23 Dams, South Korea
23 Dams, South Korea
GeoSIG Old Case Studies

Dam Seismic Monitoring Instrumenation Network for 23 Dams in South Korea





Since the dynamic behaviour of dams under severe earthquake motion is not known satisfactorily, data from strong motion instruments can form the basis for a more reliable seismic assessment of the existing and future dams.

GeoSIG has maintained a strong presence around the world in the form of dam monitoring solutions.

Established in 1967, Korea Water Resources Corporation (K Water) has been implementing national water resources management policies regarding multipurpose dams, water supply dams and regional water supply systems in Korea. For the crisis management of dam facilities at the time of an earthquake, K-water has completed the installation of seismic equipment for all 32 dams in 2008, majority of which are GeoSIG instruments. K-water developed the DEMS (Dam Earthquake Monitoring System) in 2006 to integrate and operate all seismic devices, and in addition, for the safe management of dams. K-water structured the DIIS (Dam Integrated Information System) to facilitate in maintenance and management works for the facilities. 

The scope of the comprehensive 23 dams project required instrumentation to record seismic motions and other ambient dynamic activity in order to continuously monitor dam structural safety within the context of a safe operating dam environment. 

The project was executed in close cooperation with our local partner EJtech Co. Ltd. (www.ejtech.net).

Once the data has been processed it is assessed and compared as dam behaviour against seismic design criteria applicable to dam operations. The project facilitated the development and improvement of dam emergency and safety measuring equipment within the context of increased awareness and contributed to the regional seismic data management systems.

Summary of systems table of the  monitoring solution in South Korea





Seismic Recorders


Central Processing System Centre 

Processing And Reporting Software Solution 

The K Water DEMS is an optimized system structured by collecting the seismic data from each dam on exclusive cable connection for real time earthquake sensing and prompt earthquake notice for wavelength data collection and monitoring, maximum acceleration analysis and expression. When an earthquake occurs (0.01g or more), the personnel in charge of dams nationwide are notified with the earthquake warning SMS to set the action plan by checking the damages to the dam after the earthquake and undertaking emergency inspections.


This area can be used for a final sales message.