• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2012.06a
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• pp.167-168
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• 2012

본 연구는 해양퇴적물 준설 중 해양의 탁도와 2차오염을 유발하는 미세한 입자의 퇴적물을 생물학적으로 처리하는 친환경 정화기술로 유용미생물제제(BM-S-1)를 투여한 Lab Scale의 실험장치를 이용하여 기초 실험을 수행하였다. 유용미생물제제(BM-S-1)가 우점되어 있는 Lab Scale 실험장치를 운전하여 유기물 정량분석방법인 COD, T-N, T-P를 분석해본 결과 모든 항목이 약 98% 이상 처리됨을 확인할 수 있었다. 특히 본 실험대상물질인 해양퇴적물은 고농도의 염분이 함유되어 있어 기존기술만으로는 생물학적 처리가 어려웠지만, 본 연구에서 사용된 유용미생물제제(BM-S-1)은 염분이 함유된 오염 퇴적물에서도 효과적인 생물학적 처리가 가능함을 확인 할 수 있었다. 따라서 준설 시 2차오염을 유발시키는 미세한 입자의 해양퇴적물을 본 공법으로 처리하여 방류할 시 친환경적인 준설이 이루어질 수 있으며 이 때 처리되어 배출되는 미세토양은 재이용 가능하다고 판단된다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.5
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• pp.584-593
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• 2021

The sediment makes up the sea floor and plays an important role as a habitats for living things in the sea. However, pollution of coastal sediment due to internal and external factors such as inflow of contaminants from land and self-pollution becoming more serious, the needs for management of sediment that play an important role in ecology, is increasing. In particular, the review and evaluation of the effects of sediment in marine development projects including reclamation and dredging, have significance in terms of proactive protection and management of surrounding ecosystems. This study proposed the improvement measures for marine sediment management standards on the sea area utilization consultation for the development of public water. For the purpose, The evaluation and management standards of domestic and overseas marine sediments were reviewed and compared. The sediment environment guidelines under the Marine Environment Management Act of Korea were reviewed. Accordingly, the cases of Canada and NOAA, which have various evaluation standards consist of comprehensive factors, were analyzed. For analysis of operational cases, the port and fishing port development projects for the last five years (2016-2020) that are considered to have the greatest impact on sediments among the sea area use consultations were also reviewed. Finally, this study suggested that the assessment factors for ecological hazards and potential human risks should be considered in the sediment environmental standards in the sea area utilization consultation system.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.14 no.3
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• pp.171-180
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• 2009

Based on the constituent analysis of sediments near Dok Island, the origin and sedimentary facies were Investigated. The sediments are mainly from originated from volcanic and volcaniclastic rock fragments derived from Dok Island and carbonate sediments formed by a variety of shallow-dwelling organisms that secreted calcareous skeletons. Carbonate producers include mollusks (bivalves and gastropods), encrusting & branching bryozoans, encrusting & segmented red algae, worm tubes, barnacles, diatoms, sponge spicules and echinoderm fragments. The distribution and relative amount of these constituents are basically dependent upon water depth and grain size even though local variations can be observed within the same depth interval. Five sedimentary facies can be divided: nearshore facies (<20 m), neritic facies ($20{\sim}100m$), upper transitional facies ($100{\sim}200m$), lower transitional facies ($200{\sim}700m$), and hemipelagic facies (>700 m). The sediments that were sampled below the water depth of 2,000 m still contain a significant amount of carbonates (ca. $10{\sim}20%$), implying that the carbonate compensation depth in the East Sea may well exceed this water depth.

• Journal of the Korean Society for Marine Environment & Energy
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• v.19 no.4
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• pp.247-258
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• 2016

Physical and acoustic properties of sediment on the southwestern Taean Penisula, the Yellow Sea, were studied using eight piston cores. The sediments in the study area are largely composed of sand which has been deposited with sea-level change after LGM(Last Glacial Maximum). After the sea-level rise, fine-grained sediments discharged from Keum River and neighboring coast area were deposited as muddy sand or sandy mud. Results of these sedimentary environment in this area, the texture of sediments are different from place to place with variable horizontal and vertical distribution of physical and acoustic properties. Correlations among the physical, geoacoustic properties, and mean grain size show slight deviations from those of the South Sea in spite of similar pattern. This is probably due to the differences in sedimentary environment, mineral composition, and measurement system.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1992.08a
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• pp.172-172
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• 1992

미세퇴적물 이동연구는 최근 실험실 실험 또는 현장 자료에 의해 많은 진전을 이루어 왔으나, 아직은 미세, 점착성 퇴적물의 복잡한 과정을 다 고려한 신뢰성 있는 이동예측 수치모델의 개발에 충분한 지식이 축적되어 있지 않다. 수치모델에 의한 예측 기술을 계발하는데 있어서 해결해야 할 중요한 문제는 해저면에서의 퇴적물의 수송량을 정량화하는 일로서 난류하에서 점착성 퇴적물의 복잡한 퇴적 관련 현상에 관한 실험적 연구에 의해 각종 파라미터의 정량화가 요구된다.(중략)

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 2003.08a
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• pp.222-226
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• 2003

