• 한국농공학회지
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• 제38권2호
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• pp.97-107
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• 1996

This study was performed to derive the formula of sediment yield and predict the sediment elevation for fresh desalted reservoirs. Data analyzed was from 3 fresh desalted reservoirs of Sapkyo, Asan, and Namyang. Average sediment yield calculated from the sediment survey data was $279m^3/km^2/$ year for Sapkyo lake, $523m^3/km^2/$ year for Namyang lake, and $190m^3/km^2/$ year for Asan lake. The trap efficiency for Sapkyo lake was 63%. The formula of sediment yield was derived as $Q_s=6,461{\times}A{^-0.44}$ for fresh desalted reservoir. Sediment yield in fresh desalted reservoirs was much higher than that in inland reservoirs located in the same watershed, because of long trap time in fresh desalted reservoirs.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2009년도 세계 도시지반공학 심포지엄
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• pp.1057-1064
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• 2009

Since the global warming causes debris flow damage has increased in Kangwon Area, Sediment control dam have increasingly founded to protect the damage. In spite of the realities design methods are well not established to determine type of the dam, design parameters and maintenance. Through comparison for design methods to sediment control dam in Korea, it raised some points to improve to correspond with realities. In addition, it pointed that some issues for the sediment control dams in Kangwon Area. Those are shown that unclear positions of the dams, unremoval of sediment, occurrence of seepage under the dams and uninstallation of roads to remove sediment. In addition, the countermeasure for the issues are proposed.

• Environmental Engineering Research
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• 제15권1호
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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.

• 한국양식학회지
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• 제12권3호
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• pp.193-196
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• 1999

In order to obtain the basic data for the effective seed production of Ureshis unicinctus sediment preference, burrow shape and burrowing depth in sediment were investigated in the laboratory. The highest valus in both sediment preference and burrowing rate of U. unicinctus were shown at fine and (0.11~0.50mm in the mean diameter). U. unicinctus made various types of burrows, such as J, L, S and U shapes. Generally only one individual inhabits in burrow with head-up.

• 한국해안해양공학회:학술대회논문집
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• 한국해안해양공학회 1993년도 정기학술강연회 발표논문 초록집
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• pp.98-100
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• 1993

When we want to reproduce transport of sediment in the fields in a laboratory, we have to establish a similitude law. A similitude law is necessary when sediment transport of field is reproduced in a laboratory. When we apply our knowledge about sediment transport obtained in the laboratory to predict sediment transport in the field, we can apply Froudian law to a fluid motion that becomes agitation agency and transporting flow of sediment movement. (omitted)

• 한국식품영양과학회지
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• 제45권6호
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• pp.865-871
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• 2016

본 연구에서는 렌틸콩 앙금을 만들어 일반성분을 분석하고, 렌틸콩 앙금의 비율(0%, 25%, 50%, 75%)을 다르게 첨가하여 양갱을 제조한 후, 수분함량, pH, 당도, 색도, 조직감, 총 폴리페놀 함량, DPPH 라디칼 소거 활성을 평가하고 기호도 평가를 시행하였다. 렌틸콩 앙금의 수분함량은 15.63%, 조단백질은 17.31%, 조회분은 0.92%, 조지방은 0.31%, 건조수율은 54.25%를 나타냈다. 렌틸콩 앙금을 첨가한 양갱의 수분함량은 렌틸콩 앙금 첨가량이 증가할수록 42.83~65.17 %로 유의적으로 증가했고 당도는 3.40에서 1.20으로 감소하였으나, pH는 유의적인 차이를 보이지 않았다. 색도는 렌틸콩 앙금 첨가량이 증가할수록 명도를 나타내는 L값은 유의적으로 감소하였고, 적색도를 나타내는 a값과 황색도를 나타내는 b값은 유의적으로 증가하였다. 조직감은 렌틸콩앙금의 첨가량이 증가함에 따라 탄력성, 검성, 씹힘성이 유의적으로 감소하는 경향을 보였으며 경도와 응집성은 유의적인 차이를 보이지 않았다. 총 폴리페놀 함량과 DPPH 라디칼 소거 활성은 렌틸콩 앙금 첨가량이 증가할수록 유의적으로 높은 값을 보였다. 기호도 평가 결과 맛, 질감, 전체적인 기호도에서 25% 첨가군이 유의적으로 높은 점수를 받았다. 이상의 결과를 종합하여 볼 때 렌틸콩 앙금을 25% 첨가하여 양갱을 제조한다면 양갱의 관능적 품질을 최대한 유지하면서 기능성 식품으로 소비자의 욕구를 충족시킬 수 있을 것이다.

