OSL 연대측정과 탄성파 탐사를 이용한 정선 조양강 일대 구하도 형성과정 추정 = Timing and Process of Abondoned Channel Formation Using OSL Dating and Seismic Survey in Jeongseon, Korea

다국어 초록 (Multilingual Abstract)

There are many studies about fluvial terrace in Korea, but only a few researches carried on abandoned channel. Jeongseon-Gun, the study area, has plenty of abandoned channel due to development of meandering streams. We aim to understand the formation age and process of abandoned channel, comparing with nearby fluvial terrace. OSL dating and seismic survey were carried out. As a result, fluvial terrace consisted of a total of 10 terraces and incision rate was calculated to be 0.235m/ka. Meander cutoff occurred 166.62~97.80ka at two abandoned channel in study area. This period was the transition from the glacial period to interglacial period, and erosion due to increased discharge affected to cutoff.