxfordshire<br>OX14 3LH<br>Company number: 02676180<br>Charity number: 1078635<br>Business address UK Centre for Ecology & Hydrology<br>Wallingford<br>Oxfordshire<br>OX10 8BB<br>Accountants Wenn Townsend Accountants Limited<br>10 Broad Street<br>Abingdon<br>Oxfordshire<br>OX14 3LH<br>Manager: Dr C Lupton<br>**----- End of picture text -----**<br>


Page 1 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees** 

**For the Year Ended 31 December 2025 (Cont.)** 

## **STRUCTURE, GOVERNANCE AND MANAGEMENT** 

## **Governing document** 

The charity is constituted as a company limited by guarantee and is therefore governed by its articles of association. 

## **Appointment, induction and training of trustees** 

When there is a requirement for new trustees, these are identified and appointed by the remaining trustees. The charity trustees include the following officers of the Bureau of the International Association of Hydrological Sciences (IAHS, the Association): President, Secretary General and Treasurer, the former two being elected positions. The board appoints a Chair and a Secretary (who automatically become trustees and members of the board of the charity and Association Bureau members if they are not already). 

The changes in Directors and Trustees in 2025 are all planned. The President of the Association changed in July 2025 due to elections and thus one director and trustee of the company changed to align. Due to her retirement, K. Heal stepped down in 2025 and 2026 from the roles of Treasurer of IAHS and Chair of IAHS Ltd, respectively. Successors were appointed following IAHS and IAHS Ltd procedures and were supported in a transition period into the roles. As Secretary of IAHS Ltd since 2017, H. Houghton-Carr has always been a Trustee and, since 2025 is now recognised as a Director as well. The induction of the new trustees involves making them aware of a trustee’s responsibility, the governing document and administrative procedures of the charity. 

## **Organisation** 

The charity is organised so that the trustees meet regularly to manage its affairs. A manager is appointed by the trustees whose responsibilities include the day-to-day running of the charity, currently the IAHS Ltd Executive Secretary. They are one of the four part-time staff members employed by IAHS Ltd to help achieve the charity’s objectives.  The trustees use the ‘Charity Governance Code’ (updated in November 2025) to inform and support continuous improvement in its practice and governance. All trustees are members of the International Association of Hydrological Sciences (IAHS) supported by the charity. The trustees do not receive any remuneration, other than expenses incurred in their activities for the charity. 

The scientific leadership and activities of IAHS are conducted by volunteers who are members of IAHS. Such roles and activities include the officers of the IAHS Bureau and Commissions, editors of the IAHS journal - _Hydrological Sciences Journa_ l ( _HSJ_ ), and meetings organisation. More information on the organisation and governance of IAHS is available at https://iahs.info/About-IAHS/Organisation/. 

The charity’s objectives are the same as IAHS as set out in the IAHS Statutes (https://iahs.info/AboutIAHS/Statutes---En/), which are reviewed every 4 years in the IAHS Plenary Administrative Session during the General Assembly of the International Union of Geodesy and Geophysics (IUGG). Change within IAHS Ltd is shaped through interactions with the IAHS Management Team and IAHS members and listening to IAHS Ltd staff. Change is delivered through allocation of IAHS Ltd resources and expenditure overseen by the trustees. 

## **Risk management** 

The trustees actively review the major risks which the charity faces on a regular basis and believe that ensuring reserves stand at more than 100% of annual direct and operating costs, combined with an annual review of the controls over key financial systems, will provide sufficient resources in the event of adverse conditions. The trustees have also examined other operational and business risks faced by the charity, including external factors, and confirm that they have established systems to mitigate the significant risks. The Chair of IAHS Ltd leads the annual update of the charity’s risk register with input from the other trustees and IAHS Ltd Executive Secretary. The IAHS Ltd risk register details the risks, the impact and probability of each, and what will be done by whom and when to manage these. 

Page 2 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

## **OBJECTIVES AND ACTIVITIES FOR THE PUBLIC BENEFIT** 

The trustees confirm that they have complied with the duty in Section 17 of the Charities Act 2011 to have due regard to public benefit guidance published by the Charity Commission. The objectives of IAHS Ltd are to advance education and research in hydrology for the public benefit and to publish the useful results of such research. A major activity continues to be the production and distribution of scientific journals. The charity supports IAHS by providing services for the membership and supporting the IAHS Bureau in its endeavours. Such endeavours also include: (1) studying the hydrological cycle on the Earth, including surface and groundwaters, snow and ice, their physical, chemical and biological processes, erosion and sedimentation, and their relationships with climate and other physical and geographical factors as well as the interrelations between them; (2) examining the hydrological aspects of the use and management of water resources, their change and their interactions with human activities to provide a firm and scientific basis for the optimal utilisation of water resources; and (3) initiating, facilitating, and coordinating research into, and investigation of, those hydrological problems which require international cooperation. 

## **ACHIEVEMENTS** 

IAHS Ltd supports the President, Secretary General and Treasurer of IAHS and the Association’s Bureau activities and manages the Association’s finances. It also maintains the Association’s website (iahs.info) which is the information hub for the Association and its 11 Commissions, maintains the IAHS membership database and sends information to members about IAHS activities and events via electronic alerts, newsletters, and social media. At the end of 2025, the number of IAHS individual members had increased to almost 12,850, of whom 52% were in financially disadvantaged countries (FDCs). Individual membership of the Association is free of charge. The 2025 IAHS Ltd Board meeting was held in February in hybrid mode. 

IAHS Ltd employs four part-time members of staff. The IAHS Ltd staff documentation, including terms and conditions, job descriptions, and appraisal and forward job plans, has been comprehensively revised and updated with support from an external HR consultant to ensure that they continue to reflect best practice and support staff. All four members of staff attended the IAHS Scientific Assembly and the _HSJ_ Editorial Retreat in Roorkee, India, in October 2025. The IAHS Ltd staff also worked together on the _HSJ_ Digest, a vehicle for promoting the IAHS journal, _HSJ_ . 

