• 전기의세계
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• v.12
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• pp.56-61
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• 1963

전원개발5개년계획의 하나인 의암수력발전이 민간인기업체에 의해서 건설중이라는 사실하나 만으로도 충분히 의의가 있다고 생각한다. 필자가 들은 바는 한때 의암건설을 민간건설사업으로부터 정부건설사업으로 하려든 움직임도 있었다고 하며, 또 전력수급계획면으로 볼때 의암건설이 당장 필요없으며 경제계획5개년계획사업으로 할 수 없다는 등등 이밖에 허다한 난관을 극복하면서 의암건설사업을 착착 진행중에 있다. 앞으로 의암발전소에서 생산되는 전력은 한국경제자립에 기여가 될 날이 올것을 의심하지 않는다.

• Korean Journal of Ecology and Environment
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• v.46 no.4
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• pp.488-498
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• 2013

A three-dimensional hydrodynamic model was applied to the Lake Euiam. The lake has three inflows, of which Gongji Stream has the smallest flow rate and poorest water. The dam-storage volume, watershed area, lake shape and discharge type of the Chuncheon Dam and the Soyang Dam are different. Therefore, it is difficult to analyze the water plume and mixing pattern due to the difference of the two dams regarding the amount of outflow and water temperature. In this study, we analyzed the effects of different characteristics on temperature and conductivity using the model appropriate for the Lake Euiam. We selected an integrated system supporting 3-D time varying modeling (GEMSS) to represent large temporal and spatial variations in hydrodynamics and transport of the Lake Euiam. The model represents the water temperature and hydrodynamics in the lake reasonably well. We examined residence time and spreading patterns of the incoming flows in the lake based on the results of the validated model. The results of the water temperature and conductivity distribution indicated that characteristics of upstream dams greatly influence Lake Euiam. In this study, the three-dimensional time variable water quality model successfully simulated the temporal and spatial variations of the hydrodynamics in the Lake Euiam. The model may be used for efficient water quality management.

• The Journal of Korean Philosophical History
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• no.23
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• pp.245-273
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• 2008

Choi Je Woo was stressed superiority of god and it was immanence. IT was religion human theory. Choi See Hyung and Son Byung Hee writed change from god to the heaven. It was stressed superiority of god better than immanence of heaven. Choi Je Woo of human must attend god changed Choi See Hyung and Son Byung Hee of human being god. Choi See Hyung and Son Byung Hee was stressed the subject. Choi Je Woo was stressed superiority of god speciality. Choi See Hyung and Son Byung Hee was not disappeared absolutely. Son Byung Hee of human being god disappeared absolutely because it leave only immanence of god by Yi Don Hwa.

• Journal of Environmental Impact Assessment
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• v.23 no.5
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• pp.406-416
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• 2014

When abnormal taste and odor were detected in the tap water of the North-Han river watershed during the dry season in late 2011, excessive nutrients with algal growth in the Lake Uiam and weather factors were considered to be among its causes. The nutrients, in particular, originated from domestic sewage in the Chuncheon area. This study was conducted to investigate relations between the algal growth in the Lake Uiam and the contribution of nutrients from public sewage treatment works (PSTWs) in Chuncheon city, and based on this to analyze the environmental impact. Nutrients in the Lake Uiam have already been accumulated to the level of eutrophication. Even in winter, the conditions in the lake such as retention time and water temperature were favorable to boost algal growth. After phosphorus treatment processes were introduced, the PSTWs in the Lake Uiam watershed were able to reduce the total phosphorus loads by 43%. The algal concentrations in the Lake Uiam also dropped by about 7%. The nitrogen treatment efficiencies in the PSTWs, on the other hand, remained almost the same after the introduction of the phosphorus treatment processes. To solve these problems more efficiently, it is necessary to develop management strategies for the upstream area of the Lake Uiam and set plans to improve nitrogen treatment operation and management for the PSTWs in Chuncheon.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.42 no.2
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• pp.171-179
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• 2022

In this study, the characteristics of algae mitigation according to dam operation were quantitatively analyzed for Uiam Lake, where the Chuncheon Dam is located upstream of the main stream, Uiam Dam is located downstream, and Soyang Dam is located in the tributary stream. Nine dam operation scenarios were applied to the event of the summer of 2018 (at that time an algae alert occurred) using the EFDC model, which is capable of calculating three-dimensional hydrodynamics and water quality levels such as those associated with chlorophyll-a. The dam operation scenarios were set to generate a flushing effect via discharges in the form of pulse waves from the upstream dams and by lowering the water level at the downstream dam. At Uiam Lake, the flushing effect was different depending on the operation of the dam, and the amount of algae reduction at each point was different owing to topographic characteristics and the different base water temperatures from BukHan River and Soyang River. With regard to a point located on the left bank, it was predicted that the peak level of chlorophyll-a would be reduced by approximately 50 % or more upon pulsed discharge at 50 m³/s for three days at Soyang Dam. However, for the right bank, the amount of discharge from Soyang Dam had little effect on algae mitigation. Therefore, an appropriate dam operation could be effective for algae mitigation at specific points in the water body where large dams exist upstream and downstream, such as at Uiam Lake, in an emergency situation in which algal blooms rapidly.

