Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Monitoring of Tidal Sand Shoal with a Camera Monitoring System and its Morphologic Change

카메라를 활용한 조석사주 관측시스템 구축 및 지형변화

  • Received : 2014.10.30
  • Accepted : 2015.03.25
  • Published : 2015.03.31
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Abstract

A tidal sandshoal, called 'Puldeung' in the Daeijackdo Marine Protected Area(DMPA), is facing erosion due to sand mining in the nearby coastal region. To monitor the morphologic change and erosion of Puldeung, a camera monitoring system was established at the top of Song-Ee Mountain in Daeijack Island. The system consists of 2 Cannon digital cameras, Eye-fi memory card/Long-Term Evolution wireless network, and solar power supply. The acquired camera images were analyzed to obtain the area of Puldeung by the following methods: geometric correction of image, identification of shoreline, areal measurement of Puldeung and its error estimation. To compare the Puldeung area with previously measured area of 1.79 km2 at tidal height of 137 cm in 2008 and of 1.59 km2 at tidal height of 148 cm in 2010, we selected images with same tidal heights. The Puldeung area was 1.37 and 1.23 km2 at the tidal height of 137 and 148 cm, respectively. The erosion at DMPA is very severe and thus it is imperative to initiate the morphodynamical study on the seasonal variation and long-term evolution of Puldeung as well as the causes and measures of Puldeung erosion.

인천시 옹진군의 대이작도 주변해역 해양보호구역에 존재하는 '풀등'이라 불리는 조석사주는 인근 선갑지적의 해사채취로 인해 침식의 위협에 직면해있다. 접근성이 좋지 못한 풀등의 침식을 모니터링하기 위하여 대이작도의 송이산정상에 무인영상 자동모니터링시스템을 구축하였다. 영상모니터링시스템은 매 10분마다 $4608{\times}3456$의 해상도로 풀등을 분할 촬영하는 2대의 디지털 카메라, 실시간으로 영상자료를 실험실로 전송하는 Eye-fi 메모리카드와 LTE 휴대전화로 구성된 무선네트워크, 그리고 카메라와 무선네트워크 구동에 필요한 전력을 공급하는 태양광 전원공급시스템으로 구성되어 있다. 영상모니터링시스템으로 획득한 영상자료는 기하보정, 해안선판독, 풀등 면적 산정 및 오차산정의 영상분석방법을 적용하였다. 2012 해양보호구역 조사관찰 보고서에 기록된 조위 137 cm의 2008년 풀등 면적 1.79 km2과 조위 148 cm의 2010년 면적 $1.59km^2$과 비교하기 위하여, 동일 조위의 풀등 면적을 획득하였다. 2013년에 조위 137과 148 cm일 때 풀등의 면적은 각각 1.37과 $1.24km^2$로 나타났다. 2008-2013년 사이에 대이작도 주변해역 해양보호구역의 풀등에서 약 $0.42km^2$가 감소하였으며 2010-2013에는 약 $0.35km^2$가 감소하였다. 대이작도 해양보호구역의 풀등에서 진행되는 침식은 심각한 정도이며, 이러한 침식의 계절적인 변동 및 퇴적역학적 원인 규명이 시급하게 이루어져야 할 것이다.

