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Water Environment Informatics Lab
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A lab that reads the fate of beaches and sediment through data to prepare for climate change.
AboutAbout the lab
Foreseeing vanishing beaches through data.
The Water Environment Informatics Lab uses big data such as national land information and meteorological information to clarify how disasters cause damage.
The lab quantifies the risks of storm waves, storm surges, tsunamis, and floods, with the goal of developing technologies that reduce damage efficiently.
It treats the effects of climate-change-driven sea level rise and changing rainfall patterns on disasters, and adaptation measures against them, as especially important issues.
The lab studies how water and sediment circulate over long periods across a wide area from mountains to the sea, and how this affects people's lives.
Key terms
- Sediment dynamics
- The series of movements in which sediment produced in the mountains is carried through rivers to the sea, where it accumulates or is eroded
- Adaptation measures
- Steps taken in advance to reduce damage from the effects of climate change that cannot be avoided
- Hedonic pricing method
- A method of measuring how much value the surrounding environment has, based on differences in the prices of land or buildings
ResearchResearch themes
The lab uses big data such as national land information and meteorological information to understand the long-term circulation of water and sediment from mountains to the sea. It predicts how climate change will affect beaches and sediment movement, and uses the results to inform adaptation measures.
*Illustrative imageA long-term view of sediment flow
Sediment carried from mountains to rivers and from rivers to the sea has shaped the land over many years. Since the modern era, erosion control works, dams, and port construction have cut off the sediment supply, worsening problems of sediment deposition and erosion in rivers and along coasts. The lab analyzes big data such as nationwide land information and meteorological information to understand sediment dynamics over wide areas.
*Illustrative imageSoil eroded by heavy rain
As heavy rainfall becomes more frequent, more surface soil is eroded, which affects sediment movement from mountains to the sea. The lab is developing simulation technology that estimates this amount of erosion quickly over a wide area, aiming to help grasp disaster conditions rapidly and to assess the effects of climate change on future sediment dynamics.
*Illustrative imagePredicting a future without beaches
The lab predicts how much of Japan's sandy beaches will be lost as sea level rises. Because erosion is already advanced, some locations would lose more than 80% of their beach with a rise of only a few tens of centimeters. When a beach is lost, its functions are lost together: reducing wave energy for disaster mitigation, supporting ecosystems, and serving as a place for people to spend time.
*Illustrative imageThe tourism value of beaches
Beach resort development is thriving in Thailand, and preserving beaches has become important economically as well. The lab collected data on room rates at coastal hotels and used the hedonic pricing method to quantify how the presence or absence of a beach affects those rates. The results serve as material for considering adaptation approaches suited to each region.
MembersFaculty
The members of the Water Environment Informatics Lab consist of faculty members and doctoral students.As of 2026
- ProfessorKeiko Udo
- Assistant ProfessorGhazaleh Kheiri
- Project Assistant ProfessorSheikh Hefzul Bari
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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: “Beach of Tottori-sakyu” Kennosuke Yamaguchi from Tokyo, Japan / CC BY-SA 2.0 (cropped)
- A long-term view of sediment flow: “Rio magdalena mundung” NASA / Public domain (cropped)
- Soil eroded by heavy rain: “"Soil Erosion in Salem"” Thamizhpparithi Maari / CC BY-SA 3.0 (cropped)
- Predicting a future without beaches: “Beach Erosion ( )” Beth Knittle / CC BY-SA 2.0 (cropped)
- The tourism value of beaches: “DFC 5197 Pattaya skyline at night city lights tracing the coastline of Nong Pla Lai Bang Lamung District” PattayaPatrol / CC BY-SA 4.0 (cropped)
- Related lab (Water Environment Systems Lab): “Yoneshiro River 201911” Wc018 / CC BY-SA 4.0 (cropped)
- Related lab (Infrastructure Materials Engineering Lab): “Concrete resistance test” Habib M’henni / CC BY-SA 3.0 (cropped)
- Related lab (Disaster Geoinformatics Lab): “Mapping flood with Envisat's radar” Envisat satellite / CC BY-SA 3.0 igo (cropped)
- Related lab ([International Research Institute of Disaster Science] International Disaster Mitigation Strategy Lab): “Tacloban Typhoon Haiyan” Trocaire from Ireland / CC BY 2.0 (cropped)
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