During 2023 IAHS launched the third IAHS Scientific Decade (2023-2032), named HELPING (Hydrology Engaging Local People IN one Global world). The scientific decades are a means to set the research agenda through collaborative forces. The overall aim with a scientific decade is to accumulate knowledge and streamline the efforts so that coherent engagement, sharing and focus accelerate scientific knowledge and understanding of a specific hydrological problem or phenomena. It stimulates - vivid discussions between young and senior scientists globally (https://iahs.info/Initiatives/Scientific Decades/). HELPING follows the successful scientific decades of Panta Rhei (Change) 2013–2022 and Predictions in Ungauged Basins (Predictions) 2003–2012. 

The HELPING IAHS Scientific Decade is dedicated to local solutions under the global water crisis. This decade is a bottom-up process empowered by local hydrologists and scientists using open science and local data/methods when solving local water problems. It is envisaged that the building of local knowledge and cooperation will inform scientists working under similar situations or facing unexpected events worldwide. 31 HELPING Working Groups have been established across three themes, each with a Theme Leader under the guidance of the HELPING Decade Chair. Seven HELPING-badged papers (https://iahs.info/Initiatives/Scientific-Decades/HELPING/published-papers/) were published in 2025. Examples include: Castelli et al. (2025). Co-creating water knowledge: a community perspective. _Hydrological Sciences Journal_ , 70(16), 2899-2919, 

https://doi.org/10.1080/02626667.2025.2571065 and Nlend et al. (2025). Building resilient urban water systems: emerging opportunities for solving long-lasting challenges. _Hydrological Sciences Journal_ , 70(12), 2003-2015, https://doi.org/10.1080/02626667.2025.2529267. The next annual HELPING 

Page 3 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees** 

## **For the Year Ended 31 December 2025 (Cont.)** 

Conference will be held online in January 2026 and will involve Working Group updates across all themes and discussion sessions. 

One of the main charitable activities continues to be the support of hydrologists, particularly in the early stage of their career and from financially disadvantaged countries, to attend meetings. 

In 2018, IAHS launched a new travel award, the Sivapalan Young Scientists Travel Award (SYSTA) which aims to: (1) strengthen attendance at IAHS meetings of early career hydrologists from FDC’s; and (2) foster high quality science among a new generation of hydrologists. Applications are considered from early career scientists (normally within 5 years of PhD award) who are giving a presentation at an IAHS meeting, who grew up and now reside in an FDC and are first author of a paper published in English in the Association’s journals or in another listed hydrological journal. Applications are reviewed by the IAHS SYSTA Committee. Every year funding for up to 10 awards is allocated to the scheme. The award is limited to a maximum amount per individual for covering registration fee, visa fee (if necessary), accommodation, funds for subsistence and transport. The maximum individual award amount is €3,200 and is limited to one intercontinental award per person. To reduce the financial risk in dealing with individuals, the cost of flights and meeting registration is paid directly to the suppliers. Accommodation for awardees is also booked and paid directly to the suppliers to provide benefits for interaction and support between SYSTA awardees. IAHS continues to provide comprehensive support to SYSTA applicants and awardees. For example, applicants who submit incomplete applications are given feedback and permitted to resubmit their applications. IAHS Ltd Executive Secretary administers the applications and awards, including booking flights and accommodation, arranging expenses reimbursements for the awardees, and maintaining excellent communication and support for the awardees. 

In 2025, 10 new awards were made under the SYSTA scheme and are summarised at: https://iahs.info/About-IAHS/SYSTA-Grants/2025-systa-awards/. Four additional awards for the IAHS Academy in January 2026 were also processed in 2025. 

Three awards were made to attend the 2nd International Sociohydrology Conference in Tokyo, Japan, in July 2025. 28 applications were received with applications from countries including Algeria, Bangladesh, Brazil, India, Indonesia, Nigeria, and Vietnam. Although the number of female applications remains low, two out of three awards were made to females. 

A second round of SYSTA awards was made to attend the IAHS2025 XIIth Scientific Assembly in Roorkee, India, 5–10 October 2025. 26 applications were received with eligible applications from these countries: Algeria, Benin, Cameroon, Chad, Côte d'Ivoire, Ethiopia, Ghana, India, Lesotho, Namibia, Nepal, Nigeria, South Africa, Sri Lanka, Tanzania and Togo. Seven awards were made, two to females and five to males. 

A third round of SYSTA awards was made to attend the inaugural IAHS Academy in Ningbo, China, in January 2026. 50 applications were received, and four awards were made: three to females from India, South Africa and Tunisia, and one to a male from Madagascar. Three awards made in 2024 were also transferred forward. 

IAHS established the annual Tison Award in 1982 to promote excellence in research by young hydrologists. The Award is granted to the first author and eventual eligible co-authors under 41 years of age, for an outstanding paper published by IAHS in a period of two years previous to the deadline for nominations and includes a cash prize and free subscription to _HSJ_ for a year. In 2025 the award was made to three authors from China. Two new IAHS Awards were launched in 2022, both named after women, and the first awards made in 2023. The Falkenmark Award (named after Malin Falkenmark) highlights the importance of capacity building and knowledge/data gathering in FDCs. It is awarded annually for the best PhD thesis by a candidate from a FDC who has performed the PhD work in one or more financially disadvantaged countries. The 2025 recipient was a male from Brazil. 

Page 4 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees** 

## **For the Year Ended 31 December 2025 (Cont.)** 

The Frances Watkins Memorial Award recognises her immense contribution to _Hydrological Sciences Journal_ ( _HSJ_ ) for 27 years. It is awarded annually to an _HSJ_ paper whose structure, presentation and writing are exemplary. The 2025 award was made to two authors, both male, from India. 

The ‘IAHS Digital Water Globe’ (DWG) is a web platform intended to effectively link and display global hydrological knowledge and scientific findings, and to facilitate new networking and knowledge management. After operating for several years, the current DWG is being redeveloped and will be relaunched later in 2026. 

Registered Charity Donations: In 2025 IAHS provided £1,000 to WaterNet to fund early career African hydrologists to attend the annual WaterNet/WARFSA/GWP-SA Symposium in Lusaka, Zambia, in October 2025. The donation was used to provide partial or full funding support for two female and two male early career hydrologists (MSc and PhD students, postdoctoral researchers, employees in NGOs and private companies) from Southern Africa to participate. 

