• Proceedings of KOSOMES biannual meeting
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• 2006.11a
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• pp.271-275
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• 2006

여수 하수처리장 하수처리 방류수가 배출구 인근해역에 미칠 수 있는 영향정도를 파악하기 위하여 해양수질 및 저질 환경을 조사하였다. 조사는 총 30개 지점에서 수질과 저질의 일반항목과 영양염류에 대하여 실시하였다. 조사시기는 2005년 9월 3일 (하계), 2005년 11월 20일(추계), 2006년 2월 13일 (동계), 2006년 5월 28일 (춘계) 에 4 계절에 걸쳐 밀물시와 썰물시에 현장 조사를 실시하였다. 배출수는 해양수질환경의 특성을 통해 추정한 결과 직접영향권은 0.5km, 간접 영향권은 반경 약 2km까지로 추정되었다. 저질의 결과를 보면 산 휘발성 황화물의 농도가 많은 해역에서 저질의 오염기준을 초과하는 동 오염된 저질의 특성을 보였으며, 산 휘발성 황화물과 화학적 산소요구량의 분포는 니질 퇴적상이 두드러지게 나타나는 배출구 동측과 돌산도 남동쪽, 돌산도 서측과 대경도 동측사이에 위치한 해역에서는 대체적으로 높은 값들을 보이고 있으며, 조립질 퇴적상이 주로 분포하고 있는 배출구와 국동항사이의 수로에서는 대체적으로 낮은 분포를 나타내었다.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.221-222
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• 2000

수산환경에 있어 저질성상은 탁도, pH 및 영양염류 등과 같은 수질환경에 영향을 미치며, 새우류의 자연서식지 및 양식장에서는 이들의 분포 및 먹이활동에 영향을 미친다 (Ruello, 1973; Huguenin and Colt, 1989). 대하는 유생기의 발달단계가 진행됨에 따라 천천히 저질 속으로 잠복하기 시작하며, 치하 및 성체시기에는 주야간에 걸쳐 저질과 수중을 오가며 생활하는 습성을 가지고 있다. (중략)

• Journal of the Korean Society of Marine Environment & Safety
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• v.13 no.1 s.28
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• pp.93-102
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• 2007

Particle materials sink in bottom and dissolved inorganic substances release from sediment and many kinds of materials continuously exchange in sediment and water column as well as transfer and transformation in sediment. The study of sediment quality means the state of sediment pollution relation of the water quality, sediment biota, materials fluxes between sediment and water column, transformation of materials in sediment is being important in recent. The state of sediment quality imply that the history of water pollution for long time, because the sediment quality does not change temporally. The sediment quality of bottom water can be used as a good indicator of pollution at present and in future. The major index of sediment qualities are the content of nutrients and hazard materials such as metals, Ignition Loss (IL), Total Sulfur (TS), Oxidation Reduction Potential (ORP), sediment COD, color, odor and the release of nutrients from sediment. However, there are some arguments between researchers about compare to estimation of sediment quality and sampling and analysis of sediment. In this study, I will introduce the method of sediment sampling, analyzing and estimating of the sediment pollution.

• Proceedings of KOSOMES biannual meeting
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• 2003.05a
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• pp.201-204
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• 2003

• Proceedings of KOSOMES biannual meeting
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• 2009.06a
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• pp.27-27
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• 2009

• Journal of Marine Life Science
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• v.3 no.1
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• pp.38-43
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• 2018

The polychaetes are the dominant species in the benthic communities, and play an important role in improving the sediment quality through the action of ingesting organic materials. We evaluated the improvement ability of rockworm Marphysa sanguinea for the removal of organic matter. We used the three types of sediment (S1: coarse sand, S2: fine sand, S3: muddy sand), and analyzed TOC of seawater and sediment. Rockworm was effective in eliminating organic matter in the three types of sediment and the larger the particle, the higher the removal rate. Removal ability of rockworm for organic matter in sediment were calculated with 3.9856 ppm g^-1d^-1 in coarse sand, 2.8021 ppm g^-1d^-1 in fine sand, and 28.1142 ppm g^-1d^-1 in muddy sand. The results show that rockworm contributes to the removal of organic matter in the various sediment types.

