• 한국안전학회지
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• 제15권4호
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• pp.127-133
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• 2000

The incomplete treatment of the swinery wastewater is one of the major factors of the river contamination resulting from an eutrophication. Even through many treatments were considered to reduce the contamination of the river by the swinery wastewater, the most effective treatment was not developed yet. Therefore, this project was focused on the development of the treatment that was a low cost and a high efficiency using a steel-making slag. The swinery wastewater was passed through a U-type tube packing the slag in the laboratory. And the swinery wastewater was cleaned effectively in the laboratory experiment. Based on these laboratory results, the treatment facility in a stock farm was constructed to confirm the effect of slag on the first-treated swinery wastewater. After the treatment of the first-treated swinery wastewater through the slag, the water quality of the river was improved and the biodiversity was increased.

• 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.

• 건축역사연구
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• 제28권2호
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• pp.7-18
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• 2019

The Chosun Dynasty established and implemented measures to prevent Japanese invasion into the southern coast. To this end, the number of naval vessels and the number of ships were increased, and a shipyard(船所) was constructed to protect the safety of the vessels. The shipyard is a port facility where military vessels are anchored and repaired, as well as public facilities that are needed for military training on public and land, as well as facilities for storing supplies and equipment needed for ships on land and defense at the port entrance. Despite being such an important facility for national defense, Shipyard has not been noticed. Studies have shown that the position of shipyard is divided into the riverside type and the riverbank type, which is due to the topographical features of Korea. The repair cycle of naval vessels, the carrying out of Yeonhun(prevent the water from decaying the part of the ship, a raw tree was burned to smoke) and the place of sea training also affected the construction of the Gul River(掘江). The space structure of shipyard is divided into port entry facilities for monitoring and controlling at the entrance to the harbor, border facilities for folding and repairing military vessels, and land facilities for holding land exercises and administrative work of military vessels and military equipment.

• 한국물환경학회지
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• 제37권2호
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• pp.75-91
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• 2021

Ocean dumping manure was prohibited in Korea until the end of 2012. Undumped manure was treated by resourcification, purification, and public process in a facility. But poor storage of untreated manure and overproduced compost can pollute river water. In this study, linear regression, Mann-Kendall, Seasonal Mann-Kendall, LOWESS trend, and Spearman's correlation analysis were conducted for investigating the changes in the water quality of Bukhan and Imjin river before and after the prohibition of ocean dumping. In 2017, the Imjin Riv er basin had more than 5.7 times liv estock breeding heads than the Bukhan Riv er basin and more than 3.5 times livestock manure. The areas of land, farmland, and nutrient balance were also higher in the Imjin River basin. Since the two basins have different environments, it is expected that the characteristics of changes in water quality due to the increase in livestock manure generation and treatment methods will be different when comparing the water quality trends before and after the ban. The result of the trend analysis revealed a decrease in EC before the ban but an increase afterward. T-N and BOD of Imjin river increased slightly before the ban but demonstrated great enhancement thereafter. Other sites and T-P exhibited no trend. The correlation analysis result showed that the increase in the number of livestock rearing was correlated with the increase in T-P of Bukhan River and BOD of Imjin River. The increase in livestock manure production was not correlated with the Imjin River basin, while a correlation was observed with the Bukhan River with an increase in T-N and EC and the decrease in T-P.

• 한국방재학회 논문집
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• 제8권5호
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• pp.111-117
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• 2008

최근 기상이변으로 인해 하천에 설치된 제방과 호안이 자주 유실되고 있으나, 국내의 경우 제방을 보호하기 위한 대표적인 시설인 호안의 경우, 호안을 보호하기 위한 보호공의 안전성과 적정성 분석을 위한 설계기준이 미흡한 실정이다. 본 연구에서는 2007년 8월 전라북도 구례시에 발생한 집중호우로 인해 유실된 황전천의 석축호안 유실원인을 2차원수리해석모형인 SMS를 이용하여 분석하고 또한 계획 중인 석축호안 보호공의 적정성을 평가하였다. 이를 위해 일반적인 교각세굴보호공 설계방식과 호안공법 채택방식 및 하천설계기준에 의해 적합한 보호공의 제원을 산정하였으며, 산정된 보호공의 제원과 계획안을 비교분석하여 계획 중인 석축호안 보호공의 적정성을 평가하였다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2007년도 추계학술대회 논문집
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• pp.485-488
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• 2007

Riverbank filtration is a kind of artificial aquifer recharge for the fresh water supply. By construction of several production wells penetrating the riverbank, surface water withdrawn from the river would pass riverbed. This extracted water is well known to be cooler than surface water in summer and warmer than surface water in winter, showing more constant water temperature. This characteristic of extracted water is applied to geothermal energy utilization. Prediction of the annual temperature variation of filtrated water is the major concern in this study. In Daesan-myeon, Changwon-si, Gyeongsangnam-do, South Korea, riverbank filtration facility has been on its operation for municipal water supply and thermal energy utilization since 2006. Appropriate hydraulic and thermal properties were estimated for flow and heat transfer modeling with given pumping rate and location. With the calibrated material properties and boundary conditions, we numerically reproduced measured head and temperature variation with acceptable error range. In the numerical simulation, the change of saturation ratio and river stage caused by rainfall was calculated and the resulting variation of thermal capacity and thermal conductivity was considered. Simulated temperature profiles can be used to assess the possible efficiency of geothermal energy utilization using riverbank filtration facility. Influence of pumping rate, pumping location on the extracted water temperature will be studied.

