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Regional Hydroclimate Lab
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A lab that simulates regional water cycles under climate change.
AboutAbout the lab
Understanding regional water and atmosphere in an era of changing climate.
The Regional Hydroclimate Lab studies regional hydroclimate systems, building on hydraulic engineering, meteorology and climatology, and statistical mathematics.
Amid climate change and socioeconomic changes such as population decline, the lab aims to support decisions and actions that contribute to a decarbonized society and to improved regional sustainability and resilience.
The lab is motivated by the problem that conventional disaster prevention plans and measures are based on risk assessments that assume the climate does not change, and that these approaches are becoming inadequate.
Key terms
- Downscaling
- A method for obtaining regional-scale climate information from large-scale climate model results. There are dynamical and statistical approaches.
- Hazard and risk
- Dangerous natural phenomena such as floods and storms (hazards), and the likelihood of the damage they cause (risk).
- Resilience
- The ability to limit damage and recover from disasters or environmental change.
NewsLab news
A student received the Outstanding Student Presentation Award at the JpGU-AGU Joint Meeting 2026
A lab presentation received the Best Industrial Application Award at SAT Technology Showcase 2026
Associate Professor Koji Dairaku received the International Activity Encouragement Award from the Japan Society of Civil Engineers
A lab presentation received the Best Poster Award at the Scientific Forum
A lab paper received the Best Paper Award at EMCEI 2024
ResearchResearch themes
When climate change alters the global water cycle, it has major effects on many social and economic activities. Through simulations of the atmospheric and terrestrial water cycle and other methods, the lab studies regional hydroclimate systems.
*Illustrative imageWater Cycle Simulation and Impact Assessment
The lab simulates the water cycle through the atmosphere and land at multiple scales. Its work also covers dynamical and statistical downscaling, impact assessment, and evaluation of renewable energy.
*Illustrative imageWind and Flood Disaster Risk Information and Probabilistic Assessment
For climate change adaptation, the lab develops hazard and risk information on wind and flood disasters, as well as regional climate simulation techniques. It also develops methods for probabilistically evaluating large-scale multi-model simulation information.
MembersFaculty
- Associate ProfessorKoji Dairaku
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Cycle de l'eau” toony / CC BY 3.0 (cropped)
- Water Cycle Simulation and Impact Assessment: “Rain over Beinn Eich, Luss Hills, Scotland” Michal Klajban / CC BY-SA 4.0 (cropped)
- Wind and Flood Disaster Risk Information and Probabilistic Assessment: “Torrential rain suddenly” Pauloleong2002 / CC BY-SA 4.0 (cropped)
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