대부분의 경우에 하구의 미세-점착성 퇴적물은 보통 무기성 광물과 유기물 및 생화학물의 혼합체이며, 광물 입자들은 주로 점토와 실트로 구성되어 있다. 이러한 혼합체의 침식특성은 사질성 퇴적물과는 달리 입자간의 응집현상에 의한 의해 크게 영향을 받으며, 응집강도는 광물질 구성, 입경분포, 유기물 함량 등으로 묘사되는 퇴적물 자체의 물리ㆍ화학적 기본특성에 따라 크게 변화하고 (Mea, 1986), 특히 저면 퇴적물의 침식 여부는 흐름 전단응력에 의한 저면퇴적물의 저항력 즉, 저면전단강도의 상대적 크기의 차이에 좌우되므로, 그 침식 특성은 저면전단강도 흑은 저면밀도로 묘사되는 저면특성에 따라 크게 변화한다(황규남 등, 2003). 또한 각 해역마다 저면 퇴적물은 퇴적물 공급원, 수동학적 조건, 생태학적 조건 등이 모두 다른 상태에서 형성된 퇴적층이므로, 저면 퇴적물의 기본특성 및 저면특성은 "site- specific" 한 성격을 갖는다. (중략)

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.4 no.4
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• pp.312-322
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• 1999

We have studied both submarine morphology and sediment characteristics of waste disposal sites in the southwestern Ulleung Basin, East Sea, as part of a marine environmental preservation program. The Jung waste disposal site in the outer shelf is characterized by the thick accumulation of coarse-grained palimpsest sediments and fine-grained sediments from various sources. The Byung waste disposal site in the continental slope is generally characterized by hemipelagic muds with intermittent sandy sediments originated from the outer shelf and upper slope. The hemipelagic sediments, draping the seafloor, consist of fluidized muds. The core sediments show numerous bioturbation structures which cause vertical mixing of sediments. The surface sediments can be divided into four sand types (S-1, S-2, S-3, and S-4) and two mud types (M-1 and M-2) based on relative contents of reworked coarse-grained palimpsest sediments and fine-grained sediments. sorting and heavy mineral contents. The sands are probably relict sediments reworked during high-energy conditions such as typoon or storm. On the other hand, the muds were originated from various sources such as recent input from the Nakdong River, reworked fine-grained sediment from the shelf or suspended particulate matter from the East Sea Warm Current.

• 한국해양학회지
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• v.28 no.4
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• pp.259-271
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• 1993

The distributions of bottom sediments and the depositional processes on the continental shelves of Korean Seas are interpreted. Generally the continental shelf sediments can be classified into the sand-facies and mud-facies, showing the typical bimodal size distributions Most of the sandy and gravelly sediments on the outer shelf floor are interpreted as "relict" sediments that were deposited during the last glacial times when the sea level was lower than the present. On the other hand the muddy sediments on the inner shelf area are interpreted as "recent" sediments that are deposited under the present environment conditions. It is understood that most of the fine materials cannot escape the inner shelf area due to the strong tidal and coastal fronts, and are transported eastward from the West Sea along the southern coast of Korean Peninsula. The dark-colored muddy sediments in the Hupo Basin of the East Sea are, however, considered to be "relict" sediments. In the midshelf area fine materials are mixed with the relict coarse sediments, and some of the relict sediments are continuously reworked under the present environmental conditions forming the "palimpsest" sediments.

• Journal of Navigation and Port Research
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• v.38 no.6
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• pp.655-661
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• 2014

In this study, stabilization treatment of heavy metals such as Ni, Cu, Pb, and Zn in contaminated marine sediment was achieved using bentonite. Stabilization experiment was accomplished by wet-curing with bentonite for 150 days. From the sequential extraction results of heavy metals, it was observed that the easily extractable fraction (exchangeable, carbonate, and oxides forms) of Ni, Cu, Pb, and Zn in a treated sediment decreased to 8.5%, 5.6%, 19.2%, and 28.2%, respectively, compared with untreated sediment. Moreover, the TCLP(Toxicity Characteristic Leaching Procedure) results evaluating efficiency of extraction reduction of heavy metals showed that extraction of heavy metals reduced drastically to 95.7%, 96.8%, 99.2%, 85.9% for Ni, Cu, Pb, and Zn by stabilization when compared to untreated sediment. From these results, we can confirm that bentonite as a capping material exhibits good stabilization of heavy metals in contaminated marine sediment.

• 한국해양학회지
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• v.29 no.4
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• pp.357-365
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• 1994

The sediments on the continental shelf off the west coast (middle part) of Korea are divided into northern sandy deposits and southern muddy sediments, respectively. The sandy sediments consist dominantly of quartz and feldspar grains, representing mature-stage sediment in composition. Further-more, the presence of iron-stained quartz grain and glauconite does indicate that the sediments are similar to the relict sediments on the outer shelf of Yellow Sea and East China Sea. These sandy sediments are interpreted as a basal sands that were deposited during the transgression period due to sea-level rise after to last glacial maximum (LGM). The tidal deposits in the Namyang Bay, the west coast of Korea are divided vertically into the upper layer of muddy sediments and the lower layer of sandy sediments. the upper layer sediments contain abundant rock fragments, and are interpreted as the modern tetragenous sediments. The lower layer sediments, on the other hand, are rich in quartz and feldspar grains, representing high index of sediment maturity ratio. the lower layer sandy deposits show the presence of iron-stained.