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Erosion and Sediment Control Engineering Lab
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The lab tracks the movement of sediment from mountains to the sea in order to prevent sediment-related disasters.
AboutAbout the lab
Building a healthy sediment environment in river basins
The Erosion and Sediment Control Engineering Lab investigates how sediment moves through the sediment transport system from mountains to the sea, aiming to prevent and mitigate sediment-related disasters.
Erosion and sediment control engineering is a discipline spanning broad fields, including sediment hydraulics, hydrology, geomorphology, geology, and ecology.
Built on the two pillars of "disaster prevention" and "the environment," the lab studies how to capture and control sediment erosion, deposition, and runoff.
Combining observation, hydraulic experiments, and numerical analysis, the lab develops technologies to maintain a healthy sediment environment in river basins.
Key terms
- Debris flow
- A phenomenon in which sediment accumulated on mountain slopes and in valleys mixes with water and rushes downstream all at once
- Sediment transport system
- The continuous flow in which sediment generated in mountains is carried through rivers to the sea
- Sediment production
- The new generation of sediment supplied to rivers as rock and soil collapse on mountain slopes. The lab works on observing and predicting its amount
NewsLab news
Doctoral and master's students, among others, received the Young Researcher Excellent Presentation Award at the Japan Society of Erosion Control Engineering Mie Conference
A doctoral student received the Paper Encouragement Award of the Japan Society of Erosion Control Engineering Award for fiscal 2026 (Reiwa 8)
ResearchResearch themes
The lab studies sediment movement in the sediment transport system, as well as the mechanisms of sediment-related disasters and measures to prevent and mitigate them, combining observation, hydraulic experiments, and numerical analysis. It aims to establish methods for creating healthy river basins in terms of both safety and the environment.
*Illustrative imageUncovering the mechanisms of debris flows
Debris flows cause enormous damage, and the mechanisms of their flow are not fully understood. The lab observes in the field the content of fine sediment, which governs fluidity, aiming to clarify their behavior and improve models.
*Illustrative imagePresenting hazard maps probabilistically
The lab estimates the probability of debris flow initiation at each point from rainfall and topography, and develops a method that expresses the extent of damage as arrival probability by repeating many simulations.
*Illustrative imageImpact of climate change on sediment-related disasters
By feeding heavy-rainfall data from regional climate models into simulations that integrate sediment production and sediment runoff, the lab shows that floods and sediment production of a scale not seen in the present climate could occur.
*Illustrative imageMeasuring the amount of sediment generated on high mountains
In high-elevation mountains, sediment breaks off as the surface of bare bedrock freezes and thaws. In collaboration with the Hotaka Sabo Observatory in Gifu Prefecture, the lab observes this phenomenon using time-lapse cameras.
MembersFaculty
The members of the Erosion and Sediment Control Engineering Lab consist of faculty, researchers, administrative staff, visiting researchers, and doctoral, master's, and undergraduate students.
- ProfessorKana Nakatani
- Associate ProfessorKazuki Yamanoi
- Associate ProfessorShoki Takayama
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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: “Debris flow lawina 4” Mirosław Mrozik / CC BY-SA 4.0 (cropped)
- Uncovering the mechanisms of debris flows: “A heavy gauge metal barrier protects Forest Road 263 and the canyon west of Montezuma, New Mexico. The barriers were added to protect against flood and debris damage following the Hermit Peak Calf Canyon wildfires” Matthew.kowal / CC BY-SA 4.0 (cropped)
- Presenting hazard maps probabilistically: “27 Lahar Hazard Zones—Pierce County 16-9 ratio, 7200x4050 pixels” Washington State Department of Natural Resources / CC BY-SA 2.0 (cropped)
- Impact of climate change on sediment-related disasters: “Heavy rain disaster in Hiroshima” melvil / CC BY-SA 4.0 (cropped)
- Measuring the amount of sediment generated on high mountains: “Erosion in Rocky Mountain National Park” USFWS Mountain-Prairie / Public domain (cropped)
- Related lab (環境質予見 (流域圏総合環境質研究センター)): “EPA GULF BREEZE LABORATORY, CHEMISTRY LAB. THE CHEMIST IS TESTING WATER SAMPLES FOR PESTICIDES - NARA - 546277” William C. Shrout / Public domain (cropped)
- Related lab (防災水工学): “Flood in River Bagmati” Gaurav Dhwaj Khadka / CC BY-SA 4.0 (cropped)
- Related lab (水理環境ダイナミクス): “Kruger National Park (ZA), Sand River” Dietmar Rabich / CC BY-SA 4.0 (cropped)
- Related lab (
空間情報学): “Minsk city (Belarus), Sentinel-2 satellite image” European Space Agency / CC BY-SA 3.0 igo (cropped)
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