파향제어방식을 이용한 새로운 해안침식대책 기술 개발(1):해안침식 발생ㆍ대책 동향 및 신방식 제안

• Published in: 한국연안방재학회지 Vol. 3; no. 1; pp. 14 - 35
• Main Authors: 강윤구(Yoon-Koo Kang), 홍창배(Chang-Bae Hong)
• Format: Journal Article
• Language: Korean
• Published: 한국연안방재학회 30.01.2016; Korean Society of Coastal Disaster Prevention; (사)한국연안방재학회
• Subjects: 지구과학; Longshore sand transport; Wave direction control system; Coastal erosion; Artificial reef(Submerged breakwater with wide crest); Shore-oblique detached type breakwaters
• ISSN: 2288-7903; 2288-8020
• DOI: 10.20481/kscdp.2016.3.14

The coastal erosion is largely affected either by construction of port/fishery harbor, or coastal road revetment, which of each breaks the balance of longshore sand transport and one of cross-shore sand transport in coast, respectively. The detached type breakwater have been applied to control longshore sand transport as coastal erosion measures against construction of port/fishery harbor which cause longshore sand transport. However, it also produces new coastal erosion near area. Recently, the artificial reef (A.R.) is almost constructed on the standpoint of landscape as coastal erosion measures in Korea. A.R. is a submerged breakwater with wide crest and had developed to overcome weakness on the detached and submerged breakwaters. The wave is turned into strong longshore current passing through A.R., which occasionally results in scouring erosion around the A.R by increasing the water level at the back of A.R. In this study, we examined the coastal erosion occurrence by port/fishery harbor development and tendency of erosion measures. Also, problems of A.R. are examined with review on research and application example. Based on these, this study proposes new coastal erosion management method, ‘New CeM’, for erosion measure in coast where balance of longshore sand transport is broken. Instead of directly protecting against the ingressive wave, the new method is the wave direction control system for correcting the imbalance of longshore sand transport by obliquely installing breakwater of detached type. The performance and physical phenomenon of New CeM will be introduced later. KCI Citation Count: 3