A new process was launched in 2025 for allocation of funds for IAHS Regional Committees. Regional Committees applied through an application form with funding awards evaluated by the IAHS Management Team. The funding allocated to the IAHS Africa Regional Committee was used to support five African early career scientists to work in partner institutes across Africa. The mobility grants were awarded to two females (from Cameroon and South Africa) and three males (from Kenya, Senegal and Morocco) and administered directly as per the SYSTA procedures. 

## **ENVIRONMENTAL, SOCIAL AND GOVERNANCE PERFORMANCE** 

IAHS Ltd follows good practice in responding to and managing environmental, social, and governance matters. The charity aims to create a supportive environment for its staff to develop and to maintain a work-life balance. The IAHS Ltd Staff Procedures document sets out clearly the conditions of work (e.g. leave, sick pay, hybrid working entitlements) plus policies including data protection, privacy, raising concerns, dignity at work, probation, and performance review. The document is kept up-to-date to ensure compliance with UK employment laws. All IAHS Ltd staff have an annual appraisal to reflect on the past year and a forward job plan to set objectives for the next year and identify key areas of strength that the employee can continue developing as well as any training or development needs. All IAHS Ltd staff complete cybersecurity awareness and GDPR training annually. In addition, monthly staff meetings are held to share the latest developments and promote team working in an informal atmosphere. In recognition of the value of its staff, in 2024 the IAHS Ltd employer pension contributions were increased from 3% (the legal minimum) to 5%, and in 2025 an employee salary sacrifice pension scheme was introduced. 

IAHS Ltd strives for diversity in trustee and staff appointments. IAHS is committed to Equality, Diversity and Inclusion (EDI) as detailed on https://iahs.info/About-IAHS/about-iahs/ and has set up the IAHS EDI Task Force to promote it further. Membership of IAHS is free, and IAHS meetings rotate between all continents. The SYSTA scheme intensifies support for candidates from under-represented groups in the hydrological sciences, and its eligibility criteria take account of childcare responsibilities. IAHS has an established Early Career Committee and allocates funding to support new and collaborative activities of IAHS Regional Committees and Working Groups (currently for Africa, Latin America, and Pacific Island Countries & Territories). 

To minimise environmental impact and financial costs and to increase engagement and accessibility, IAHS has increasingly moved business meetings online, whilst ensuring that many scientific meetings remain in person to support networking and collaboration, particularly for early career hydrologists. IAHS Bureau meetings and Management Team meetings are held online, whilst annual IAHS Ltd Board meetings are held online in alternate years. IAHS Ltd funds and staff resources have been used to support interactive online meetings, for example purchasing Zoom large meeting licences to host the annual online HELPING conferences and supporting use of interactive online tools. 

Page 5 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

The IAHS travel expenses policy was updated in 2025 to ensure continued transparency, fairness, and accountability in the use of IAHS Ltd funds and to maximise funding for charitable activities. Public transport and economy class travel are used where possible to minimise environmental impacts and financial costs. 

## **HOW IAHS LTD IS MAKING A DIFFERENCE** 

The charity supports IAHS activities which provide benefits to IAHS members, the global hydrological scientific community, and wider society. 

In 2025, grants totalling £53,688 were made to 43 IAHS members and officers (including SYSTA) from 29 countries, with 61% of funding to males and 39% to females. Fig. 1 shows the distribution of funding amounts by countries and Fig. 2 the breakdown of the non-officer grants by funding scheme. 

Fig. 1. Percentage of award amounts in 2025 to IAHS members and officers (including SYSTA) by country. Country labels in the piechart start with Brazil at the centre top and are shown moving clockwise. 0% labels represent 0.005%. 


Fig. 2. Percentage of nonofficer award amounts in 2025 to different grant schemes. 

Page 6 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

These grants included the new funding support scheme for IAHS Regional Committees, which was used by the Africa Regional Committee as mobility grants for African early career scientists to work in partner institutes across Africa. Feedback from the grant recipients was very positive and the awards are anticipated to increase hydrological collaboration in research and learning across Africa. For example, one awardee from Stellenbosch University, South Africa, visited the Namibia University of Science and Technology to consolidate a new collaborative partnership focused on addressing flood risks to communities resulting from more frequent and intense rainfall events under a changing climate. They reported: “ _Overall, this mobility trip operationalised HELPING principles by linking local hydrological problems to global change processes, identifying context-specific solution pathways, and building institutional and community partnerships that will underpin ongoing knowledge coproduction. The visit has laid a strong foundation for continued collaboration.., and we are continuing work on the department-specific MOA to formally support this partnership_ .” 

Early career IAHS members in FDCs who are eligible can apply for the SYSTA scheme for grants to attend IAHS meetings. 2025 marked the 100th SYSTA scheme award. More than 100 applications were received from over 30 countries in 2025. Fourteen awards were made (10 for 2025 and four processed for the IAHS Academy in January 2026); 50% to females and 50% to males. The positive impact of the 2025 grants is evident from awardees’ feedback after attending IAHS meetings. 

## **Feedback from 2025 SYSTA awardees** 

“Connecting with fellow SYSTA awardees, and veterans in field deepened my appreciation for the global relevance of sociohydrology and the value of localized solutions. I left Tokyo inspired, better connected, and motivated to contribute to this evolving field.” 

“Beyond the technical sessions, what stood out most to me was the strong sense of community among participants. Conversations over coffee breaks and informal gatherings often led to meaningful exchanges about shared challenges, innovative methods, and potential collaborations.” 

“IAHS 2025 Scientific Assembly was much more than a professional event — it was a personal journey of learning, connection, and reflection. It deepened my appreciation for the global hydrological community and strengthened my motivation to continue contributing to research that supports sustainable and climate-resilient water management.” 

“Attending the XIIth IAHS Scientific Assembly was an incredibly fulfilling experience, both professionally and scientifically. The event offered a fantastic platform to present my research, connect with leading experts, and build collaborative networks for future projects. The experience... has broadened my research outlook and reinforced my dedication to advancing hydrology and climate science in Ghana, across Africa, and globally.” 

