• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.376-379
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• 2006

A numerous oil slicks of natural origin were revealed in the southwest (SW) part of Caspian Sea by the synthetic aperture radar (SAR) images acquired by Envisat satellite in 2003-2004. On the basis of computer processing, visual analysis of SAR images and comparisons with bathymetry, geophysical and seismic data in geographic information system (GIS), a link between these slicks and unloading of liquid hydrocarbons in the SW Caspian is established. Oil slicks are basically concentrated above domes of local geological formations of the sedimentary cover. In total more than 90 seeps and mud volcanoes having a repeating regime and representing an active type were identified; they are distributed across the SW Azerbaijan and West Iranian sectors. Periodical occurrence of slicks can reflect alternation of mud volcanism pulses forced by intensive seismicity with the quiet periods. Seepage rate of oil in the SW part of the Caspian Sea according to SAR images is estimated to be up to 16,000 metric tons per year. The importance of unloading of oils on hydrochemistry and ecological conditions of the Caspian Sea is demonstrated. Conclusion is done that the Envisat SAR to be an excellent tool for studying oil seeps through observation oil slicks floating on the sea surface.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.950-953
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• 2006

SIMP is an international project funded by INTAS aimed at improving the information content, which can be inferred from multi-sensor satellite imagery of marine coastal areas. Scientific teams from Germany, UK, Portugal, and Russia focus on the development of novel tools for marine remote sensing of the coastal zone. In particular, the project teams' benefit from the fact that surface films may enhance the signatures of hydrodynamic processes such as plumes, internal waves, eddies, etc., on microwave, optical, and infrared imagery. The project's objectives are to develop a robust methodology for identifying slick-related phenomena/processes through their surface signatures and thereby, to improve the discrimination capabilities between slicks and other oceanic and atmospheric phenomena by taking into account information gained from satellite imagery quasi-simultaneously recorded at microwave, visible and IR wavelengths. The results of the two project years are summarized. Examples are given for the project’s web presentation, laboratory and field experiments, and of the analyses of various satellite data.

• 한국전자파학회논문지
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• 제22권9호
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• pp.858-867
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• 2011

본 논문은 수면의 기름 유출 유무, 유출된 기름의 분포 및 확산에 관한 정보를 실시간 원격으로 수집할 수있는 마이크로파 라디오미터의 개발에 관한 연구 내용을 기술한다. 먼저 수면에 유출된 두께 0~4 mm 범위의 기름층을 0.2 mm 이내의 오차로 원격 측정이 가능한 마이크로파 라디오미터의 개발 목표 성능을 달성하기 위해 요구되는 목표 사양을 도출하였으며, 이를 토대로 라디오미터 수신기를 설계하였다. 설계된 수신기의 시스템 이득과 잡음 지수의 budget 분석을 통해 설계의 적절성을 점검하였으며, 이 결과를 활용하여 수신 주파수 10.65 GHz, 대역폭 58 MHz로 47.3 dB의 시스템 이득과 0.46 K 이내의 수신 감도를 갖는 고이득, 고감도 수신기를 제작하였다. 제작된 수신기와 표준 혼 안테나로 구성된 마이크로파 라디오미터로 실제 수면 유막을 대상으로 실험한 결과, 0.13 mm 이내의 오차로 0~5 mm 범위의 유막 두께를 측정하는데 성공하여 목표 성능이 만족함을 검증하였다.

• Ocean and Polar Research
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• 제31권1호
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• pp.111-119
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• 2009

Biogenic surface films, which are often present in coastal areas, may enhance the signatures of hydrodynamic processes in microwave, optical, and infrared imagery. We analyzed ERS-1/2 Synthetic Aperture Radar (SAR) and Envisat Advanced Synthetic Aperture Radar (ASAR) images taken over the Japan/East Sea (JES). We focused on the appearance of the contrast SAR signatures, particularly the dark features of different scales caused by various oceanic and atmospheric phenomena. Spiral eddies of different scales were detected through surface film patterns both near the coast and in the open regions of the JES in warm and cold seasons. During field experiments carried out at the Pacific Oceanological Institute (POI) Marine Station 'Cape Shults' in Peter the Great Bay, the sea surface roughness characteristics were measured during the day and night using a developed polarization spectrophotometer and various digital cameras and systems of floats. The velocity of natural and artificial slicks was estimated using video and ADCP time series of tracers deployed on the sea surface. The slopes of gravity-capillary wave power spectra varied between .4 and .5. Surface currents in the natural and artificial slicks increased with the distance from the coast, varying between 4 and 40 cm/s. The contrast of biogenic and anthropogenic slicks detected on vertical and horizontal polarization images against the background varied over a wide range. SAR images and ancillary satellite and field data were processed and analyzed using specialized GIS for marine coastal areas.

