Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Topography Change due to Setup Condition of Artificial Reef

인공리프의 설치조건에 따른 표사이동 특성 연구

  • 심규태 (가톨릭관동대학교 토목공학과) ;
  • 김규한 (가톨릭관동대학교 토목공학과)
  • Received : 2017.04.24
  • Accepted : 2017.06.26
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study was to investigate the change of length, opening width, and number of openings effecting on topography change around artificial reefs under erosive wave condition. Hydraulic model test was conducted to see sediment transport around the structures and the relation among the installation condition of the artificial reefs, generated velocity, wave deformation, and topographic change was reviewed. Experimental results show that the sediment transport rate was reduced; however, the scour around the structures was increased under the condition of having a single opening compared to the structures having a plurality of openings which shows inversely proportional to the size of Lr/W.

본 연구에서는 침식성 파랑의 내습조건에 대해 인공리프의 길이(Lr), 개구폭(W), 개구부 수의 변화가 인공리프 주변 지형에 미치는 영향을 검토하고자 하였다. 구조물 주변에서의 표사이동 양상은 이동상실험을 통하여 검토하였으며 인공리프의 설치조건과 발생 유속 및 파랑변형, 지형변동과의 관계에 대해 고찰하였다. 실험결과 인공리프의 설치로 인하여 배후 침식량은 감소하였으나 개구부내에서의 세굴은 복수의 개구부를 갖는 구조에 비하여 단일 개구부를 갖는 조건에서 증가되었으며, Lr/W의 변화와 깊은 연관성을 보이는 것으로 확인되었다.

Keywords

References

  1. Araki, S., Fumoto, H., Miyoshi, H. and Deguchi, I. (2005). Local scouring at toe of submerged breakwater and deformation of sumerged breakwater body. Proc. of Civil Eng. in the Ocean, 21, 921-926. (in Japanese). https://doi.org/10.2208/prooe.21.921
  2. Araki, S., Miyoshi, H., Igawa, T., Tanaka, T. and Deguchi, I. (2006). Topography change and settlement of breakwater body caused by constructing submerged breakwater. Proc. of Civil Eng. in the Ocean, 22, 751-756. (in Japanese). https://doi.org/10.2208/prooe.22.751
  3. Battjes, J.A. (1974). Surf similarity. Proc.14th ICCE, 466-480.
  4. Brown, C.B. (1950). Engineering Hydraulics, edited by H. Rouse, John Wiley & Sons, Inc., New York, N.Y.
  5. Galvin, C.J. Jr. (1968). Breaker type classification on three laboratory beaches. J. Fluid Mech., 49, 1-20.
  6. Kim, K.H. and Shim, K.T. (2016). Hydraulic characteristics investigation due to the change of gap width between artificial reefs. J. of Korean Society of Coastal Ocean Engineers, 26(6), 408-415. (in Korean).
  7. Minami, M. and Mano, A. (2002). Study in bottom velocity distribution around opening of impermeable artificial reefs. Proc. of Civil Eng. in the Ocean, 18, 401-406. (in Japanese). https://doi.org/10.2208/prooe.18.401
  8. Minami, M. and Mano, A. (2003). Numerical analysis on wave field bear the opening of artificial reefs. Proc. of Civil Eng. in the Ocean, 19, 207-212. (in Japanese). https://doi.org/10.2208/prooe.19.207
  9. Osanai, K. and Minami, M. (2003). Experimental study on vertical velocity distribution around the opening of artificial reefs. Proc. of Civil Eng. in the Ocean, 19, 213-218. (in Japanese). https://doi.org/10.2208/prooe.19.213
  10. Osanai, K. and Minami, M. (2004). Numerical analysis on bottom current near the opening of artificial reefs. Proc. of Civil Eng. in the Ocean, 20, 659-664. (in Japanese). https://doi.org/10.2208/prooe.20.659
  11. Ota, T., Kimura, K. and Matsumi, Y. (2009). On wave runup height and overtopping quantity of gentle slope revetment placed behind artificial reef. J. of Jap. Society of Civil Engineers, Ser. B2 (Coastal Eng.), 65(1), 776-780. (in Japanese). https://doi.org/10.2208/kaigan.65.776
  12. Shore Protection Manual. (1984). 4th ed., 2 vols, U.S Army engineer waterways experiment station, coastal engineering research center, U.S. government printing office, washington, DC.
  13. Sunamura, T. and Horikawa, K. (1974). Two-dimensional beach transformation due to waves. Proc. 14th Coastal Engineering Conference, American Society of Civil Engineers, 84-900.
  14. Swarts, H. (1974). Offshore sediment transport and equilibrium beach profiles. Delft Hydr. Lab. Publ. No. 131.
  15. The Ministry of Land, Infrastructure and Transport National Institute for Land and Infrastructure Management (2004). Guide with a design of artificial reef. (in Japanese).