In 2025, 54 IAHS eNews items were circulated, effectively communicating with IAHS members and promoting upcoming meetings, and six editions of the new _HSJ_ Digest were published. The IAHS YouTube channel received 2,869 views and 25,915 impressions in 2025 and has 362 subscribers. 

IAHS members and the global hydrological community benefit from the charity’s publishing activities. All IAHS members in financially disadvantaged countries receive free online access to _HSJ_ and up to 80% discount on book prices. There is a reduced _HSJ_ subscription price for other members who also receive 25% discount on book prices. Many _HSJ_ articles are available free-to-view immediately after publication (e.g. featured articles, award-winning articles, opinion papers and associated discussions, Gold Open Access articles) and all articles are automatically free-to-view after two years. Supplementary materials (datasets, additional images, videos) may be linked to published papers and are free-to-view, frequently attracting more citations. 

Page 7 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

In 2025, there were more than 1 million full-text downloads of _HSJ_ articles, a significant increase from the previous two years. There was also a record number of almost 1,000 new manuscripts submitted. In 2025, 192 articles totalling 3,126 pages were published over the 16 issues of _HSJ_ Volume 70. In response to IAHS member interest, _HSJ_ continues to solicit and publish thematic collections of articles led by IAHS members. In 2025, the “History of Hydrology” collection was completed containing 25 articles. 

The Proceedings and Reports of IAHS (PIAHS) are fully open-access and available to view and download free online for all at https://iahs.info/Publications-News/Publications-News/. In 2025, PIAHS Volume 388 (https://piahs.copernicus.org/articles/388/index.html) ‘Circular Economy and Technological Innovations for Resilient Water and Sanitation Systems in Africa’ was published. 

The charity’s commitment to capacity building, international collaboration and training the next generation of hydrologists was further demonstrated in 2025 through side events targeted at early career hydrologists around the XIIth IAHS Scientific Assembly in India in October and the setting up of the first edition of the IAHS Academy, to be held in China in January 2026. The Academy is organised jointly by IAHS, UNESCO Intergovernmental Hydrological Programme (UNESCO-IHP), World Meteorological Organization (WMO), Eastern Institute of Technology Ningbo and Tsinghua University in China, and further supported by International Water Management Institute (IWMI), the Global Water Partnership (GWP) and the Partnership for Research & Innovation in the Mediterranean Area (PRIMA). 

The IAHS Scientific Decades set the research agenda worldwide through collaboration and stimulating discussions between young and senior scientists globally to accelerate scientific knowledge and understanding of a specific hydrological problem or phenomena. 2025 saw the publication of a major output from the 2nd IAHS Scientific Decade 2013–2022 as the book “Coevolution and Prediction of Coupled Human-Water Systems, A Sociohydrologic Synthesis of Change in Hydrology and Society”, available to read and download free of charge at https://www.sciencedirect.com/book/editedvolume/9780443417368/coevolution-and-prediction-of-coupled-human-water-systems. The 3rd IAHS Scientific Decade, HELPING, is actively underway, with eight papers published by the end of 2025 and engagement of more than 2,000 hydrologists in its working groups. 

The Association continues to collaborate with international agencies to inform and lead the international agenda for hydrological science research, training and solutions. The International Hydrology Prize is awarded annually by IAHS, with UNESCO and WMO, to two people who have made an outstanding contribution to hydrological science. IAHS officers and members are engaged with United Nations agencies and programmes, such as WMO, UNESCO-IHP, and the World Water Quality Alliance. In 2025, IAHS officers and members contributed to celebrations of the 50th Anniversary of the Intergovernmental Hydrological Programme and 60 years of UNESCO Water Sciences and WMO. 

## **FINANCIAL REVIEW** 

IAHS Ltd’s activities are primarily funded by royalties from publishing the _Hydrological Sciences Journal_ ( _HSJ_ ), and the annual grant from IUGG. IAHS Ltd seeks additional funding where possible from relevant organisations in particular to support training and mobility of early career scientists. Income from royalties fluctuates between years depending on journal metrics and changes in publishing models. In 2025 royalties decreased by about 6% from a high in 2024. Due to the reduced royalties income in 2025, increase in IAHS Ltd staffing to enhance communication, and increased expenditure on travel grants and the development of the DWG, the IAHS Ltd Board made a decision to reduce spending in 2025 to ensure long-term financial stability and maintenance of sufficient reserves in case of a change in income. As a result of lower expenses in 2025 there was a surplus of £21,097. The total funds at the end of 2025 stand at £545,470, as shown in the Statement of Financial Activities, comprising £532,155 as unrestricted funds and £13,315 as restricted. 

Page 8 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

The trustees have prepared the financial statements on a going concern basis. IAHS Ltd meets its day-today direct and operating costs through its reserves and income. The trustees have reviewed the charity's projected income and expenditure for 2026 and 2027. In the event that the projected total direct and operating costs (before SYSTA awards, other grants and donations) for the next 18 months may not be covered by income, there are sufficient reserves to continue to operate and fulfil obligations to staff. The major future financial risk identified by the trustees is the end of the initial term of the current _HSJ_ publishing agreement at the end of 2028. To mitigate against this risk, the publishing arrangements for _HSJ_ will be reviewed and investigated in 2027 and monitored by the IAHS Ltd Board, and a healthy reserve will be maintained. 

Unrestricted funds can be used in accordance with the objects of the charity at the discretion of the trustees. Restricted funds can only be used for particular restricted purposes within the objects of the charity when specified by the donor or when funds are raised for a particular restricted purpose. IAHS Ltd restricted funds mostly comprise funds awarded by IUGG for running the Association and by the _HSJ_ publisher for _HSJ_ Awards, Editorial Retreats and Meetings. These restricted funds are used throughout the year in supporting IAHS and _HSJ_ activities. The funding from the journal publisher for _HSJ_ Editorial Retreats is awarded every three years. The Retreat is normally held every three years although the timing was disrupted due to the COVID-19 pandemic. _HSJ_ Editorial Retreats were held in 2023 and 2025 alongside IUGG and IAHS Assemblies, respectively, and the next is planned for 2027 alongside the IUGG General Assembly in the Republic of Korea. IAHS Ltd also has a designated fund for SYSTA, representing funds set aside by the Association to make awards to early career hydrological scientists in financially disadvantaged countries for attendance at IAHS meetings. The SYSTA scheme and the awards made in 2025 are explained above, whilst future SYSTA award expenditure plans are described below. 