• 한국해양환경ㆍ에너지학회지
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• 제2권2호
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• pp.38-48
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• 1999

1997년 4월 3일 거제도 남쪽에서 발생한 유류 오염 사고에 대하여 두개의 RADARSAT SAR 영상을 이용하여 분석하였다. 첫 번째 영상은 사고 발생 3일후 획득된 영상으로 extended low beam mode이고 두 번째 영상은 첫 번째 영상으로부터 12시간 후에 획득된 영상으로 standard beam mode이다. 두개의 영상에서는 유류 오염에 의한 활면(slikcs) 외에 섬이나 산의 바람 장애에 의하거나, 부분적으로 풍속이 낮은 해역, 그리고 자연막(natural film) 등에 의하여 유류오염과 유사한 활면(oil spill look-alikes)이 나타났는데 이를 검토하고 분석하였으며, 실제 거제도 주변의 양식장을 중심으로 자연막 형태의 활면이 SAR 영상에서 나타날 수 있는 가능성을 제시하였다. 두 개의 SAR 영상 분석 결과 사고 해역에서 유출된 기름이 남서 방향으로 이동 후 방향을 전환하여 동쪽으로 이동하는 양상이 관측되었으며 이는 현장 관측과도 일치하였다.

• 대한원격탐사학회지
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• 제15권1호
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• pp.61-71
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• 1999

한국 남쪽 해역에서 획득한 SAR 영상들로부터 해양 표면에 나타난 물리 현상등이 관측되었다. 1994년 10월 11일 제주도 남서쪽 연안에서의 ERS-1 SAR 영상에서는 남쪽으로부터의 너울 형태의 파랑이 관측되었으며 변도 전달함수를 적용하여 영상으로부터 파랑 스펙트럼을 구하였다. 1996년 8월 15일 제주도 북쪽 연안의 RADARSAT SAR 영상에서 관측된 내부파는 여름철의 성층화된 해수에서 조류 전류시 조류가 해저 지형과의 상호 작용에 의하여 발생한 것으로 추측되며 솔리톤의 형태를 띠고 있다. 1997년 4월 3일 거제도 부근에서 발생한 유류오염 사고 3일 후에 획득한 RADARSAT SAR 영상에서는 사고 당시 유출된 기름들이 잘 나타났으나 복잡한 해안 지형과 생화학적 요인에 의한 다른 Slicks들도 함께 나타났다.

• 한국해양공학회지
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• 제38권2호
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• pp.64-73
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• 2024

Oil spills pose significant threats to marine ecosystems, human health, socioeconomic aspects, and coastal communities. Accurate real-time predictions of oil slick transport along coastlines are paramount for quick preparedness and response efforts. This study used an open-source OpenOil numerical model to simulate the fate and trajectories of oil slicks released during the 2007 Hebei Spirit accident along the Korean coasts. Six combinations of input parameters, derived from a five-day met-ocean dataset incorporating various hydrodynamic, meteorological, and wave models, were investigated to determine the input variables that lead to the most reasonable results. The predictive performance of each combination was evaluated quantitatively by comparing the dimensions and matching rates between the simulated and observed oil slicks extracted from synthetic aperture radar (SAR) data on the ocean surface. The results show that the combination incorporating the Hybrid Coordinate Ocean Model (HYCOM) for hydrodynamic parameters exhibited more substantial agreement with the observed spill areas than Copernicus Marine Environment Monitoring Service (CMEMS), yielding up to 88% and 53% similarity, respectively, during a more than four-day oil transportation near Taean coasts. This study underscores the importance of integrating high-resolution met-ocean models into oil spill modeling efforts to enhance the predictive accuracy regarding oil spill dynamics and weathering processes.

• 한국항해학회지
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• 제11권2호
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• pp.33-52
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• 1987

The disasters of wet bound vessels have been more frequent than those of east bound ones on the sea routes of the North Pacific Ocean in winter season. M/V Hanjin-Inchon was also west bound in her missing voyage. The container vessel of 17, 676 gross tons, M/V Hanjin-Inchon owned by Hanjin Shipping Co.Ltd in Seoul Korea left seattle in west coast of U.S.A for Pusan , Korea on the 5th Feb., 1987 and sailed along the exact courses recommended by Ocean Routes until she reported her position and speed as 49-30N, 158-00E and 8 knots to her head office in Seoul by this ship's time 2200 hours on the 13th Feb., 1987. The above message turned out to be last message from her because she had been missing since then leaving no message but only two life boats of her name, three containers cases, large scale of oil slicks and the corpse of her 3rd mate drifting on the sea near the position reported by her last message.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.985-988
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• 2006

Oil spills cause huge material damage. Oil and oil products spills may occur at any stage of the offshore oil production and transportation cycle. Therefore taking into account the current trends of oil production, the task of creating a system for shelf and tank fleet monitoring becomes very crucial today. This document describes the technology being implemented to improve oil spill monitoring and surveillance, to ensure SAR data fast acquisition and processing and to develop geographic information systems in support of spill response decision making. The results of technology implementation are also presented below.

• 한국전산유체공학회지
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• 제21권3호
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• pp.31-38
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• 2016

The FDS-HCIB method is expanded to simulate water-oil-air flows around oil booms under relative motion, which is intended to increase the thickness of contained oil. The FDS scheme captures discontinuity in the density field and abrupt change of the tangential velocity across an interface without smearing. The HCIB method handles relative motions of thin oil booms with ease. To validate the developed FDS-HCIB code for water-oil-air flow around a moving body, the computed results are compared with the reported experimental results on the shape, length, and thickness of the oil slicks under towing. It is observed that the increase in pressure field between two barriers lifts the oil slick and the interfacial wave propagates and reflects as one barrier gets closer to the other barrier.