• The Journal of Korean Philosophical History
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• no.30
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• pp.37-57
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• 2010

Su-un 'sicheonju' is emphasised transcendency of god that it is sincerity, earnestness and belief in the practice ethics. But he is exhibited the ancient sage-kings of ancient propriety and humanity, righteousness, propriety and wisdom. Su-un 'sicheonju' change 'insicheon' of Hae-wol at immanence of god the emphasis. He is exhibited 'sainyeocheon' in the practice ethics. Eu-am is changed 'Innaecheon' more immanence of god the emphasis. He exhibit good the subject of human. It's the change cause research Su-un. He exhibit Confucianism ethics at the same time as point out Confucianism because Hae-wol and Eu-am is changed the emphasis at the subject of human. It is influenced pantheism and the theory of social evolution.

• Proceedings of the Korea Water Resources Association Conference
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• 2021.06a
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• pp.318-318
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• 2021

2020년 한강 유역의 홍수기(7월 ~ 9월) 3개월 강수량은 1,110.9mm에 달하며 평년대비 131.7%의 상당히 많은 강수량이 관측되었다. 특히 8월은 평년대비 215.2% 강수량을 보이며 큰 홍수사상이 발생하였다.(출처 한강홍수통제소 월간수자원현황및전망) 본 연구에서는 2020년 홍수기 한강 유역 주요 댐의 유입량과 유출량을 분석하였다. 유출입량 산정은 실측자료와 댐 방류량자료를 이용하였다. 산정 결과 달천 괴산댐의 경우 2020년 7월 ~ 2020년 9월, 3개월 동안 유입량(후영교)은 약 5.15억m³이었으며 이 기간의 유출량(댐 방류량)은 약 5.24억m³으로 조사되었다. 같은 기간의 북한강 유역 화천댐 유입량은 산정이 불가능 하였으며 유출량(댐 방류량)은 약 22.24억m³, 춘천댐 유입량(화천댐 방류량 + 용신교 + 오탄교)은 26.86억m³, 유출량(춘천댐 방류량)은 33.60억m³, 의암댐 유입량(춘천댐 방류량 + 소양강댐 방류량)은 55.39억m³, 유출량(의암댐 방류량)은 64.69m³, 청평댐 유입량(의암댐 방류량 + 한덕교 + 목동교)은 78.29억m³, 유출량(청평댐 방류량)은 75.86억m³으로 나타났다. 같은 기간 댐 저류 변화량은 괴산댐 0.002억m³, 춘천댐 0.07억m³, 의암댐 0.15억m³, 청평댐 0.02억m³으로 큰 변화가 없는 것으로 나타났다. 기본적으로 댐 유출량과 유입량의 차는 저류량(저류변화량)과 같아야 한다. 2020년 홍수기(7월~9월) 주요 댐의 유입량, 유출량, 저류량을 검토한 결과 다소 큰 차이를 보였다. 이는 실측 유량의 오차도 일부 있겠지만 댐 저수지 수위 계측의 불확실성, 여수로 방류량의 정확도, 저수지 증발량, 미계측유역의 유출 미고려 등에서 발생하는 오차도 있는 것으로 판단된다.

• Journal of Radiation Protection and Research
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• v.40 no.4
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• pp.223-230
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• 2015

The objective of this study is to identify the radionuclide distribution in public water by carrying out the analysis of artificial radionuclides($^{134}Cs$, $^{137}Cs$, $^{239+240}Pu$), natural radionuclide($^{210}Pb$) and TOC in the lake Euiam sediment in Chuncheon, South Korea. The $^{134}Cs$ concentration in all lake sediments showed below MDA values, and the $^{137}Cs$ concentration in lake sediment were ranged from MDA to $8.79Bq{\cdot}kg^{-1}-dry$. The $^{137}Cs$ concentrations in surface sediment were reported to be 2.4 to $4.2Bq{\cdot}kg^{-1}-dry$. The lowest concentration of $^{137}Cs$ was reported at St. 4 and the highest concentration was reported at St. 3, respectively. The $^{239+240}Pu$ concentration in lake sediment were ranged from 0.049 to $0.47Bq{\cdot}kg^{-1}-dry$. The lowest concentration was reported at St. 2 and the highest concentration was reported at St. 3. The correlation(r) between the $^{239+240}Pu$ concentration and $^{137}Cs$ concentration in lake sediment presented higher values (0.54 to 0.97) and this suggests the behavior and origin of $^{137}Cs$ is identical to the $^{239+240}Pu$ in the sediment. The $^{134}Cs$ concentration below MDA value and the $^{239+240}Pu/^{137}Cs$ ratio(mean value of 0.041) indicated that the artificial radionuclides in the sediment were originated from global fallout by the atmospheric testing of nuclear weapons conducted by former USSR and U.S.A, but not from the Fukushima Daiichi NPP accident. The sedimentation rate derived from $^{210}Pb$ age-dating method at St. 2 is calculated to be $0.31{\pm}0.06cm{\cdot}y^{-1}$. This value is similar to the value ($0.41{\pm}0.05cm{\cdot}y^{-1}$) estimated from the $^{137}Cs$ maximum peak produced from early 1960's. The content of TOC in lake Euiam sediments varied from 0.20 to 13.01%. While the highest correlation between TOC and $^{137}Cs$ concentration in the sediment were found at St. 1, the others presented the low correlation.

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.152.1-152
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• 1997

• Proceedings of the Korea Water Resources Association Conference
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• 2003.05b
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• pp.675-678
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• 2003