## **Reserves policy** 

IAHS Ltd reserves are calculated as its total unrestricted funds after deducting current liabilities and restricted funds. 

IAHS Ltd has been effective in spending down the reserves accumulated in 2020–21 during the COVID-19 pandemic to support and accelerate Association activities, in line with its charitable status. 2025 initiatives in IAHS were funded to support communication, collaboration and engagement such as the DWG and activities of the Regional Committees and IAHS Scientific Decades. Much of the reserves are held in fixed-term deposit accounts for the purpose of enabling the activities of the charitable company to continue in the event of difficulties such as staff illness, increase in suppliers’ prices, and to provide funds for exceptional purchases. The charitable company aims to maintain its reserves at approximately 100% of annual direct and operating costs as this is considered to be a suitable level. As the reserves stand at more than 100% of annual expenditure, it is planned to use some capital for travel grants and other expenditure supporting hydrologists from financially disadvantaged countries in 2026 and subsequent years, and also to support the IAHS Regional Committees and the redevelopment of the IAHS DWG. Nevertheless, the charity will continue to maintain a healthy reserve to ensure continuation of its activities in the event of reduced income from _HSJ_ from 2029 onwards after the end of the initial term of the current publishing agreement. 

## **PLANS FOR FUTURE PERIODS** 

The main activities will continue to be provision of support for IAHS community science initiatives and communications, for IAHS individual members and officers, and IAHS publishing. The new funding mechanism for IAHS Regional Committees launched in 2025 is being maintained to support and mentor the regional hydrological community through networking activities and connecting the regional hydrological community with the global stage. IAHS will continue promoting Equality, Diversity and Inclusion (EDI), led by the IAHS EDI Champion appointed in 2024. IAHS Ltd staff training and development continue, with plans to attend a suitable course on collaborative working. 

Page 9 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

With the current agreement to support the IAHS DWG ending in March 2026, IAHS has evaluated the future aims, design, functionality and operation of the DWG. A fixed-term working group led by the Chair of IAHS Ltd conducted the evaluation and presented its proposals to the IAHS Bureau in 2025. Following approval by Bureau and a competitive tendering process, a contractor has been engaged to develop the technical specification for renewing Digital Water Globe under the direction of the trustees and the IAHS Management Team. The launch of the redeveloped Digital Water Globe is anticipated later in 2026. IAHS is also reviewing its social media communications channels and strategy to ensure that communications are aligned with IAHS values and member preferences. 

The SYSTA scheme was advertised through IAHS eNews for participation in the following meetings: 

- 5th International Conference on African Rivers in Rabat, Morocco, in July 2026; 

- the ICSH-STAHY / ICGW Workshop 2026 in Victoria Falls, Zimbabwe, in July 2026; 

- the 10th International Symposium on Water Resources Management – IWRM in Canberra, Australia, in September 2026; 

- the International Commission on Continental Erosion (ICCE) Meeting in Como, Italy, in September 2026; 

- the second IAHS Academy to be held in Ningbo, China in January 2027. 

The IAHS Academy will continue to organise summer/winter short schools, training and educational programmes to advance and promote hydrological sciences globally, particularly engaging, training and valuing the next generation of hydrologists. 

Page 10 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED Report of the Trustees For the Year Ended 31 December 2025 (Cont.)** 

## **TRUSTEES’ RESPONSIBILITIES IN RELATION TO THE FINANCIAL STATEMENTS** 

The trustees (who are also directors of International Association of Hydrological Sciences Limited) are responsible for preparing the Trustees’ Annual Report and the financial statements in accordance with applicable law and United Kingdom Accounting Standards (United Kingdom Generally Accepted Accounting Practice). 

Company law requires the trustees to prepare financial statements for each financial year. Under company law the trustees must not approve the financial statements unless they are satisfied that they give a true and fair view of the state of affairs of the charitable company and of the incoming resources and application of resources, including the income and expenditure, of the charitable company for that period. In preparing these financial statements the trustees are required to: 

1. select suitable accounting policies and apply them consistently; 

2. observe the methods and principles in the Charities SORP 2019 (FRS 102); 

3. make judgements and estimates that are reasonable and prudent; 

4. state whether applicable UK Accounting Standards have been followed, subject to any material departures disclosed and explained in the financial statements; 

5. prepare the financial statements on a going concern basis unless it is inappropriate to presume that the charitable company will continue in operation. 

The trustees are responsible for keeping proper accounting records which disclose with reasonable accuracy at any time the financial position of the charitable company and to enable them to ensure that the financial statements comply with the Companies Act 2006.  They are also responsible for safeguarding the assets of the charitable company and, hence, for taking reasonable steps for the prevention and detection of fraud and other irregularities. 

This report was approved by the board of directors and trustees on 7 August 2026 and signed on its behalf by: 

Dr M Sandells Trustee 

Page 11 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Independent Examiner’s report to the Trustees of International Association of Hydrological Sciences Limited** 

I report to the charity trustees on my examination of the accounts of the company for the year ended 31 December 2025, which are set out on pages 13 to 21. 

## **Responsibilities and basis of report** 

As the charity’s trustees (and also its directors for the purposes of company law) you are responsible for the preparation of the accounts in accordance with the requirements of the Companies Act 2006 (‘the 2006 Act’). 

Having satisfied myself that the accounts of the company are not required to be audited under Part 16 of the 2006 Act and are eligible for independent examination, I report in respect of my examination of your company’s accounts carried out under section 145 of the Charities Act 2011 (‘the 2011 Act’). In carrying out my examination I have followed all the Directions given by the Charity Commission under section 145(5)(b) of the 2011 Act. 

## **Independent examiner’s statement** 

I have completed my examination. I confirm that no matters have come to my attention in connection with the examination giving me cause to believe that in any material respect: 

1. accounting records were not kept in respect of the company as required by section 386 of the 2006 Act; or 

2. the accounts do not accord with those records; or 

3. the accounts do not comply with the accounting requirements of section 396 of the 2006 Act other than any requirement that the accounts give a ‘true and fair view’ which is not a matter considered as part of an independent examination; or 

4. the accounts have not been prepared in accordance with the methods and principles of the Statement of Recommended Practice for accounting and reporting by charities applicable to charities preparing their accounts in accordance with the Financial Reporting Standard applicable in the UK and Republic of Ireland (FRS 102). 

