연안활동시간을 고려한 장소유형별 위험도 평가

서희정,박선중,박설화,박승민,Seo, Heui Jung,Park, Seon Jung,Park, Seol Hwa,Park, Seung Min 한국해안·해양공학회 2022 한국해안해양공학회 논문집 Vol.34 No.5

The Korea Coast Guard evaluates the risk of major coastal activity places to prevent coastal accidents, and patrols and manages them based on that, but it is not responding properly to the continuously increasing number of coastal accidents. The reason for this is that, despite the gradual expansion of coastal activity places, there is a lack of manpower to manage and supervise them, resulting in blind spots in coastal accident safety management. Therefore, in order to solve this problem, it is necessary to prepare more efficient and effective measures that check and supplement the current coastal safety management system. Coastal accidents show different characteristics of accident causes and places due to differences in the activity characteristics of users according to time. As a result of analyzing coastal accident data (2017~2021), the frequency of daytime accidents is high in the case of sea rock, beach, and offshore, where family leisure activities are frequent. In the case of wharf, tidal flat and bridge, where accidents due to drinking, disorientation, and suicide mainly occur, the frequency of accidents at night is high. In addition, there were more accidents on weekends when the number of users increased compared to weekdays. This trend indicates that the user's temporal activity characteristics must be reflected in the risk assessment of coastal activity places. Therefore, in this study, based on the case of coastal accidents, the characteristics of accidents at coastal activity places according to time were identified, and the criteria were presented for risk evaluation by grading them. It is expected that it will be possible to lay the foundation for reducing coastal accidents by efficiently managing and supervising coastal activity places over time using the presented evaluation criteria.

동해안 침식 원인분석 및 침식 영향도 평가

박선중(Seon Jung Park),서희정(Heui Jung Seo),박승민(Seung Min Park),박설화(Seol Hwa Park),안익장(Ike Jang Ahn),서경식(Gyeong Sik Seo) 한국해안해양공학회 2021 한국해안해양공학회 논문집 Vol.33 No.6

연안을 중심으로 시행되는 각종 개발사업은 표사수지 불균형, 연안표사 이동상 및 횡단표사 이동상 변화를 야기하며, 이로 인한 해빈의 완충구간 축소로 연안재해 위험성을 크게 증대시킬 뿐 아니라 회복 불가능한 장기적 해안침식 문제를 초래하게 된다. 연안개발을 위해 건설된 각종 구조물의 영향으로 발생되는 장기적·지속적인 해안침식 현상은 표사수지 및 연안표사와 횡단표사 변화량 평가를 통해 직접적인 원인 규명이 가능하다. 즉, 표사수지 변화, 연안표사 이동, 횡단표사 이동 구분되는 이들 개별적인 원인에 기인한 침식지역과 복합적인 작용에 의한 침식지역의 분류를 통해 연안개발과 해안침식 현상의 인과성 평가가 가능할 것이다. 본 연구에서는 연안개발에 따른 침식 문제가 지속적으로 제기되고 있는 동해안(강원도, 경상북도) 일대 해안을 대상으로 연안 구조물 건설 및 육역 개발 등 주요 개발현황과 연안침식 실태조사 결과를 기반으로 장기적·지속적 침식원인을 분석하였다. 아울러 인공구조물 건설에 따른 침식의 정도를 평가하고자 침식 영향도 개념을 정립하고, 침식 영향도 평가를 위한 세 가지 방법론을 제안하였다. 연안침식 실태조사에서 검토된 해빈 영상분석 자료를 활용하여 하저항을 대상으로 침식 영향도를 평가하였으며, 평가결과 하저항 개발은 93.4%, 호안도로 건설은 6.6%로 침식에 영향을 미친것으로 평가되었다. Various development projects occurring on the coast cause an imbalance of surface sediments, causing coastal disasters or irreversible coastal erosion. Coastal erosion caused by the influence of various port structures built through coastal development can be directly identified by evaluating changes in the sediment budget, longshore sediment, and cross-shore sediment. In other words, it will be possible to evaluate the causality between coastal development and coastal erosion by classifying regions due to single cause and regions due to multiple causes according to the changes in the sediment classified into the three types mentioned above. In this study, the cause of long-term and continuous erosion was analyzed based on the analysis results of the coastal development history and the Coastal Erosion Monitoring targeting the coast of Gangwon-do and Gyeongsangbuk-do on the east coast. In addition, in order to evaluate the degree of erosion caused by the construction of artificial coastal structures, the concept of erosion impact assessment was established, three methods were proposed for the impact assessment. The erosion impact of Hajeo port was assessed using the results of satellite image analysis presented in the Coastal Erosion Monitoring Report, it was assessed that the development of Hajeo port had an impact of 93.4% on erosion, and that of the coastal road construction had an impact of 6.6%.

