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Watershed Management Lab
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The lab studies the mechanisms of sediment disasters and observes watersheds from satellites.
AboutAbout the lab
Understanding watersheds through erosion control and satellites
The Watershed Management Lab studies sediment disasters, water resources, and forest issues, using the watershed, where water, terrain, vegetation, and people interact, as its unit of analysis.
The lab analyzes sediment movement in the headwaters of watersheds, and the disasters it causes, using physical models, observation, and experiments.
It then takes a broad view of these results through satellite remote sensing and ecological models, working to solve these problems.
The lab is divided into an Erosion Control (Sabo) Group and a Remote Sensing Group, and also conducts field surveys.
Key terms
- Watershed
- The smallest unit of a system in which water, terrain, vegetation, and people interact in complex ways.
- Erosion control (sabo)
- A field that works to clarify the mechanisms of sediment disasters in watersheds and to develop disaster prevention technologies.
- Remote sensing
- A method of analyzing data acquired by satellites to study vegetation and changes in land cover and land use.
NewsLab news
A paper by Project Assistant Professor Takafumi Hajika and colleagues is published in Journal of Hydrology
A paper by a lab graduate and Professor Taro Uchida and colleagues is published in the Journal of the Japan Society of Erosion Control Engineering
A paper by Assistant Professor Yosuke Yamakawa and colleagues is published in CATENA
A paper co-authored by Professor Taro Uchida wins the Technology Award of the Japan Society of Erosion Control Engineering
Project Assistant Professor Takafumi Hajika wins an Outstanding Presentation Award at the research conference of the Japan Society of Erosion Control Engineering
ResearchResearch themes
The lab works to clarify the mechanisms of sediment disasters in watersheds and to develop disaster prevention technologies, and it analyzes water resources, forest resources, and human activity using satellite data. Its research falls broadly into two areas: erosion control (sabo), which addresses sediment disasters, and remote sensing, which uses satellite data.
*Illustrative imageNationwide land use map distinguishing orchards
This work addresses the lack of orchard information in JAXA's high-resolution land use and land cover maps. The lab expanded the existing 15 categories to 27 and produced a map of all of Japan that includes orchards by tree species.
*Illustrative imageLand use and land cover map of western Indonesia
The lab is creating a land use and land cover map specific to western Indonesia and its surrounding area, using machine learning and satellite imagery.
*Illustrative imageEstimating soil moisture in Tsukuba from satellite data
Using data from PALSAR-2 aboard ALOS-2, the lab estimates soil moisture for bare land in Tsukuba and creates spatial distribution maps.
*Illustrative imageDeveloping a land use and land cover map of the Kanto region
Using machine learning, the lab is creating a high-resolution land use and land cover map of the Kanto region for agriculture and ecosystem conservation.
MembersFaculty
The Watershed Management Lab consists of faculty members, researchers, and doctoral, master's, and undergraduate students, including international students and working-professional students.As of 2026
- ProfessorTaro Uchida
- Associate ProfessorKenlo nasahara
- Assistant ProfessorYosuke Yamakawa
- Project Assistant ProfessorTakafumi Hajika
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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: “Wet Winter in the Mississippi River Basin (MODIS )” MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
- Nationwide land use map distinguishing orchards: “Island of Hawai'i - Landsat mosaic” Hawaii Land Cover Analysis project, NOAA Coastal Services Center / Public domain (cropped)
- Land use and land cover map of western Indonesia: “Rice terraces BOGOR” Blue tooth7 / CC BY-SA 3.0 (cropped)
- Estimating soil moisture in Tsukuba from satellite data: “ICEYE SAR satellite Netherlands” Defensie Nederland / CC BY-SA 4.0 (cropped)
- Developing a land use and land cover map of the Kanto region: “Satellite image of Japan in April 2018” Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
- Related lab (Sustainable Resource Management Lab): “Waste Recycling Facility - geograph.org.uk - 290823” David Wright / CC BY-SA 2.0 (cropped)
- Related lab (Environmental Colloid and Interface Engineering Lab): “Jardine Water Purification Plant 2022” Sea Cow / CC BY-SA 4.0 (cropped)
- Related lab (Aquatic Environment Ecological Engineering Lab): “Lake water uptake” Ahom04 / CC BY-SA 4.0 (cropped)
- Related lab (Forest Policy Lab): “Collaborative Forest Landscape Restoration Program (CFLRP) - New Mexico ( )” Forest Service Photography / Public domain (cropped)
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