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Long-term Changes of Sediment and Topography at the Southern Kanghwa Tidal Flat, West Coast of Korea

한국 서해안 강화 남부 갯벌 퇴적물 및 지형의 장기적인 변화

  • Woo, Han Jun (Korean Seas Geosystem Research Unit, Korea Institute of Ocean Science and Technology)
  • 우한준 (한국해양과학기술원 관할해역지질연구단)
  • Received : 2013.07.11
  • Accepted : 2013.09.06
  • Published : 2013.11.30

Abstract

Comparisons of surface sediment distributions in summer 1997 and 2011 and elevations on the tidal flats in April 1998 and March 2013 had been used for understanding the long-term changes of sedimentary environments at southern Kanghwa tidal flat, west coast of Korea. The mud sediments dominated in the eastern part and sandy mud sediments dominated in the western part of the tidal flat in 1997. In 2011, the surface sediments were dominant mud and sandy mud at Sunduri and Tonggum in the eastern part, sandy mud at Tongmakri in the middle part, and sand and muddy sand at Yeochari and Changhwari tidal flats in the western part. The area of mud sediments had decreased, but that of sand-mud mixed sediments extended to eastward tidal flat for 14 years. The long-term topographic changes showed that deposition occurred at Tongmakri and Yeochari and erosion occurred at Changhwari tidal flat during 15 years. These changes should be effected the local hydrodynamic changes by several constructions near the tidal flat since the 1990s.

강화 남부 갯벌의 장기적인 퇴적환경 변화를 파악하기 위하여 1997년과 2011년 여름철 표층 퇴적물의 분포와 1998년 4월과 2013년 3월의 갯벌 고도를 비교하였다. 표층퇴적물은 1997년에 동부의 펄, 서부의 모래 펄 퇴적물이 우세하였으나, 2011년에는 동부의 선두리와 동검도 갯벌은 펄과 모래 펄, 중부의 동막리 갯벌은 모래 펄, 그리고 서부의 여차리와 장화리 갯벌은 모래와 펄 모래 퇴적물이 우세하게 분포하였다. 지난 14년 동안 펄 퇴적물 면적은 감소하였으나, 모래와 펄 혼합 퇴적물의 면적은 동쪽으로 확장되었다. 갯벌의 장기적인 지형 변화는 지난 15년 동안 동막리와 여차리 갯벌은 퇴적, 장화리 갯벌은 침식된 것으로 나타났다. 이러한 변화들은 1990년대 이후 강화 남부 갯벌 주변에 여러 종류의 인공구조물건설에 의하여 지역적인 수리적 변화가 영향을 주었을 것이다.

Keywords

References

  1. Barbier, EB, Hacker, SD, Kennedy, C, Koch, EW, Stier, AC and Silliman, BR (2011). The value of estuarine and coastal ecosystem services, Ecological Monographs, 81(2), pp. 169-193. https://doi.org/10.1890/10-1510.1
  2. Costanza, R, d'Arge, R, Groot, R, Farber, S, Grasso, M, Hannon, B, Limburg, K, Naeem, S, O'Neill, RV, Paruelo, J, Raskin, RG, Sutton, P and van den Belt, M (1997). The value of the world's ecosystem services and natural capital, Nature, 387, pp. 253-260. https://doi.org/10.1038/387253a0
  3. Folk, RL (1968). Petrology of Sedimentary Rocks, Hemphills's, Austin, TX.
  4. Folk, RL and Ward, W (1957). Brazos River bar: A study in the significance of grain size parameters, Journal of Sedimentary Petrology, 27, pp. 3-26. https://doi.org/10.1306/74D70646-2B21-11D7-8648000102C1865D
  5. Gao, S and Collins, M (1992). Net sediment transport patterns inferred from grain-size trends, based upon definition of "transport vectors", Sedimentary Geology, 80, pp. 47-60.
  6. KHOA. (1981). Nautical chart from Yeongjong-do to Yongmae-do, No. 311, Korea Hydrographic and Oceanographic Administration.
  7. KORDI. (2007). Investigation service for allotted amount of compensation in fishery damage in Ganghwa-do and Gyeonggi-Incheon area Korea, BSPI 29001-1931-3, Korea Ocean Research & Development Institute.
  8. KORDI. (2008). Development of management and restoration technologies for estuaries with focus on Han River estuary region, BSPE 98101-2028-7, Korea Ocean Research & Development Institute.
  9. Lee, YK, Ryu, JH, Choi, JK, Soh, JG, Eom, JA and Won, JS (2011). A study of decadal sedimentation trend changes by waterline comparisons within the Ganghwa tidal flats initiated by human activities, Journal of Coastal Research, 27(5), pp. 857-869.
  10. McLaren, P and Bowles, D (1985). The effects of sediment transport on grain-size distributions, Journal of Sedimentary Petroleum, 55, pp. 457-470.
  11. Noh, B. H., Lee, C. H. et al. (2006). Sustainable estuary management III-1, KEI Publication No. 06-23-01.
  12. Woo, HJ and Je, JG (2002). Changes of sedimentary environments in the southern tidal flat of Kanghwa island, Ocean and Polar Research, 24(4), pp. 331-343.
  13. Woo, HJ, Bahk, JJ, Lee, YG, Je, JG and Choi, JU (2004). Characteristics of sediments in the Kanghwa tidal flat on the west coast of Korea, Journal of Wetlands Research, 6(1), pp. 167-178.
  14. Woo, HJ, Jang, S and Kwon, SJ (2012). Changes in sediment characteristics in the eastern tidal flat of Donggum island in Ganghwa, west coast of Korea, Journal of Wetlands Research, 14(3), pp. 375-384.