연안활동장소의 위험도 평가체계 수립 연구

박선중(Seon Jung Park),박설화(Seol Hwa Park),서희정(Heui Jung Seo),박승민(Seung Min Park) 한국해안해양공학회 2021 한국해안해양공학회 논문집 Vol.33 No.6

연안안전사고는 인적과실이 차지하는 비율이 매우 높고 같은 요인에 의한 사고가 반복적으로 발생하는 특징이 나타나고 있다. 이들 장소를 중심으로 관리기관에서는 사고 예방을 위한 각종 대비책을 마련하여 시행하고 있으나 제한된 예산에 따른 안전시설물 및 안전관리 인력의 부족과 기상청 기상특보에 의존하고 있는 연안안전사고 위험 예보제 운용체계의 한계 등으로 선제적·능동적 대응력이 많이 떨어지는 것이 현실이다. 본 연구에서는 연안안전사고 발생 이후의 수습 중심 안전관리체계에서 안전사고 발생 이전에 사고 유발요소의 관리와 위험도 예측·평가, 사고발생 이후의 대응 및 경감대책을 시행할 수 있는 선제적, 능동적 연안안전 관리체계 구축기반 마련의 일환으로 연안활동장소의 위험도 평가체계를 수립·제안하였다. 2017년 이후의 연안안전사고 현황 분석을 통해 연안활동장소별 안전사고를 유발하는 주요 위험요인을 식별하였으며, 이를 기반으로 위험도 평가를 위한 주요 평가인자 및 지표를 설정하였다. 제안된 위험도 평가 방법론은 해양경찰청에서 지정·관리되고 있는 주요 40개 위험구역을 대상으로 적용하였다. Coastal safety accidents are characterized by a high proportion of human negligence and repeated occurrences of accidents caused by the same factors. The Korea Coast Guard prepares and implements various countermeasures to prevent accidents at coastal safety accident sites. However, there is a shortage of safety facilities and safety management personnel according to the limited budget. In addition, the ability to be proactively and proactively respond is low due to the limitations of the coastal safety accident risk forecasting system, which relies on the meteorological warning of the Korea Meteorological Administration. In this study, as part of preparing the foundation for establishing a preemptive and active coastal safety management system that can manage accident-causing factors, predict and evaluate risk, and implement response and mitigation measures after an accident occurs before coastal safety accidents occur. The establishment of a risk assessment system was proposed. The main evaluation factors and indicators for risk assessment were established through the analysis of the status of coastal safety accidents. The risk assessment methodology was applied to 40 major hazardous areas designated and managed by the Korea Coast Guard.

지형공간정보를 활용한 지형형태학적 분석 및 위험도 평가 방안 연구

김병주,박선중,최일훈,박설화,박승민,서희정,Kim, Byung Ju,Park, Seon Jung,Choi, Il Hoon,Park, Seol Hwa,Park, Seung Min,Seo, Heui Jung 한국해안·해양공학회 2022 한국해안해양공학회 논문집 Vol.34 No.5

Rock platforms and TTP (breakwater) are dangerous environments commonly subject to tidal and high wave energy on the open coast. This paper is a study on risk assessment to provide risk information, which is a representative method for preventing coastal safety accidents. Risk assessment based on geo-morphological information was conducted for the Halmi-Halabi rock platform in Anmyeon-eup, Taean-gun, Chungcheongnam-do. As a result of the risk assessment in 16 directions, the risk was evaluated high in the NE, ENE, S, SSW, and W directions, where there are many sections with slopes exceeding ±20°, and the NW direction was the lowest. Geo-morphology on rock platform is central to understanding what makes one stretch of complex coastline more hazardous than another, and it can be used to create site-specific morphological risk item. In particular, it will be assisting coastal managers in an effort to reduce the number of injuries and drowning incidents by providing hazard information to assess the relative risk.