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조석우세환경인 경기만에 발달된 수중사구의 형태·퇴적학적 변화

Morphological and sedimentological changes of subaqueous dunes in the tide-dominated environment, Gyeonggi Bay

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참고문헌

키워드

주제분류기계공학

초록

경기만 남부 지역에 발달되어 있는 수중사구의 형태 특성 및 변화를 알아보고 수중사구의 발달제어요인을 파악하기 위해서 2004년 9월과 2006년 9월에 고해상도 다중빔음향측심기를 이용한 지형조사와 퇴적학적 조사를 실시하였다. 연구지역은 현재의 조류세기와 퇴적물 특성이 대형 수중사구가 충분히발달, 유지될 수 있는 조건을 나타내고 있다. 시간에 따른 퇴적물 특성 변화, 즉, 입도의 감소는 초대형수중사구의 파고를 감소시키고 있어, 입도가 연구지역 내 수중사구 크기 발달에 영향을 미치는 주요 요인임을 나타낸다.

Abstract

In september 2004 and 2006, topographical and sedimentological survey were carried out using multibeamechosounder, which were to investigate shape characteristics, temporal changes and control factors ofthe subaqueous dunes in the southern Gyeonggi Bay. The present tidal current and sedimentary characteristicsof study area make conditions that the sizes (length and height) of large subaqueous dunes are developed andmaintained sufficiently. The change of sedimentary characteristics over time, the decrease in grain size causesreduction in the height of very large subaqueous dunes. Therefore it shows that the grain size of surface sedimentsis a primary control factor in defining subaqueous dune sizes in the study area.

참고문헌 (27)

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