Journal of the Korean Geographical Society ISSN:1225-6633(Print) 대한지리학회지

The number of marine accidents in Korea has been increased over decades. The purpose of this study is to find consecutive hotspot of ship grounding accidents, to discover the main geomorphological factor of the ship grounding accidents and create a ship grounding susceptibility map of the Tongyeong sea area. In order to achieve this goal, the consecutive hotspot was found by space time cube analysis by using the marine accidents data. Then, the factors of the ship grounding accidents were analyzed by decision tree method and the ship grounding susceptibility map was created based on the frequency ratio between the ship grounding data and the factors. The result of the study is that firstly, the Tongyeong sea area has been identified as consecutive hotspot. Secondly, a probability of ship grounding accident was 52.8% when there are rock and reef; the vessel type is fishing boat. Finally, the high susceptible area was where the water depth was shallower than 8.68m; sea surface feature was a channel; the number of rock and reef was more than 5; the sand ridge, wreck and obstacle existed.