Climate Impacts of Reservoir-Induced Precipitation Changes
Summary
Large reservoirs alter the hydrological cycle by increasing surface water area, modifying local energy budgets and changing atmospheric moisture fluxes. The impoundment of water behind dams enhances evaporation and can locally humidify the boundary layer, leading to shifts in rainfall intensity, distribution and timing. Downwind of major storage projects, enhanced moisture transport may stimulate convective rainfall, while in some regions the stabilising effect of increased latent heat flux dampens local extreme events. The magnitude and direction of these changes depend on reservoir size, regional climate regime and seasonal operation schedules. In tropical and subtropical settings, newly created water surfaces often drive a measurable increase in convective precipitation, whereas in temperate zones the effects may be masked by synoptic variability. At the basin scale, cumulative storage capacity can modify river flows by altering upstream–downstream moisture budgets and feedbacks between evaporation, atmospheric circulation and orography. Understanding these interactions is essential for anticipating reservoir contributions to flood risk, water security and regional climate adaptation under a changing global climate.
Research from Nature Portfolio
No recent Nature Portfolio content available.
Climate Impacts of Reservoir-Induced Precipitation Changes publication trend
The graph below shows the total number of articles in climate impacts of reservoir-induced precipitation changes across all publications each year (not limited to Nature Index journals).
Technical terms
Reservoir impoundment: The process of storing water behind a dam, creating an artificial lake that alters local water and energy fluxes.
Moisture recycling: The fraction of precipitation generated by evaporation and transpiration within the same region, contributing to local rainfall.
Precipitation anomaly: The deviation of observed rainfall from a long‐term average, used to assess changes before and after reservoir creation.
Reservoir characteristic factors (RCFs): Physical attributes of a reservoir—such as surface area, depth and storage capacity—that influence its climatic impact.
References
- Impacts of dams and reservoirs on local climate change: a global perspective. Environmental Research Letters (2021).
- Contribution of moisture sources to precipitation changes in the Three Gorges Reservoir Region. Hydrology and Earth System Sciences (2021).
- Precipitation Changes in the Three Gorges Reservoir Area and the Relationship with Water Level Change. Sensors (2021).
Turn complex research questions into confident strategic decisions
When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.
Benchmark your performance against global peers using robust, methodologically sound analysis.
Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.
Gain tailored, decision-ready recommendations aligned to your strategic priorities.
Talk to us to learn more about our data dashboards and bespoke strategy reports.
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.
Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:
Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.
Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.
Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.
Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.