• Journal of Korean Society of Coastal and Ocean Engineers
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• v.14 no.4
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• pp.247-256
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• 2002

Most of fishing ports on the east coast of Korea have constructed around sand beach. Such fishing port structure had caused important effect in erosion of neighborhood sand beach. In order to solve the problems, we have to understand the mechanism through estimations and accurate reproduction beach erosion. Simulataneously, we have to devise a suitable countermeasure for beach erosion to the object coast. This study suggests economically substantial countermeasure for beach erosion around the fishing port and investigates, the preventive effects using a numerical simulation technique.

• Magazine of the Korean Society of Hazard Mitigation
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• v.7 no.1 s.24
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• pp.47-56
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• 2007

자원개발 및 해사채취 그리고 최근에는 기후변화에 따른 해수면상승, 고파랑 및 태풍강화 등의 영향으로 연안침식이 가속화되고 있어 연안재해의 측면에서 체계적이며 지속적으로 관리할 필요성이 제기되고 있다. 이에 본 연구에서는 끊임없이 변화하고 있는 해수 욕장의 해안선 변화를 파악하기 위하여 매우 경제적이고 연속적으로 해안선 변화를 파악할 수 있는 비디오 영상을 이용한 모니터링 기법을 이용하여 2003년 부터 우리나라 주요 20개 백사장에 대해 연안침식의 정량적 현황분석을 실시하여 왔다. 그 외에도 백사장 62개소에 대해 모니터링의 일환인 연안침식 이력조사를 매년 실시하여 침식현황에 대한 정성적 평가를 실시하고 있다. 모니터링에 의한 침식현황 분석결과에 의하면 우리나라의 전 연안은 양빈을 실시하여 인위적으로 현상황을 유지하고 있는 몇몇 지역을 제외하고는 완만한 침식경향을 보이고 있어 대책수립의 필요성이 제기되고 있다. 더욱이 전국적으로 침식지역이 확대되고 있어, 2007년${\sim}$2010년까지 주요 백사장 16개소에 비디오 모니터링 체계를 추가 구축하고 전국 120개의 침식 지역에 대하여 침식이력조사를 확대 수행하여 연안관리 및 대책수립에 필요한 기초자료를 축적할 계획이다.

• Monthly Newsletter
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• no.204
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• pp.5-5
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• 2004

서울 소재 어장정비업체도 등록 가능 - 일본 전국 어항어장 정비기술 연구발표회 개최 - 경기 전곡 해양레저항으로 개발 - 전국 백사장 8곳 연안침식 모니터링 실시

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.142-149
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• 2019

In this study, the past erosion history and current status in the CHUNG-UI beach of Eulwang-dong, Jung-gu, Incheon-Si, South Korea were investigated and analyzed the wave with wave-induced current to investigate the causes of coastal erosion. As a result, the significant wave height ($H_{1/3}$) was in the range of 0.07~1.57 m and the mean value was 0.21 m. The maximum wave height ($H_{max}$) was in the range of 0.02-4.76m and the mean value was 0.27m. The vertical wave height and cycles were estimated through numerical model experiments of wave transformation. The 50-year frequency design wave height ranged from 0.82m to 3.75m. As a result of the experiment of wave-induced current, wave-induced current in the CHUNG-UI beach was decreased after the installation of the Detached breakwater and the Jetty. On the other hand, when the crest elevation was increased up to 5 m, there was no significant change, but when the crest elevation was increased to 8m, strong wave-induced current occurred around the submerged breakwaters due to lowered depth of water. In addition, the main erosion of the CHUNG-UI beach is due to the intensive invasion of the wave characteristics coming from the outer sea into the white sandy beach. The deformation of the wave centered on the front of the sandy beach caused additional longshore currents flowing parallel to the sandy beach and rip currents in the transverse direction, thus confirming that the longshore sediment was moved out of the front and out of the sea. The results of this study can be used as preliminary data for the recovery of the sand and the selection of efficient erosion prevention facilities.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.920-926
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• 2019

