• Title, Summary, Keyword: Sediment Quality

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Application of a Sediment Quality Index to the Masan Bay, Korea

  • Shim, Won-Joon;Hong, Sang-Hee
    • Ocean and Polar Research
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    • v.29 no.4
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    • pp.367-378
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    • 2007
  • A sediment quality index (SQI) and a mean sediment quality guideline quotient (M-SQGQ) were applied for the assessment of sediment quality in Masan Bay, Korea where metals and organic pollutants are of concern. The SQI was calculated by two functions, 'scope' (the number of variables that do not meet guideline objective) and 'amplitude' (the magnitude by which variables exceed guideline objective), with six different sediment quality guideline values from Canada, USA and Australia/New Zealand. Categorization of sediment quality was on the basis of SQI scores. The SQI values were compared with six guideline values applied as well as with the M-SQGQs. The SQI values were severely influenced by a few variables of high exceedance in the degree of non-compliance. The SQI values were very dependent on both the numbers and values of guideline variables used in index caluculation. Nevertheless, the SQI could provide integrated and simplified information from a large number of chemical data set. It is required to further evaluate protocols and guideline applied for deriving SQI and to compare it with field based sediment toxicity test and ecosystem integrity.

Study on the Sediment Quality in Bottom Water (I) (수 저층의 저질 조사 (I) - 저질 조사의 중요성과 분석에 관하여 -)

  • Kim, Do-Hee
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.13 no.1
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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.

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Analysis of Water Quality Pollutants Proximated to sediment in Lake (호소내 퇴적물의 근접도에 따른 수질오염물질 분석(I) - COD, T-N, T-P, pH -)

  • Park, Sun-Ku;Yang, Young-Mo
    • Analytical Science and Technology
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    • v.14 no.3
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    • pp.238-243
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    • 2001
  • The study was carried out to analysis of the pollutant $COD_{Mn}$, T-N, T-P for water quality proximated to sediment in lake of K river basin. water extracted from sediment showed higher $COD_{Mn}$, T-N, T-P datas than water proximated to sediment. Also, water proximated to sediment and water 5-10cm proximated to sediment showed the following data : $COD_{Mn}$, 1.2~1.9mg/L, T-N, 1.3~6.2mg/L, TP, 0.05~0.26mg/L, respectively. From this results, we have known the fact that the pollution degree of sediment have an effect on the water quality in lake and stream.

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Elution Behavior of Nutrient Salts from Sediment and its Impact on Water Bodies

  • Wada, Keiko;Haruki, Fumio;Ishita, Kyoji;Okada, Yuki
    • Environmental Engineering Research
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    • v.15 no.1
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    • pp.41-48
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    • 2010
  • This paper describes the influence of nutrient salts eluted from the bottom of a closed water area where polluted sediment has been deposited by inflowing river water. The elution pattern was monitored at our experimental facility. Both the sediment pore water and water above the bottom were sampled using a dialyzer sampler (peeper). The pore water of the eutrophicated sediment contained a large amount of nutrient salts, and the effect of elution was confined to a limited area of the bottom surface. The nutrient concentration of the sediment pore water was closely related to both the water temperature and dissolved oxygen (DO) concentration. The eluted nutrients from the sediment provided a source for phytoplankton and algae growth. This experimental data indicated that the water quality of the surface was not directly connected to the eluted nutrient salts, while it was indirectly affected by the total ecosystem, including all the organisms within an area and their environment.

Quantitative Assessment of the Effects of Sediment Dredging on Water Quality in Masan Bay using Ecosystem Model (생태계 모델을 이용한 마산만 퇴적물 준설이 수질에 미치는 영향 정량평가)

  • Kim, Jin-Ho;Kim, Dong-Myung
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.22 no.5
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    • pp.521-526
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    • 2016
  • Sediment dredging can permanently remove pollutants from an aquatic ecosystem, which is considered an effective approach to aquatic ecosystem restoration. In this study, we quantified the effects of sediment dredging on water quality in Masan Bay by calculation of oxygen demanding rate. We applied ecosystem model including water and sediment quality module in Masan Bay. The results showed that the increase of calculated oxygen demanding rate is significant due to sediment dredging of both inner part and outer part of Masan Bay. On the other hand, the increase is gradual due to decrease of anthropogenic load. It meant sediment dredging can improve water quality of Masan Bay more. Using correlation equation between oxygen demanding rate and sediment oxygen demand, we calculated that the area of sediment dredging which is equal to the effects of 10 % reduction of anthropogenic load. It is $1.68km^2$ in inner part and $3.15km^2$ in outer part of the Masan Bay. This Meant that to improve water quality of Masan Bay, sediment dredging in inner part is efficient method.

A Study on Release Characteristics of Sediment and its Impacts on Water Quality in Daecheong Dam Reservoir (대청댐 저수지 퇴적물의 용출특성과 수질에 미치는 영향에 관한 연구)

  • Lee, Yo-Sang;Lee, Kyeong-Sik
    • Journal of Environmental Impact Assessment
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    • v.9 no.2
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    • pp.99-107
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    • 2000
  • In order to solve water quality problem of domestic dam reservoir, many projects have been performed in a point of view to restoration of water quality. This study was carried out to evaluate the effect of release from sediment on water quality and release characteristics. Daecheong dam reservoir was investigated for two years, from 1998 to 1999. The nutrient release rates of Daecheong reservoir is less than foreign eutrophic reservoir at anoxic condition. For the evaluation of the effect of nutrient release on water quality, internal and external loading was calculated at Daecheong reservoir. As total phosphorus loading from sediment is calculated 9.3 ton/yr and inflow loading from Daecheong reservoir watershed 118 ton/yr, internal loading shows the portion of 7.88% to external loading. At this study, because sampling point was choosed at the point where much sediment is accumulated, experimental result is more than average release rates. Because Daecheong reservoir shows complete thermal stratification and anoxic condition below 30m from water surface in summer seasons, released phosphorus from sediment can not transfer to epilimnion and eventually resettles. Therefore sediment has insignificant impacts on water quality on Daecheong dam reservoir.

