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Disaster Prevention Hydraulic Engineering Lab
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The lab studies flood and sediment disasters through observation, experiments, and computation to reduce the damage they cause.
AboutAbout the lab
Flood disaster prevention in harmony with nature and ecosystems.
The Disaster Prevention Hydraulic Engineering Lab studies how water disasters such as floods, sediment disasters, and storm surges occur, and how to prevent or reduce the damage they cause.
By combining field observation, hydraulic model experiments, and numerical experiments, the lab examines river systems as a whole, from the upper reaches to the river mouth.
Alongside fundamental research in hydraulics and hydraulic engineering, the lab also carries out applied research on how flood protection facilities can be made compatible with the natural environment and ecosystems.
The lab is located in the Uji River Open Laboratory of the Disaster Prevention Research Institute, where experiments can be run using more than 30 facilities, including a long flume and a large-scale plane basin.
Key terms
- Hydraulic model experiment
- An experiment in which water is run through a scaled-down model of a river or bay so that the flows that would occur in reality can be observed and measured
- Kasumi levee
- A traditional flood control technique in which a levee is deliberately left discontinuous so that part of a flood overflows outward and loses force
- Scour
- The removal of soil from a riverbed or from around a structure by flowing water. If the base of a bridge pier is scoured, the bridge can be damaged
NewsLab news
Assistant Professor Takahiro Koshiba and colleagues won the Japan Society of Dam Engineers Paper Award for fiscal 2025 in two categories
A researcher won the Minister of Land, Infrastructure, Transport and Tourism Award for Outstanding Results in the River Fund for fiscal 2025
A master's student won the Outstanding Academic Presentation Award at the Kansai Civil Engineering Exchange Presentation Meeting
A master's student won the Outstanding Presentation Award at the Environmental Hydraulics Committee research meeting
ResearchResearch themes
Aiming to build a disaster prevention system that covers entire river basins from the upper reaches to the estuary, the lab studies how to prevent and reduce the damage from river disasters and sediment disasters caused by heavy rain, using field observation, fundamental and hydraulic model experiments, and numerical simulation.
*Illustrative imageCapturing flood flows in three dimensions
The lab measures flow velocity and water level in channels of various shapes, visualizes flow conditions, and also measures the shear stress acting on channel walls and the shape of the riverbed. The aim is to obtain basic data on how revetments and levees are damaged and on river channel planning that is compatible with the environment.
*Illustrative imageHydraulics of flood control by controlled overflow
Flood control methods that let part of a flood overflow, such as kasumi levees (discontinuous levees) and retarding basins, have been proposed. The lab investigates and observes the hydraulics of floods on the Katsura River (Kameoka) and the Yura River (around Fukuchiyama).
*Illustrative imageObserving how sediment moves
Even gradual sediment movement, such as sediment deposition behind sabo dams, riverbank erosion, and scour around bridge piers, can cause disasters. The lab uses observation and experiments to clarify the mechanisms, and works on modeling and prediction.
*Illustrative imageSolving complex coastal flows
Flows in coastal waters are very complex because the effects of wind, waves, density, and the Earth's rotation overlap. The lab clarifies flow fields through experiments, numerical analysis, and field observation, aiming to conserve the coastal environment and reduce coastal disasters.
MembersFaculty
The Disaster Prevention Hydraulic Engineering Lab consists of faculty, researchers, and doctoral, master's, and undergraduate students.
- ProfessorKenji Kawaike
- Project ProfessorKeiko Wada
- Assistant ProfessorTakahiro Koshiba
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: “Flood in River Bagmati” Gaurav Dhwaj Khadka / CC BY-SA 4.0 (cropped)
- Capturing flood flows in three dimensions: “Water and mud flow ( )” Oregon Department of Transportation / CC BY 2.0 (cropped)
- Hydraulics of flood control by controlled overflow: “Flood Control Levee Trail, North Windham CT” John Phelan / CC BY 4.0 (cropped)
- Observing how sediment moves: “USACE sediment retention structure Toutle River” Bill Johnson, U.S. Army Corps of Engineers / Public domain (cropped)
- Solving complex coastal flows: “Coastal Downwelling 연안 용승” Chad D. Gibson Oregon State University College of Earth, Ocean, and Atmospheric Sciences (CEOAS) / CC BY-SA 4.0 (cropped)
- Related lab (Waterfront Ground Science Lab): “Breaking waves - Sicily” Wind&Wuthering / CC BY 2.0 (cropped)
- Related lab (Erosion and Sediment Control Engineering Lab): “Debris flow lawina 4” Mirosław Mrozik / CC BY-SA 4.0 (cropped)
- Related lab (Environmental Quality Prediction Lab (Research Center for Environmental Quality Management)): “EPA GULF BREEZE LABORATORY, CHEMISTRY LAB. THE CHEMIST IS TESTING WATER SAMPLES FOR PESTICIDES - NARA - 546277” William C. Shrout / Public domain (cropped)
- Related lab (Environmental Quality Control Lab (Research Center for Environmental Quality Management)): “Algae on the River Welland in Stamford - geograph.org.uk - 6950620” Richard Humphrey / CC BY-SA 2.0 (cropped)
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