The Environment Agency published its Reservoir Safety Research Strategy 2026 on 4 September 2026, setting out the research areas it considers most important for strengthening reservoir safety management in the years ahead.
The document does not introduce new legal duties, commit the Environment Agency to fund individual projects, or change the current regulatory requirements for reservoir owners. Instead, it is a strategic framework intended to direct future research, support collaboration and improve the evidence used in regulation, engineering decisions and long-term asset management.
For reservoir undertakers, panel engineers, water companies, local authorities, landowners and organisations promoting development near impounded water bodies, the strategy is a useful indication of where professional expectations, guidance and regulatory reform may increasingly focus.
What has changed?
The 2026 strategy replaces the previous research agenda and reframes reservoir safety around eight connected themes: climate change; engineering; environmental, social and sustainability considerations; smart monitoring and artificial intelligence; regulation and guidance; reliability and resilience; resources, relationships and communication; and risk assessment.
Its emphasis is notably broader than traditional dam inspection and repair. It links structural safety with ageing infrastructure, changing rainfall patterns, drought, land-use change, downstream development, operational pressures and the need for better data. The Environment Agency describes surveillance, monitoring, risk understanding and performance understanding as the principles running through the entire strategy.
The evidence base identifies older impounding and embankment dams as a particular concern. It also highlights internal erosion as a recurring failure mechanism in reported incidents, reinforcing the importance of effective inspection, seepage assessment, condition data and timely remedial work.
Climate change moves from background risk to design and operational issue
Climate change is presented as a risk multiplier rather than a standalone issue. The strategy identifies unresolved questions around how changing rainfall intensity, storm sequencing, catchment response, drought and temperature extremes should be reflected in reservoir safety decisions.
In practical terms, this points to a growing need for owners and advisers to keep hydrological assumptions, spillway capacity, drawdown arrangements and emergency planning under review. It also supports a more joined-up approach between reservoir safety assessments and wider flood-risk, drainage, water-resources and climate-adaptation work.
The strategy does not prescribe a new climate-change allowance or require immediate reassessment of every reservoir. However, it signals that research into probable maximum precipitation and probable maximum flood estimation, overtopping, inflows and uncertainty is likely to remain important as future guidance and methodologies are developed.
Smart monitoring and AI: support for judgement, not a replacement for it
One of the clearest developments is the dedicated focus on smart monitoring and artificial intelligence. The Environment Agency sees potential for remote sensing, telemetry, connected sensors, geophysics and data analytics to improve routine surveillance and identify abnormal trends earlier.
Crucially, the strategy is measured about this opportunity. It identifies questions over reliability, assurance, explainability, cyber security and governance in safety-critical applications. Its stated direction is that technology should strengthen, rather than replace, professional judgement.
Asset owners considering instrumentation upgrades should therefore avoid treating technology as a simple compliance solution. A proportionate monitoring plan should address the specific failure modes and operational risks at a site, define data ownership and quality controls, set escalation thresholds, and establish how findings will be reviewed by competent people. Monitoring records should complement, not displace, statutory inspections and established maintenance arrangements.
Who should take notice?
- Reservoir owners and operators: particularly those responsible for older embankments, flood-storage assets or non-operational reservoirs, should consider whether their asset information, inspection history and monitoring arrangements provide a sufficiently clear picture of condition and resilience.
- Panel and civil engineers: the agenda points towards future work on deterioration, residual life, erosion, drawdown, breach modelling, geophysics and proportionate risk assessment.
- Developers and planning teams: projects downstream of reservoirs, or proposals affecting catchments, access, operational infrastructure or emergency routes, should recognise that reservoir risk and downstream consequences may require early engagement with relevant owners and regulators.
- Water-resource, energy and agricultural interests: the strategy supports further research into reoperation, repurposing and potential new uses of reservoirs, while retaining safety and environmental considerations at the centre of decision-making.
- Local authorities and emergency planners: potential future guidance on emergency-plan testing, flood retention reservoirs and incident response may be relevant where communities or critical infrastructure lie within inundation areas.
Relationship with reservoir safety reform
The research strategy sits alongside, rather than replaces, the wider Reservoir Safety Reform Programme being progressed by government, the Environment Agency and partners. That programme is considering changes over several years, including a more risk-based regime and proposals associated with hazard classification and reservoir safety management.
It is important not to conflate the two. The research strategy is a statement of priorities for evidence and collaboration. It is not a consultation on regulatory change and does not itself amend the Reservoirs Act 1975 or associated requirements. Any future legal or procedural changes will need to follow the relevant policy, consultation and legislative processes.
Current requirements remain applicable. In England, large raised reservoirs are generally those capable of holding more than 25,000 cubic metres of water above natural ground level, with further duties depending on risk designation and circumstances. Owners should continue to follow existing Environment Agency and Defra guidance, including requirements concerning registration, appointment of engineers, flood planning, inspections and incident reporting where relevant.
Recommended next steps
- Review the strategy against existing asset-management and capital-maintenance plans, especially where assets are ageing or have known uncertainty around seepage, erosion, spillway performance or mechanical equipment.
- Assess whether current monitoring is targeted at credible failure mechanisms and whether data can be interpreted, assured and acted upon effectively.
- Build climate resilience into proportionate reservoir reviews, including catchment conditions, extreme-event assumptions, operational dependencies and emergency arrangements.
- For development sites, identify reservoir-related flood constraints and operational interfaces early in site due diligence and masterplanning.
- Monitor the separate Reservoir Safety Reform Programme for consultations, guidance and implementation announcements; do not assume that research priorities are already enforceable requirements.
The main message is clear: the Environment Agency expects the sector to build a stronger, more usable evidence base for managing reservoirs under changing climatic, technological and infrastructure conditions. Organisations that improve their records, risk understanding and monitoring governance now will be better placed to respond as research is translated into future practice and policy.