In this study, we analyzed the erosion variation of beach area at Haeundae Beach after coastal improvement project using video monitoring system operated by the Coastal Erosion Monitoring (Ministry of Oceans and Fisheries). Haeundae Beach was well maintained and stabilized following large scale nourishment through coastal improvement project despite of seasonal fluctuations. However, multiple typhoons over the last two years caused beach stabilization patterns and seasonal fluctuations to lost equilibrium, resulting in rapid erosion. In particular, the sandy beach was eroded by typhoon Solic and Kongray in 2018 and failed to recover beach area in winter by seasonal fluctuations. And due to multiple typhoons in 2019, the beach area was reduced 9.5 % (12,607 ㎡) year-on-year. According to analyze the observed wave and beach area data in Haeundae, the tendency of erosion and sedimentation was influenced by seasonal incident wave direction for each section(west, center and east part). Therefore, to identify the causes of decreasing seasonal fluctuation characteristics and continuous erosion, hereafter, more precise monitoring of different factors are needed, such as the crest heights of submerged breakwater and its loss of function, and sand leakage to the outside around submerged breakwater.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2003.08a
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• pp.227-232
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• 2003

연안침식현상은 우리나라 핀 해역에서 다양한 원인에 의해 발생하고 있으며 침식현상에 따른 해안선후퇴, 백사장상실. 기타 해안재해의 배후지 전파증가 등 다양한 피해가 발생하고 있다 연안침식현상에 대한 연구는 다양하게 이루어지고 없으나 대부분 개별지역의 침식현상규명 및 대책을 위한 연구가 대부분이며 우리나라에서 발생하는 다양한 침식현상에 대한 전체적인 개관이 이루어지고 있지 못한 것이 현실이다. (중략)

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.20 no.6
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• pp.602-610
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• 2008

A beach has such functions as disaster prevention, providing an amenity place, attracting people and maintaining the coastal ecosystem. Already well known that a beach provides an amenity place, it has also been ascertained through various examples that a sand beach performs a very important function to maintain the coastal ecosystem as well. However, Beach erosion began to occur in Korea in the 1990's and posed a social problem in the late 1990's. Nowadays, along the shorelines of Korea's many beaches, about 400 beaches have reported erosion. This study demonstrate the Disaster Overall Prevention System for Beach Erosion and it's application. The Disaster Overall Prevention System for Beach Erosion is a coastal management system established for managing the implementation of long-term countermeasures to protect eroded beaches effectively in this study. Especially, the economic feasibility test and adaptive management for sustainable mitigation included in DOPS. The coastal prevention work applied to Namae beach is carried out by Disaster Overall Prevention System. Consequently, beach nourishment is proposed as a main countermeasure. Also, submerged artificial reefs and groin integrating artificial rock are proposed as secondary countermeasures for beach erosion. This resulted to be the optimal beach erosion countermeasure from DOPS, considering the economic and environmental conditions of the study area.

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.24 no.5
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• pp.366-371
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• 2012

High swell has been known for the one of the main causes of beach erosion in the east coast of Korea. In this study, coastal topography changes due to high swells are simulated to find its effect on the backshore by using movable bed experiments and numerical experiments. Sea bottom topographical changes due to various incident waves were investigated using CSHORE model in the numerical experiments. Furthermore, the mechanism and the phenomena of beach erosion due to waves and high swells on the foreshore and backshore were analyzed and compared with movable bed hydraulic experiments.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.241-243
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• 2014

Recently, as the coastal erosion impacts greats to both social and economical aspects, each local government is trying to setup its countermeasures. However, it is necessary to survey the change of sediment movement characteristics and investigate the continuous environment change by long-term monitoring after building prevention constructions. In this study, predictions on wave deformation and sediment movement deduced through the numerical modeling are made, based on the ordinary and extraordinary wave through seasonal superiority wave direction, height, period and long-term wave characteristics on the eroded beach of central West sea.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.303-304
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• 2008

1970년부터 해운대 신시가지 조성 및 춘천의 복개공사, 해안 주변의 매립, 도로건설 등의 연안 관련 사업이 환경에 미치는 종합적인 영향에 대한 검토도 없이 시행되어, 해운대 백사장으로 유입되어야 할 토사가 주공급원인 육지로부터 잠정적으로 차단되었다. 해운대 해수욕장의 해빈이 갈수록 감소되고 있는 가운데, 유실된 토사가 퇴적되는 연안의 해저지형에 대한 조사를 통해 정량적인 분석과 기간별 침퇴적 경향을 알아보는 연구가 필요하다. 따라서 본 연구에서는 수심 측량 자료를 이용하여 GIS기법으로 해저지형도를 제작하였고, 해저지형을 등간격으로 나누어 각 구간별 침퇴적 경향을 분석해 보았다. 그 결과 계절별로 침퇴적을 반복하고 있었고, 여름에는 침식, 겨울은 퇴적되는 경향을 보였다.