I have no concerns and have come across no other matters in connection with the examination to which attention should be drawn in this report in order to enable a proper understanding of the accounts to be reached. 

S J Bates FCA 

Wenn Townsend Accountants Limited 10 Broad Street Abingdon Oxfordshire OX14 3LH 

Dated: 10 August 2026 

Page 12 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Statement of Financial Activities (including Income and Expenditure Account) For the Year Ended 31 December 2025** 

||**Notes**|**Unrestricted**|**Restricted**|**Total**||
|---|---|---|---|---|---|
|||||**2025**|**2024**|
|||**£**|**£**|**£**|**£**|
|**INCOME FROM:**||||||
|Grants||-|29,220|29,220|41,421|
|Donations||82|14,835|14,917|11,468|
|Book sales and page charges||474|-|474|497|
|Hydrological Sciences Journal||192,061|-|192,061|205,490|
|Sundry income||6,118|-|6,118|5,630|
|Investment income||10,684|-|10,684|12,069|
|||————|————|————|————|
|**Total income**||209,419|44,055|253,474|276,575|
|||————|————|————|————|
|**EXPENDITURE ON:**||||||
|Cost of producing publications|3|78,069|9,858|87,927|79,281|
|Charitable activities|4|9,537|63,616|73,153|76,001|
|Support and governance costs|5|71,297|-|71,297|78,971|
|||————|————|––––––––|––––––––|
|**Total expenditure**||158,903|73,474|232,377|234,253|
|||————|————|––––––––|–––––––|
|**NET INCOME (EXPENDITURE) FOR THE**||50,516|(29,419)|21,097|42,322|
|**YEAR**||||||
|Transfers between funds||(34,394)|34,394|-|-|
|Total funds brought forward||516,033|8,340|524,373|482,051|
|||————|————|––––––––|–––––––|
|**TOTAL FUNDS CARRIED FORWARD**|13/14|532,155|13,315|545,470|524,373|
|||————|————|––––––––|–––––––|



The statement of financial activities includes all gains and losses recognised in the year. 

All incoming resources and resources expended derive from continuing activities. 

**The notes on pages 16 to 21 form part of these financial statements** 

Page 13 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Statement of Financial Activities (including Income and Expenditure Account) – Previous Year For the Year Ended 31 December 2025** 

**(Comparative figures for 2024)** 

||**Notes**|**Unrestricted**|**Restricted**|**Total**|
|---|---|---|---|---|
|||||**2024**|
|||**£**|**£**|**£**|
|**INCOME FROM:**|||||
|Grants||-|41,421|41,421|
|Donations||-|11,468|11,468|
|Book sales and page charges||497|-|497|
|Hydrological Sciences Journal||205,490|-|205,490|
|Sundry income||5,630|-|5,630|
|Investment income||12,069|-|12,069|
|||————|————|————|
|**Total income**||223,686|52,889|276,575|
|||————|————|————|
|**EXPENDITURE ON:**|||||
|Cost of producing publications|3|74,496|4,785|79,281|
|Charitable activities|4|20,676|55,325|76,001|
|Support and governance costs|5|78,971|-|78,971|
|||————|————|––––––––|
|**Total expenditure**||174,143|60,110|234,253|
|||————|————|––––––––|
|**NET INCOME FOR THE YEAR**||49,543|(7,221)|42,322|
|Transfers between funds||(6,140)|6,140|-|
|Total funds brought forward||472,630|9,421|482,051|
|||————|————|––––––––|
|**TOTAL FUNDS CARRIED FORWARD**|13/14|516,033|8,340|524,373|
|||————|————|––––––––|



The statement of financial activities includes all gains and losses recognised in the year. 

All incoming resources and resources expended derive from continuing activities. 

**The notes on pages 16 to 21 form part of these financial statements** 

Page 14 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Balance Sheet at 31 December 2025** 

||||**2025**||**2024**|
|---|---|---|---|---|---|
||**Notes**|**£**|**£**|**£**|**£**|
|**FIXED ASSETS**||||||
|Tangible assets|9||504||1,432|
|**CURRENT ASSETS**||||||
|Stocks|10|3,425||4,375||
|Debtors|11|11,957||16,348||
|Cash at bank and in hand||567,301||548,466||
|||–––––––||–––––––||
|||582,683||569,189||
|**CREDITORS:**amounts falling||||||
|due within one year|12|37,717||46,248||
|||————||————||
|**NET CURRENT ASSETS**|||544,966||522,941|
||||–––––––||–––––––|
|**TOTAL ASSETS LESS**||||||
|**CURRENT LIABILITIES**|||545,470||524,373|
||||–––––––||–––––––|
|**FUNDS:**||||||
|Unrestricted funds|13||532,155||516,033|
|Restricted funds|14||13,315||8,340|
||||–––––––||–––––––|
|**TOTAL FUNDS**|||545,470||524,373|
||||–––––––||–––––––|



For the year ending 31 December 2025 the company was entitled to exemption from audit under section 477 of the Companies Act 2006 relating to small companies. 

Directors’ responsibilities: 

- The members have not required the company to obtain an audit of its accounts for the year in question in accordance with section 476; 

- The directors acknowledge their responsibilities for complying with the requirements of the Act with respect to accounting records and the preparation of accounts. 

Approved by the board of directors and trustees on 7 August 2026 and signed on its behalf by: 

........................................................... Dr M Sandells 

**Company no: 02676180** 

Page 15 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

## **1. STATEMENT OF ACCOUNTING POLICIES** 

## **Basis of preparation of accounts** 

The financial statements have been prepared under the historical cost convention and in accordance with Accounting and Reporting by Charities: Statement of Recommended Practice applicable to charities preparing their accounts in accordance with the Financial Reporting Standard applicable in the UK and Republic of Ireland issued in October 2019, the Financial Reporting Standard applicable in the United Kingdom and Republic of Ireland (FRS 102), the Companies Act 2006, the Charities Act 2011 and UK Generally Accepted Accounting Practice. 