• Proceedings of KOSOMES biannual meeting
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• 2006.05a
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• pp.129-135
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• 2006

This study was performed to characterize the seasonal variation of water quality and sediment environment from May, 2004 to February, 2006 in 21 stations of Gwangyang bay. Gawngyang bay is located in the middle of south coast of Korea and semi-dosed with Yeosu peninsula, Gwangyang-city and Namhea-do. Water quality at the west coast of Myo-do were highly deteriorated than other stations. At summer season(July 2005), the concentration of the most analytical items were highly detected than other seasons and the lowest concentration was at the winter season(January 2005, February 2006). Especially, DIP and TP were highly detected around the coast of Yeosu industrial complex. N/P ratio were higher than 16 of Redfield ratio in the spring(May 2005) and winter(February 2006) at the surface layer. While at other seasons and most stations were lower than 16 of Redfield ratio. In the survey of sediment environment, ignition loss(IL), chemical oxygen demand(COD) and acid volatile sulfide(AVS) were in the range of $2.51\sim22.10%,\;2.65\sim48.41mg/g-dry\;and\;0.01\sim8.95mg/g-dry$, respectively. COD in surface sediment was highest at summer season AVS was highest at autumn. In sediment, the corelationship coefficients between COD and IL, COD and AVS were 0.65 and 0.44, respectively.

• Journal of the Korean Society for Marine Environment & Energy
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• v.4 no.2
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• pp.3-14
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• 2001

In order to predict nutrient circulation in Hakata bay, we have developed an ecosystem model named the Sediment-Water Ecological Model (SWEM). The model, consisting of two sub-models with hydrodynamic and biological models, simulates the circulation process of nutrient between water column and sediment, such as nutrient regeneration from sediments as well as ecological structures on the growth of phytoplankton and zooplankton. This model was applied to prevent eutrophication in Hakata bay, located in western Japan. The calculated results of the tidal currents by the hydrodynamic model showed good agreement with the observed currents. Moreover, SWEM simulated reasonably well the seasonal variations of water quality, and reproduced spatial heterogeneity of water quality in the bay, observed in the field. According to the simulation of phosphorus circulation at the head of the bay, it was predicted that the regeneration process of phosphorus across the sediment-water interface had a strong influence on the water quality of the bay.

• Journal of the Korean Society for Marine Environment & Energy
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• v.17 no.1
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• pp.1-7
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• 2014

This paper aims to explain the safety assessment and remediation mechanism of Granulated Coal Ash (GCA) as a material for the remediation of coastal sediments and to evaluate the improvement of the sediment in Kaita Bay, where GCA was applied. The concentrations of heavy metal contained in GCA and the dissolved amounts of heavy metal from GCA satisfied the criteria for soil and water pollution in Japan. The mechanisms on the remediation of coastal sediments using GCA is summarized as follows; (1) removal of phosphate and hydrogen sulfide (2) neutralization of acidic sediment (3) oxidation of reductive sediment (4) increase of water permeability (5) increase of soil strength (6) material for a base of seagrass. From the results obtained from the field experiment carried out in Kaita Bay, it was clarified that GCA is a promizing material for remediation of coastal sediment. This remediation technology can contribute to promote waste reduction in society and to decrease cost of coastal sediment remediation by applying GCA in other polluted coastal areas.

• Journal of the Korean Society of Marine Environment & Safety
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• v.16 no.1
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• pp.43-48
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• 2010

This study was designed to evaluate whether the addition of sediment improvements with natural materials to water tanks influenced the hematologic properties and muscle glycogen content of the blood cockle, Tegillarca granosa under laboratory conditions. Following a 10-d matured period of sediment improvements, blood cockles were subjected to 4 groups (0, 100, 300, $800\;g/m^2$) of sediment improvements for 14-d Only one individual died at $800g/m^2$ after 48-h Whole blood, hematocrit value and hemoglobin concentration of blood cockle were changed little by sediment improvements, however, both glucose and glycogen were increased more compared with those of the control groups.