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Removal of Cochlodinium polykrikoides using a novel material produced from sediment - A field study

  • Song, Young-Chae;Sivakumar, S.;Ko, Sung-Chung;Hwang, Eung-Ju;Jo, Q-Tae
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • pp.200-201
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    • 2007
  • The present study was conducted in three fields at Namhae to examine the removal efficiency of organic free, heavy metal immobilized sediment on Cochlodinium polykrikoidesand and on sea water quality. The present study results concluded that removal efficiency was depends on the initial number of red tide cells. There was no drastic change in the sea water quality after sediment spray. For the comparison of effectiveness of betonite, zeolite and lime were mixed with sediment did not show any marked difference in removal. Finally, the present study evaluated 50g/$m^{2}$ sediment is sufficient to remove 100% cells density, even though various environmental factors are interfering the mechanism.

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A Study on Effects of Hydraulic Structure on River Environment(II) : Water Quality and Ecological Characteristics (수공구조물이 하천환경에 미치는 영향에 관한 연구(II) : 수질 및 생태학적특성)

  • 안승섭;최윤영;이수식
    • Journal of Environmental Science International
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    • v.11 no.4
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    • pp.309-317
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    • 2002
  • In this study, water protection reservoir is selected as the target which is located at the estuary of Taehwa river to analyze and examine the effects of hydraulic structure on river environment. This study examined the water quality variation characteristics among many effects of hydraulic structure on river environment before and after removal of the sediment protection reservoir when low flow is yielded. This study aims at the definition of factors which cause the change of ecological environment of river due to the effects of the sediment protection reservoir, and the proposal of the direction of environmental friendly river space development through the comparison of stream variation conditions(depth, velocity, and etc.) and riverbed variation characteristics with ecological depth condition of Taehwa-river's channel for each representative species of fish and examination those. Firstly, from the examination result of water quality when low flow is yielded before and after removal of the sediment protection reservoir for problems about water quality of river due to flow amount decrease in river, it is found that DO decreases about 0.78~0.86ppm at the lower stream of Myeongchon-gyo, and BOD decreases about 0.06~0.24ppm from right upper stream to the direction of estuary when the sediment protection reservoir is removed. It is known from the above that there is some improvement of water quality from the lower stream of Taehwa-gyo to the estuary in case of removal the sediment protection reservoir. Nextly, it is thought that the effects on ecosystem due to water depth and draw down in channel is not serious on the basis of the examination of water quality analysis result according to removal of sediment protection reservoir and hydraulic depths for reservation of ecosystem, these are 10~40cm for breeding season, 10~50cm for fry period, and 10~100cm for adult period of the representative species of fish in Korea.

An Experimental Study on the Pond Sediment and Water Quality Purification using Oxygen Solubilization Device(OSD) System (산소용해수를 이용한 호소 저질 및 수질개선에 관한 실험적 연구)

  • Kim, Young-Taek;Bae, Yoon-Sun;Roh, Eun-Kyung;Park, Chul-Hwi;Lee, Yeon-Ku
    • Journal of Korean Society of Water and Wastewater
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    • v.20 no.1
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    • pp.94-103
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    • 2006
  • The pollution in closing water can be caused by not only artificial factor like sewage but also natural factor like elution from sediment. In this study we analyzed Sediment Oxygen Demand (SOD) for verification of sediment purification effect and sediment elution experiment as well as general items like COD, TN, TP, SS to complement and assess the effect of sediment and water quality. The experiment result showed that the release rate of OSD system were 4 times and 3 times as large as control for P and Fe respectively. SOD for operated OSD system and control were $12.18gO_2{\cdot}m^{-2}{\cdot}d^{-1}$ and $47.95gO_2{\cdot}m^{-2}{\cdot}d^{-1}$. From water qualities analyzed by COD, TN, TP, SS, chlorophyll-a, the removal efficiency increase of TN, TP, chlorophyll-a and COD were about 10~20%, 40~50% and 10% respectively. In conclusion, OSD can contribute to improvement of both the waterbody and the sediment environment effectively.

Distribution of the Organic Contents in Reservoir Sediment (호소 퇴적물의 유기물 분포)

  • Hwang, Jong Yeon;Han, Eui Jung;Yu, Soon Ju;Yoon, Young Sam;Cheon, Se Eug;Kim, Tae Keun
    • Journal of Environmental Impact Assessment
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    • v.8 no.2
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    • pp.95-107
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    • 1999
  • The organic contents of reservoir sediment can offer a good indicator to events in history of lake life. Reservoir sediment have many information of the past and future fingerprint about development direction of life cycle in biological animals. So, in this study we made an effort to know the distribution of organic contents in Daecheong reservoir sediment. Items for this investigations are such as follows: Loss on ignition, COD, Organic carbon, TN, TP, heavy metal contents, Loss on ignitions were determined in 6.44~15.91% and COD were determined in 1.606~6.859%, organic carbon in 1,077~3.743%. Contents of TP and TN were in the range of 0.083~0.757%, and 0.645~0.926%, respectively.

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