## **Income** 

Income includes the total invoice value, excluding Value Added Tax, of book sales and page charges, and subscriptions during the year, together with grants, donations and interest received. Income from book sales and page charges is included in income in the period in which the charity is entitled to receipt. 

Royalties are included as income in the period in which the relevant journal volume is published. 

Donations and grants are included as income when they are receivable. 

Interest is included as income when it is receivable. 

## **Expenditure** 

Expenditure is included in the Statement of Financial Activities on an accruals basis, excluding Value Added Tax. 

Expenditure is attributable either to the cost of producing publications or to administration and is allocated on that basis. 

## **Depreciation of tangible fixed assets** 

Depreciation is provided at the following annual rates in order to write off each asset over its useful life: 

Plant and machinery etc 

15% reducing balance and 25% straight line 

## **Stocks** 

Stocks are stated at the lower of cost and net realisable value. 

Net realisable value is based on estimated selling price less further costs to completion and disposal. 

## **Foreign currencies** 

Transactions in foreign currencies are translated into Sterling at the rate ruling on the date of the transaction.  Exchange differences are taken into account in arriving at the movement in total funds for the year. 

## **Going concern** 

The financial statements have been prepared on a going concern basis as the trustees believe that no material uncertainties exist. The trustees have considered the level of funds held and the expected level of income and expenditure for 12 months from authorising these financial statements. 

Page 16 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

## **1. STATEMENT OF ACCOUNTING POLICIES (continued)** 

## **Fund accounting** 

## **Unrestricted general funds** 

These are funds which can be used in accordance with the objects of the charity at the discretion of the trustees. 

## **Restricted funds** 

These are funds which can only be used for particular restricted purposes within the objects of the charity. Restrictions arise when specified by the donor or when funds are raised for a particular restricted purpose. 

## **2. LEGAL STATUS OF THE CHARITY** 

The charity is a company limited by guarantee and has no share capital. The liability of each member in the event of a winding-up is limited to £1. At 31 December 2025 there were 5 members. 

|**3.**|**COST OF PRODUCING PUBLICATIONS**|**2025**|**2024**|
|---|---|---|---|
|||**£**|**£**|
||Opening stock|2,000|2,000|
||Publication production, stationery and advertising|20,117|15,227|
||Salaries|57,599|53,878|
||Office services|10,211|10,176|
||Closing stock|(2,000)|(2,000)|
|||_______|_______|
|||87,927|79,281|
|||_______|_______|
|**4.**|**CHARITABLE ACTIVITIES**|**2025**|**2024**|
|||**£**|**£**|
||Donations|11,890|15,790|
||Grants|8,325|25,576|
||IAHS officers|28,021|21,250|
||IAHS bureau|13,367|1,886|
||IAHS website|11,550|11,499|
|||_______|_______|
|||73,153|76,001|
|||_______|_______|
|**5.**|**SUPPORT AND GOVERNANCE COSTS**|**2025**|**2024**|
|||**£**|**£**|
||Salaries|61,961|54,938|
||Accountancy and legal fees|4,180|6,608|
||Bank and credit card charges|680|919|
||Sundry expenses|3,383|3,287|
||Depreciation and loss on disposal|928|1,305|
||Exchange rate (gain)/loss|(6,746)|4,288|
||Conference, travelling and workshop expenses|6,911|7,626|
|||______|______|
|||71,297|78,971|
|||______|______|



Page 17 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

## **6. NET MOVEMENT IN FUNDS FOR THE YEAR** 

This is stated after charging: 

||**2025**|**2024**|
|---|---|---|
||**£**|**£**|
|Depreciation and loss on disposal of fixed assets|928|1,305|
|Independent examiner’s fee|750|750|
||______|_______|



## **7.  TAXATION** 

There is no liability to corporation tax for the year. 

## **8. STAFF COSTS, TRUSTEE REMUNERATION AND EXPENSES, AND THE COST OF KEY MANAGEMENT PERSONNEL** 

||**2025**|**2024**|
|---|---|---|
||**£**|**£**|
|Salaries|109,580|100,444|
|Training|696|-|
|Social security costs|2,440|3,840|
|Pension costs|6,844|4,531|
||_______|______|
||119,560|108,815|
||_______|______|



The average monthly head count was 4 staff (2024: 4) and the number of full-time equivalent employees during the year was as follows: 

||**2025**|**2024**|
|---|---|---|
|Direct charitable work|1.00|1.00|
|Administrative|1.50|1.50|
||______|_______|
||2.50|2.50|
||______|_______|



No employee received remuneration in excess of £60,000 (2024: nil). Pension costs are allocated to cost of producing publications or support and governance costs in proportion to the related staffing costs incurred and are wholly charged to unrestricted funds. 

Travel, subsistence and IT expenses were reimbursed to the following trustees: K Heal £11 and J-M Kileshye Onema £10,621. 

The key management personnel is the Manager whose employee benefits total £35,580 (2024: £32,338). 

Page 18 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

## **9. TANGIBLE FIXED ASSETS** 

|**9.**|**TANGIBLE FIXED ASSETS**|||
|---|---|---|---|
||||**Plant and**|
||||**Machinery etc.**|
||||**£**|
||**Cost:**|||
||At 1 January 2025||13,407|
||Additions||-|
||||**———**|
||At 31 December 2025||13,407|
||||______|
||**Depreciation:**|||
||At 1 January 2025||11,975|
||Charge for the year||928|
||||———|
||At 31 December 2025||12,903|
||||______|
||**Net book value:**|||
||At 31 December 2025||504|
||||———|
||At 31 December 2024||1,432|
||||———|
|**10.**|**STOCKS**|||
|||**2025**|**2024**|
|||**£**|**£**|
||Books and publications|2,000|2,000|
||Silver medals|1,425|2,375|
|||______|______|
|||3,425|4,375|
|||______|______|
|**11.**|**DEBTORS**|||
|||**2025**|**2024**|
|||**£**|**£**|
||Trade debtors|10,411|24|
||Other debtors|1,546|727|
||Prepayments|-|15,597|
|||______|______|
|||11,957|16,348|
|||______|______|



