Bosai Solution ID : JBP00071

Land Subsidence and Deformation Monitoring Service forSocial Infrastructure
Detecting Dangerous Spots in Social Infrastructure in their early stages.
Contributing to Ensure a Safe, Secure and Robust Society

HazardEarthquake Land Slide

Solution Purpose
Prevention & Mitigation Recovery

Solution Theme
Research & Investigation Risk Assessment Disaster Prevention Plan Infrastructure Technology Building
Technology Information & Communication Technology

Technology Subject
Technical Research & Development Feasibility Study Risk Monitoring Impact & Damage Simulation
Mitigation Plan Business Continuity Plan Road Railways Airport Essential Utilities Urban Design &Construction of Resilient Building Information Gathering Information Analysis & Judgement＜ Downloaded from www.bosai-jp.org ＞

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Advantages
Satellites RADAR data is used in order to monitor extensive infrastructure networks. By analyzing RADAR
data from past to present, land deformation to be detected on a scale of several centimeters annually. Ifa certain area is found to have experiences of significant land deformation, it can be assumed that local
buildings and infrastructure are at risk. Furthermore, it leads to screening for investigation in detail anddecision-making.

Solution Illustrated

BackgroundSocial infrastructure such as railroads, roads, levees, dams as well as water, gas and power facilities
extend their networks across the entire country, covering long distances. This means they are difficult toreplace with new systems once they have been laid down. They are deteriorating as they age year byyear and are in danger of falling apart as the result of earthquakes and land subsidence. Throughmonitoring facilities and locations, early detecting risk areas and maintenance of them, the original
strength of the social infrastructure can be sustainable. However, lots of time and cost are required due
to monitor and inspection manually by professionals in wide area. It is the issue to establish efficientmonitoring system.

Exposition of the Solution
Inspections are currently carried out in vehicles, manually by professionals, or based on reports fromlocal residents. This requires a lot of time and money. Early detection of damage or risk areas requires
streamlining the monitoring system. Using satellites allows extensive infrastructure networks to becovered all at once. Furthermore, using a Synthetic Aperture Radar (SAR) allows land deformation to bedetected on a scale of several millimeters to several centimeters annually. For example, if a certain area
is found to have experiences land deformation, it can be assumed that local buildings and infrastructure
are at risk. Based on such assumptions, decisions can be quickly made to dispatch engineers to inspect
the site. Moreover, the use of a high resolution satellite will allow deformation in the buildings
themselves to be detected. For example, in the case of bridges, deformation due to heat can bemonitored on a scale of millimeters to detect damage before any breakdown occurs. RESTEC is the onlyorganization in Japan possessing this technology.
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Land deformation is a problem that also affects artificial ground. It can also affect landfill sites for rubble
left over from earthquakes, which there will no doubt be more of in the future. This problem is also
expected to occur in developing countries where social infrastructure is currently under construction.
Our aim is to engage in active research and development, and examine ways of creating a new service
that can be put into practical use in Japan first, to contribute to establishing a safe, secure and robustsocial infrastructure. After accomplishing this, we hope to expand our service overseas.

Achievements of Examples
There were many examples of analysis for ground deformation of domestic and abroad area in projectand joint research. For the purpose of the facility inspection and land risk judgment material, we arepreparing for providing information as standard service for enterprise.

Corporate Profile
Remote Sensing Technology Center of JapanTOKYU REIT Toranomon Building 2F 3-17-1 Toranomon, Minato – ku, Tokyo 105 – 0001, Japan Tel. : +81-3-6435-6700
 E-mail : R-JBP@restec.or.jp
 Website : https://www.restec.or.jp/en/＜ Downloaded from www.bosai-jp.org ＞

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