Seismic intensity deduced from instrumental data has been evaluated using the empirical relationship between intensity and peak ground acceleration (PGA) during an earthquake. The Japan Meteorological Agency (JMA) developed a seismic intensity meter, which can estimate the real-time seismic intensity from seismic motions observed at a local site to evaluate the damage during the earthquake more correctly. This paper proposes a practical application of the JMA intensity to dams during the 2013 earthquake in Yeongcheon, Korea. In the present paper, seismic intensity was estimated from the relationships between accelerations observed at Yeongcheon Dam. Estimated seismic intensities were in the range of 0 to 3, which was verified from the displacements of dams and the variation of the ground water level observed at Yeongcheon dam during the earthquake. The JMA intensity, which is determined by considering the frequency, duration of cyclic loading, etc., was 0 (zero) and there was no damage to Yeoncheon dam during the earthquake.

A state-of-the-art safety management system of water infrastructures based on ICT Technology is now under development by incorporating 1) real-time safety evaluation system, 2) disaster risk management support system based on GIS, and 3) decision-making support system for damage restoration equipped with multi sensor information acquisition system such as UAV and CCTV. This study includes development of practical natural disaster scenarios for flooding, typhoon and earthquake events based on recorded data, and standardization of disaster management platform.

In this study, in order to measure the seepage through dam body and foundation, we conduct geophysical survey such as electromagnetic survey in A dam that has not been measured quantitative seepage. Therefore we will analyze the reasons and establish the improvement.

Recently, assessment of vulnerability of existing dam structures is a rising key issue in aspects of entire life year from design, construction to maintenance even in Korea due to more frequent earthquakes and effects of climate change. This study aims to develop a vulnerability assessment method for existing dam structures by using fragility analysis method based on 2-D FEM analyses, which can take into consideration various uncertainty information to dam structure safety assessment, and which may be incorporated into an integrated safety management platform under development by K-water.

In this study, in order to enhance the quality of concrete dam it is mentioned that the influenced factors which effect on the water leak and methodology for weak zone survey before filling water of concrete dam.