Page 19 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

**12. CREDITORS:** amounts falling due within one year 

||**2025**|**2024**|
|---|---|---|
||**£**|**£**|
|Trade creditors|11,532|462|
|Taxation and social security|1,080|1,922|
|Other creditors|-|753|
|Accruals|25,105|43,111|
||______|______|
||37,717|46,248|
||______|______|



## **13. UNRESTRICTED FUNDS** 

|**UNRESTRICTED FUNDS**||||||
|---|---|---|---|---|---|
||**At 1 January**|**Incoming**|**Resources**|**Transfers**|**At 31**|
||**2025**|**resources**|**expended**||**December**|
||||||**2025**|
||**£**|**£**|**£**||**£**|
|General reserve|485,311|209,419|(150,916)|(53,062)|490,752|
|Designated fund - SYSTA|30,722|-|(7,987)|18,668|41,403|
||_______|_______|_______|_______|_______|
||516,033|209,419|(158,903)|(34,394)|532,155|
||_______|_______|_______|_______|_______|
||**At 1 January**|**Incoming**|**Resources**|**Transfers**|**At 31**|
||**2024**|**resources**|**expended**||**December**|
||||||**2024**|
||**£**|**£**|**£**||**£**|
|General reserve|447,040|223,686|(155,267)|(30,148)|485,311|
|Designated fund - SYSTA|25,590|-|(18,876)|24,008|30,722|
||_______|_______|_______|_______|_______|
||472,630|223,686|(174,143)|(6,140)|516,033|
||_______|______|_______|______|_______|



**SYSTA** – This represents funds set aside by the Association to make awards to early career hydrological scientists in financially disadvantaged countries for travel/attendance at IAHS meetings. 

Page 20 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Notes to the Financial Statements For the Year Ended 31 December 2025** 

|**14. RESTRICTED FUNDS**||||||
|---|---|---|---|---|---|
||**At 1 January**|**Incoming**|**Resources**|**Transfers**|**At 31**|
||**2025**|**resources**|**expended**||**December**|
||||||**2025**|
||**£**|**£**|**£**||**£**|
|Editorial retreat|6,144|10,000|(3,640)|-|12,504|
|IUGG subvention|-|29,220|(60,448)|31,228|-|
|Tison award|-|625|(780)|155|-|
|HSJ awards|-|1,250|(2,050)|800|-|
|Travel grants|811|-|(338)|338|811|
|Editorial board meeting|1,385|2,960|(6,218)|1,873|-|
||_______|_______|_______|_______|_______|
||8,340|44,055|(73,474)|34,394|13,315|
||_______|_______|_______|_______|_______|
||**At 1 January**|**Incoming**|**Resources**|**Transfers**|**At 31**|
||**2024**|**resources**|**expended**||**December**|
||||||**2024**|
||**£**|**£**|**£**||**£**|
|Editorial retreat|6,144|-|-|-|6,144|
|IUGG subvention|-|41,421|(45,649)|4,228|-|
|Tison award|-|625|(826)|201|-|
|HSJ awards|-|1,250|(2,150)|900|-|
|Travel grants|-|6,700|(6,700)|811|811|
|Editorial board meeting|3,277|2,893|(4,785)|-|1,385|
||_______|_______|_______|_______|_______|
||9,421|52,889|(60,110)|6,140|8,340|
||_______|_______|_______|_______|_______|



**Editorial retreat –** This represents a donation received specifically to fund an editorial retreat. 

**IUGG subvention –** This represents the annual subvention received from the IUGG for the purpose of contributing to the funding of the Association’s activities. 

**Tison award** – This represents a donation received specifically to fund an annual prize. 

**HSJ awards** – This represents donations received specifically to fund annual prizes. 

**Travel grants** – This represents a donation received specifically to support the travel costs of members from financially disadvantaged countries to attend meetings. 

**Editorial board meeting** – This represents a donation received specifically to fund an editorial board meeting and/or an annual reception for the Journal at an international conference. 

Page 21 



## **INTERNATIONAL ASSOCIATION OF HYDROLOGICAL SCIENCES LIMITED** 

## **Detailed Income and Expenditure For the Year Ended 31 December 2025** 

|||**2025**|||**2024**||
|---|---|---|---|---|---|---|
||**£**||**£**|**£**||**£**|
|**TURNOVER**|||||||
|Grants|||29,220|||41,421|
|Donations|||14,917|||11,468|
|Book sales and page charges|||474|||497|
|Hydrological Sciences Journal|||192,061|||205,490|
|Sundry income|||6,118|||5,630|
||||————|||————|
||||242,790|||264,506|
|**COST OF SALES**|||||||
|Opening stock|2,000|||2,000|||
|Printing, postage, computer consumables,|||||||
|stationery and advertising|20,117|||15,227|||
|Salaries|57,599|||53,878|||
|Office services|10,211|||10,176|||
|Closing stock|(2,000)|||(2,000)|||
||————|||————|||
||||(87,927)|||(79,281)|
||||————|||————|
||||154,863|||185,225|
|**OTHER INCOME**|||||||
|Bank interest|||10,684|||12,069|
||||————|||————|
||||165,547|||197,294|
|**CHARITABLE ACTIVITIES**|||||||
|Donations|11,890|||15,790|||
|Grants|8,325|||25,576|||
|IAHS officers|28,021|||21,250|||
|IAHS bureau|13,367|||1,886|||
|IAHS website|11,550|||11,499|||
||————|||————|||
||||(73,153)|||(76,001)|
|**ADMINISTRATIVE EXPENSES**|||||||
|Salaries|61,961|||54,938|||
|Accountancy and legal fees|4,180|||6,608|||
|Bank and credit card charges|680|||919|||
|Sundry expenses|3,383|||3,287|||
|Depreciation and loss on disposal|928|||1,305|||
|Exchange rate (gain)/loss|(6,746)|||4,288|||
|Conference, travelling and workshop|||||||
|expenses|6,911|||7,626|||
||————|||————|||
||||(71,297)|||(78,971)|
||||————|||————|
|**OPERATING SURPLUS**|||||||
|**FOR THE YEAR**|||21,097|||42,322|
||||————|||————|



Page 22