earticle

영어

In the past, rainfall was recognized as the main cause of sediment-related disasters in the Republic of Korea. However, as seen in the Gyeongju earthquake (ML 5.6) in 2016 and Pohang earthquake (ML 5.4) in 2017, the country may no longer be a safe zone from earthquakes, which are also cited as another cause of sediment-related disasters along with rainfall. Despite a high possibility of sediment-related disasters induced by earthquake in the mountainous areas, there is still a lack of the related researches and measures in the Republic of Korea. The objective of this study was to present future research direction on mountainous sediment-related disasters induced by earthquakes in the Republic of Korea, based on the precedent research extracted from the countries with seismic characteristics similar to those of Korea. Earthquakes in the Republic of Korea have lower magnitude and frequency, and occur mainly in faults inside the tectonic. These features are similar to those in China, but recent major earthquakes in the Republic of Korea may be related to those in Japan. Also, the research techniques derived from Chinese studies were overlapped with those in Japan. In the Republic of Korea with no mountainous sediment-related disaster induced by earthquake, the findings suggest necessity of the experimental studies on mechanism of sediment transportation during earthquakes and on scale of the disasters according to sequential occurrence of heavy rainfalls and earthquakes. Moreover, it would also require the studies on establishment of disaster hazard map including seismic fault information and on upgrading of the disaster hazard map that considers the spatial range of the disasters with respect to earthquake magnitude and rainfall intensity.