• 상하수도학회지
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• 제20권1호
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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.

• 한국환경과학회지
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• 제3권4호
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• pp.409-416
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• 1994

This study was Performed to evaluate the contents of heavy metals in water, sediment and soil of the 7 different sampling points along the West Nakdong river, The results were as follows: the concentrations of Zn, p, Pb, Cd, Mn, Cu and As in the sediment were 197.48, 551.85, 67.01, 2.54, 491.39, 42.95 and 10.52ppm, respectively. The concentrations of Zn, p, Pb, Cd, Mn, Cu and As in the soil was 83.32, 482.89, 17.15, 1.02, 226.02, 26.15 and 7.29ppm, respectively. The concentration ratios of heavy metals In the water to the sediment were 593 - 12700 (Cd >> Cu > Zn > Mn > As > Pb) and that of the water to the soil were 152 - 5100 (Cu > Cd > Zn > Mn > As >Pb). The correlation coefficients of Cu and Pb weve high among the water, sediment and soil. Because the accumulation amounts of heavy metal in the sediment were high, the concentration of heavy metals in the sediment was higher than in soil. The correlation coefficient of heavy metals among water, sediment and soil was high (0.79 - 0.95). Key Words Distribution Characteristics, heavy metals, West Nakdong River.

• 환경생물
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• 제21권4호
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• pp.415-421
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• 2003

Chlorophyll-a and its degradation products (pheopigment) contained in the sediment were determined to evaluate the eutrophication status in the downstream of Nakdong River. The chlorophyll-a and pheopigment concentrations of sediment ranged 11-646 mg $\mu \textrm m^{-2}$ (mean 172 mg $\mu \textrm m^{-2}$) and 48-1,564 mg $\mu \textrm m^{-2}$ (mean 454 mg $\mu \textrm m^{-2}$) over 11 sampling stations of the Nakdong River. The chloropigment concentrations in this local area were higher than other values reported previously and this river waters showed hypertrophic status in view of sedimentary chloropigment. Total chloropigment standing crops of sediment, which are the residuals after the longterm degradation, were 2.2-3.6 fold higher than chlorophyll-$\alpha$ contents of overlying water. The amounts of chloropigments of sediment suggest a large contribution of phytoplankton to the sediment. While chloropigment standing crops are evaluated with organic-C and nitrogen contents, the algal contribution to the carbon and nitrogen pool of the sediment were estimated to be approximately 30% and 40%, respectively.

• 대한토목학회논문집
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• 제2권2호
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• pp.19-28
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• 1982

하구(河口), 항만(港灣) 등에서 응집성(凝集性) 및 비응집성토사(非凝集性土砂)의 이송추정(移送推定)을 위한 이차원토사이송추정모형(二次元土砂移送推定模型)이 개발되었으며 이 모형(模型)은 흐름에 의한 순환모형(循環模型)과 토사이송모형(土砂移送模型)으로 구성된다. 토사이송모형(土砂移送模型)은 이차원확산(二次元擴散) 방정식(方程式)과 연속방정식(連續方程式)으로 이루어진다. 해(解)는 Galerkin 유한요소법(有限尿素法)과 이단계(二段階) Lax-Wendroff 방법(方法)에 의하였다. 이차원수로(二次元水路)의 상이(相異)한 조건하에서 순환(循環)과 토사이송(土砂移送)에 관하여 수치모의(數値模擬) 되었으며 부산항(釜山港)에 적용하여 얻어진 결과중에서 실측치(實測値)와 비교가 가능한 흐름양상(樣相)은 대체로 실측치(實測値)와 근사(近似)하게 나타났다.