Journal of Advanced Marine Engineering and Technology

  • 제40권1호
  • /
  • Pages.69-74
  • /
  • 2016
  • /
  • 2234-7925(pISSN)
  • /
  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
권호 표지
DOI QR코드

DOI QR Code

낙동강 하구역 진우도 남측 해역의 해저지형 변화

Bathymetric changes off the sea south of Jinwoo-do Island in the Nakdong River estuary

  • Park, Bong-woon (Department of Port and Logistics Systems, Dong-A University) ;
  • Kim, Sung-bo (Department of Energy and Mineral Resources Engineering, Dong-A University) ;
  • Kim, Jae-joong (Department of Civil Engineering, Dong-A University) ;
  • Kim, Ki-cheol (Center of Liberal Education, Dong-A University)
  • 투고 : 2015.09.30
  • 심사 : 2015.12.20
  • 발행 : 2016.01.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

낙동강 하구를 둘러싸고 있는 울타리 섬들 중 하나인 진우도 남측 해역에서의 해저지형 변동을 2006년 6월부터 2015년 4월까지 총 16회의 수심측정 자료를 이용하여 연구하였다. 이 해역의 동쪽은 진우도와 신자도 사이로 서낙동강과 낙동강 하구둑에서 유입되는 담수의 이동 통로로 해수와 담수의 유입 및 유출 수로가 위치해 있으며, 서쪽은 눌차도와 진우도 사이로 부산신항의 연결잔교를 통하여 해수가 이동하는 수로가 존재한다. 동쪽 수로 연장에서의 변화가 이 해역의 해저지형 변화를 주도한다. 지형 변동은 퇴적 또는 침식만이 일방적으로 진행되는 것이 아니라 퇴적 또는 침식이 진행되다가 어느 일정한 단계가 지나면 급격한 변형을 통하여 회귀하는 형태를 보이고 있다. 특히 연구 지역의 총 퇴적량은 2006년 6월부터 2013년 3월까지 증가하다가 2013년 10월 자료부터 급격히 감소하여 2015년 4월까지 큰 변동없이 유지되고 있는 것을 보여주고 있다는 결론을 얻었다. 이것은 2013년 10월 초에 한반도에 영향을 준 제 24호 태풍 '다나스' (Danas)에 의해 진우도 남측해역의 토사가 외해로 쓸려나간 현상으로 판단된다. 진우도 동쪽에 위치한 수로의 변동은 동서, 남북 방향의 측선을 이용하여 분석하였는데, 수로의 최대수심 위치가 2006년 6월에 비해 2015년 4월까지 서쪽으로 약 100 ~ 130 m, 북쪽으로 약 200 m 이동한 것으로 확인되었다.

Bathymetric changes were studied in the southern sea off the Jinwoo-do Island, which is one of the deltaic barrier islands surrounding the Nakddong river estuary. In this study, 16 bathymetry data sets were obtained from June 2006 to April 2015. Two narrow channels, the one lying between Jinwoo-do and Shinja-do, and the other one lying between Nulcha-do and Jinwoo-do extended into the eastern and western parts of the study area, respectively. The eastern extension of the channel contained a passage of mixed estuarine waters of seawater and river water discharged from the Nakdong river barrier and the west Nakdong River. The western channel connected the Nakdong River estuary with the Busan New Port via a connecting pier. Total volumetric changes of sediments in study area and discharge flow of the Nakdong river barrier were analyzed. Bottom topographical changes occurred mainly in the eastern extension of the channel. These changes were initially characterized by gradual erosion or deposition followed by rapid restoration. The total volume of sediment gradually increased from June 2006 to March 2013, but experienced a sudden decrease in October 2013 because of typhoon Danas. Few fluctuations were observed from October 2013 to April 2015. Analysis of the cross-sectional bathymetry of the north-south direction showed that the deepest point of the eastern channel moved 100-130 m westward and 200 m northward between June 2006 and April 2015.

키워드

참고문헌

  1. Busan Development Institute, Ecological Monitoring of the Nakdong River Estuary (2007-2008)," 2008 (in Korean).
  2. M. L. Stutz and O. H. Pilkey, "Global distribution and morphology of deltaic barrier island systems," Proceedings of 6th International Coastal Symposium, pp. 25-29, 2002.
  3. Y. E. Kim, "Hydrologic investigations around the Nakdong river barrier," In: Environment Research Note No.1, Inje University, pp. 77-86, 1992 (in Korean).
  4. M. O. Hayes, "Barrier island morphology as a function of tidal and wave regime. In: Leatherman SP (ed)Barrier Islands," Academic Press, New York, pp. l-27, 1979.
  5. K. C. Kim, J. J. Kim, Y. E. Kim, K. M. Han, K. K. Choi, and S. T. Jang, "Outflow characteristics of Nakdong river plume," Journal of the Korean Society of Coastal and Ocean Engineers, vol. 8, no. 4, pp. 305-313, 1996.
  6. J. K. Park, B. K. Khim, H. J. Lee, and S. R. Lee, "Recent morphological changes off the shoreface of Jinwoodo and Sinjado in the Nakdong river estuary," Ocean and Polar Research, vol. 36, no. 2, pp. 87-101, 2014 (in Korean). https://doi.org/10.4217/OPR.2014.36.2.087
  7. Y. H. Jeon, H. S. Yoon, and K. S. Lee, "Spatiotemporal variations of coastal sediment transport at barrier islands in the Nakdong river estuary," Journal of the Korean Society of Marine Environment & Safety, vol. 16, no. 2, pp. 161-168, 2010 (in Korean).
  8. E. C. Yoon and J. S. Lee, "Characteristics of seasonal variation to sedimentary environment at the estuary area of the Nakdong," Korean Society of Coastal and Ocean Engineers, vol. 20, no. 4, pp. 372-389, 2008 (in Korean).
  9. S. H. Jung, B. K. Khim, B. O. Kim, and S. R. Lee, "Shoreline-change rates of the barrier islands in Nakdong river estuary using aerial photography and SPOT-5 image," Ocean and Polar Research, vol. 35, no. 1, pp. 1-14, 2013 (in Korean). https://doi.org/10.4217/OPR.2013.35.1.001
  10. J. H. Park, H. S. Yoon, C. I. Yoo, and C. R. Ryu, "Video monitoring of shoreline changes of an offshore bar in the Nakdong River Estuary, South Korea," Journal of the Korean Society of Marine Engineering, vol. 34, no. 4, pp. 575-584, 2010 (in Korean).
  11. B. O. Kim, B. K. Khim, and S. R. Lee, "Development of mosaic aerial photographs for shoreline change study in Nakdong estuary," Ocean and Polar Research, vol. 27, no. 4, pp. 497-507, 2005 (in Korean). https://doi.org/10.4217/OPR.2005.27.4.497
  12. M, Mahapatra, R. Ratheesh, and A. S Rajawat, "Shoreline change analysis along the coast of south Gujarat, India, using digital shoreline analysis system," Journal of the Indian Society of Remote Sensing, vol. 42, no. 4, pp. 869-876, 2014. https://doi.org/10.1007/s12524-013-0334-8
  13. Korea Meteorological Administration (KMA), http://typ.kma.go.kr//, Accessed November 2, 2015 (in Korean).

피인용 문헌

  1. 하구둑 방류와 환경적 인자에 따른 낙동강 하구 지역 해저 지형변화 연구 vol.30, pp.7, 2016, https://doi.org/10.5322/jesi.2021.30.7.507