Abstract

낙동강은 하구의 수문 개방 시 연간 수천 톤의 쓰레기가 남해로 유입되어 인근 연안을 이동하며 사회 경제적 피해를 유발하고 있다. 이에 본 연구에서 낙동강 유출 부유쓰레기의 거동 특성을 파악하기 위해 2012년 장마, 태풍 내습 시를 대상으로 피해지로 추정되는 거제도 북동측 해안 1개소에 대한 조사와 부이를 활용한 이동 경로 추적 시험을 수행하였다. 또한, 해양기상 환경에 대한 분석을 통해 부유쓰레기의 이동과 관련된 흐름을 파악하였다. 연구 결과 장마 시기인 7월 16일 초목류를 비롯한 총 40톤 정도의 쓰레기가 흥남해수욕장으로 유입되었다. 또한 9월 14일 태풍 '산바' 내습 시기에 투하된 위치 추적 부이는 가덕도 남쪽 해상을 지나 1 ~ 2일 후 거제도 해안가로 유입되는 결과를 보여주었다. 부유쓰레기와 위치 추적 부이가 거제도 북동측 해안가로 유입될 당시 거제 해역에서 북동풍계열의 풍향이 지배적이었으며 연안으로 유입되는 공통적인 해수 표층 흐름이 나타났다. When the mouth of the Nakdong River, opens its floodgate, thousands of tons of litter should flown into the South Sea, moving towards nearby coast, thus causing serious social and economic damage. For this reason, in the present study, research was performed on one certain area in northeast coast of Geoje island, which is assumed as area damaged due to rainy season and typhoon in 2012, and research for trace of movement route was implemented by using buoy to identify characteristic of movement of floating debris caused from Nakdong River. Flows related to the movement of floating debris was also identified by analyzing ocean meteorological environment. As a result of the study, total 40 tons of litter composed of grasses and trees(or plants litter) were flown into Heungnam beach on 16th, Jul which is the rainy season. Plus, the location tracking buoy, which was dropped when the typhoon SANBA was coming, was passed by southern sea of Gadeok-do and was flown into Geoje beach 1 ~ 2 days after it was dropped. The wind direction was mostly northeasterly wind around the Geoje beach at the time the buoy and floating debris were flown into northeast coast and there was common sea surface currents which was flowing into the coast.

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