Keywords

References

  1. B. C. Kum and D. H. Shin, "Dune migration on an offshore sand ridge in the southern gyeonggi Bay," Ocean and Polar Research, vol. 35, no. 1, pp. 51-61, 2013 (in Korean). https://doi.org/10.4217/OPR.2013.35.1.051
  2. H. G. Bang, H. Y. Lee, J. C. Jang, C. W. Lee, and J. G. Oh, "History and characteristics of tidal sand ridges in Kyeonggi bay, Korea," Journal of the Korean Society of Oceanography, vol. 29, no. 3, pp. 278-286, 1994b (in Korean).
  3. D. Knuth. The Art of Programming. 2nd ed. Addison-Wesley, 1973.
  4. Y. S. Park, G. G. Ji, and H. G. Bang, Basic Research on Marine Environmental Geology of the Kyeonggi Bay, Technical Report KR-95(B)-9, Korea Institute of Geoscience And Mineral Resources, Korea, 1995 (in Korean).
  5. T. S. Jang, Stratigraphic Development of Large-scale, Tidal Sand Bars in Gyeonggi Bay, Technical Report JP2006_024-2007(1), Korea Institute of Geoscience And Mineral Resources, Korae, 2007 (in Korean).
  6. H. G. Bang, C. W. Lee, and J. G. Oh, "Origin and characteristics of sand ridges in the western continental shelf of Korean peninsula," Journal of the Korean Society of Oceanography, vol. 29, no. 3, pp. 217-227, 1994 (in Korean).
  7. S. S. Chun, G. H. Min, and I. T. Lee, Evolution of Transgressive Subtidal Sand Ridges and Intertidal-Flat Bodies in the Kyeonggi Bay Area, and Its Appliction to Ancient Transgressive Coastal Deposits, Research Report to Korea Research Foundation, R01-2001-000-0008-0, pp. 54, 2003 (in Korean).
  8. Y. K. Kwon, "Late quaternary sequence stratigraphy in Kyeonggi bay, mid-eastern yellow sea," Journal of the Korean Earth Science Society, vol. 33, no. 3, pp. 242-258, 2012 (in Korean). https://doi.org/10.5467/JKESS.2012.33.3.242
  9. Y. O. Lee, S. I. Choi, and G. C. Jung, "Seismic stratigraphy and sedimentary environment of the Dukjuk-Do sand ridge in western Gyeonggi bay, Korea," Journal of the Engineering Geology, vol. 24, no. 1, pp. 9-21, 2014 (in Korean). https://doi.org/10.9720/kseg.2014.1.9
  10. J. Y. Choi, Y. K. Kwon, and G. S. Chung, "Late quaternary stratigraphy and depositional environment of tidal sand ridge deposits in Gyeonggi bay, west coast of Korea," Journal of the Korean Earth Science Society, vol. 33, no. 1, pp. 10-19, 2012 (in Korean).
  11. B. C. Kum, D. H. Shin, S. K. Jung, Y. K. Lee, and J. G. Oh, "Morphological characteristics and control factors of bedforms in southern Gyeonggi bay, yellow sea," Journal of the Korean Earth Science Society, vol. 31, no. 6, pp. 608-624, 2010a (in Korean). https://doi.org/10.5467/JKESS.2010.31.6.608
  12. B. C. Kum, D. H. Shin, S. G. Jung, S. Jang, and J. G. Oh, "Morphological features of bedforms and their changes due to marine sand mining in southern Gyeonggi bay," Ocean and Polar Research, vol. 32, no. 4, pp 337-350, 2010b (in Korean). https://doi.org/10.4217/OPR.2010.32.4.337
  13. M. J. Park, Modelling of Sediment Transport and the Formation of Sand Shoal at Macro-tidal Area, Research Report to Korea Research Foundation, pp. 32, 1999 (in Korean).
  14. D. L. Choi and S. R. Kim, "Transport of sandy sediments in the yellow sea off Tae-An peninsula, Korea," Journal of the Korean Society of Oceanography, vol. 27, no. 1, pp. 66-77, 1992 (in Korean).
  15. Incheon Regional Maritime Affairs & Port Authority, "2010 Citizen's Monitoring of Daeijackdo Marine Protected Area," pp. 63, 2010 (in Korean).
  16. R. A. Hollman and A. H. Sallenger. Jr, "Set-up and swash on a natural beach," Journal of Geophysical Research, vol. 90, no. C1, pp. 945-953, 1985. https://doi.org/10.1029/JC090iC01p00945
  17. J. W. Maresca and E. Seibel, "Errestrial photogrammetric measurements of breaking waves and longshore currents in the nearshore zone," Proceedings of the 15th Conference on Coastal Engineering, pp. 681-700, 1976.
  18. R. A. Hollman and R. T. Guza, "Measuring run-up on a natural beach," Coastal Engineering, vol. 8, no. 2, pp. 129-140, 1984. https://doi.org/10.1016/0378-3839(84)90008-5
  19. A. Kroon, M. A. Davidson, S. G. J. Aarninkhof, R. Archetti, C. Armaroli, M. Gonzalez, S. Medri, A. Osorio, T. Aagaard, R. A. Holman, and R. Spanhoff, "Application of remote sensing video systems to coastline management problems," Coastal Engineering, vol. 54, no. 6-7, pp. 493-505, 2007. https://doi.org/10.1016/j.coastaleng.2007.01.004
  20. T. R. Kim, G. S. Lee, and G. D. Seo, "Review of coastal environmental measurement techniques using video monitoring," Journal of Korean Society of Coastal and Ocean Engineers, vol. 10, no. 1, pp. 45-53, 1998 (in Korean).
  21. J. B. U. Kim, Y. A. Park, I. S. Oh, B. G. Kim, and G. S. Choi, "Beach profile estimation using a photogrammetry," Journal of Korean Society of Oceanography, vol. 3, no. 4, pp. 228-233, 1998 (in Korean).
  22. T. S. Kang, S. Y. Nam, and M. H. Kim, "Analysis of coastal erosion in Korea usingn real-time video monitoring Technique, Korean," Korean Society of Hazard Mitigation, vol. 7, no. 1, pp. 47-56, 2007 (in Korean).
  23. T. S. Kang, K. H. Kim, S. Y. Nam, and C. S. Hwang, "The characteristics of Haeundae beach morphodynamics using video monitoring method," Proceedings of the Korea Society of Marine engineering, pp. 347-348, 2009 (in Korean).
  24. Korea Hydrographic and Oceanographic Administration, "Development of coastal erosion monitoring system," pp. 209, 2009 (in Korean).
  25. H. S. Yun, S. U. Ryu, and T. S. Kang, "Monitoring system of sandbar variation of estuary using video-based technique," Journal of the Korean Society of Marine Engineering, vol. 32, no. 4, pp. 630-636, 2008 (in Korean). https://doi.org/10.5916/jkosme.2008.32.4.630
  26. J. H. Park, H. S. Yun, 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).
  27. T. L. Kim and S. G. Park, "Study on intertidal flat topography observation using camera images," Journal of Korean Society of Oceanography, vol. 11, no. 4, pp. 145-151, 2006 (in Korean).
  28. S. G. J. Aarinkhof, I. L. Turner, T. D. T. Dronkers, M. Caljouw, and L. Nipius, "A video-based technique for mapping intertidal beach bathymetry," Coastal Engineering, vol. 49, no. 4, pp. 275-289, 2003. https://doi.org/10.1016/S0378-3839(03)00064-4
  29. Korea Marine Environment Management Corporation, "Research and monitoring of 2012 marine protected area," 11-1611000-002539-10, pp. 259, 2012 (in Korea).

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