• 환경영향평가
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• 제21권1호
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• pp.93-104
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• 2012

In this research LCA methodology was adapted and analyzed in quantifying estimation of estuarine environment. The analysed objects of estuarine environment were construction methods, facility, and input material into water, and estuarine ecosystem. In this research the function of LCA of estuarine environment was river with the view of controling water, utilizing water, and hydrophilic function. According to the result of research, environmental damage indicator of facility was decreased 346 Pt from 453 Pt at pre-maintenance to 107 pt at post-maintenance. Among raw and subsidiary materials, remicon, stone-netting bag, and pebbles were showing heavy environmental load in the order. Evironmental impact of input material into water system was analyzed from 1,827 Pt environmental load before construction to 1,080 Pt of post-maintenance, and damage indicator was improved at 747 Pt. Water quality was improved from 1,827 Pt (before construction) to 1,080 Pt(after construction), and ecosystem was improved after maintenance. Environmental indicator in ecosystem was analyzed 427 Pt(before construction) to 348 Pt(after construction), and damage indicator of Sumnjingang riverine system was improved as much as 79 Pt. In the conclusion, estuarine environmental monitoring through LCA in the area of facility, input material into water and ecosystem showed that close-to-nature stream was 1,172 Pt better than artificial stream in environmental aspects.

• 한국해양공학회:학술대회논문집
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• 한국해양공학회 2002년도 춘계학술대회 논문집
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• pp.12-16
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• 2002

Soil, ground water and sea bed are exposed to continuous accumulation of polluted materials causing serious environmental damage. It has been reported that such pollution causes a massive mortality of fish stock in rivers by the resuspension of toxic chemicals during strong wind conditions. Therefore, it becomes apparent that there is an immediate demand for the restoration treatment of polluted river bed (or sea bed) sediment layers. Pollution levels of major rivers and ports such as Pal-dang, Kyung-an rivers, Ma-san port are becoming public concern and are posing a serious environmental threat. In particular, the pollution of Shi-hwa river has become a nation wide issue for last few years. In spite of such public concern, the pollution level of such rivers or port are getting worse everyday. In this study, an environmentally sound engineering package is introduced which helps to restore the polluted river bed or sea bed sediments. This engineering package is consisted of a suction facility followed by a series of mechanical, chemical as well as biological treatment units. The suction facility is designed to minimize the secondary pollution due to the resuspension of toxic materials during suction. The sea bed cleaning engineering package is designed to be installed on the top of a floating barge. Such combination of environmental plant and shipbuilding technology provides a cost-effective solution, minimizing the cost involved in the transportation between suction and treatment facilities.

• 한국지리정보학회지
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• 제16권1호
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• pp.15-25
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• 2013

국가하천에 대한 하천대장, 하천측량도 및 부도 등 관련 정보들을 표준화하여 구축함으로써 관련 업무 활용 및 대국민 서비스 등을 실시하기 위해 국토해양부에서는 지난 2000년도부터 하천관리지리정보시스템(RIMGIS; River Information Management GIS)을 구축하여 운영 중에 있다. RIMGIS는 그 동안 정보환경 변화에 능동적으로 대응하기 위해 여러 차례 개선되었으며, 최근 스마트 리버 하천정보 서비스 및 관련 자료가 방대해짐에 따라 빅데이터를 효율적으로 관리하기 위한 개선이 필요한 실정이다. 본 연구에서는 RIMGIS의 현황 파악, 개선방향 도출, 데이터베이스를 재설계, 배포프로그램 개발 및 하천종합정보시스템 제안을 통해 정보환경 변화에 대응해 향후 스마트 리버 하천정보 서비스를 제공하기 위한 방안을 제시하고자 한다. 따라서, RIMGIS의 활용성을 강화하기 위해 속성정보의 엔터티간 연관관계를 구분할 수 있는 유일키와 외부키 등과 하천표준 데이터베이스 관점에서 테이블간의 위상관계를 정립하여 속성정보 DB의 구성과 정보관리를 위하여 연관관계도도 새롭게 제시하였다. 아울러, 하천관리 패러다임 변화에 대응 가능한 하천관련 정보의 효율적인 관리와 이용 체계 수립을 통해 현재 공급자 중심의 시스템 운영을 수요자 중심으로 확대하기 위한 방안을 도출하였다.

• 대한토목학회논문집
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• 제36권1호
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• pp.135-141
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• 2016

본 연구의 목적은 소하천유역의 홍수와 가뭄 예방을 목적으로 설치하는 저류조에 대하여 비용 편익분석을 통해 경제적 타당성을 분석하는데 있다. 소하천유역의 홍수예방이 가능한 저류조 용량에 따른 설치비용을 도출하고, 저류조 설치를 통해 도출될 수 있는 편익요소인 피해금액 및 복구금액, 가뭄예방으로 인한 요소별 편익비용을 적용하여 비용 편익분석을 실시하였다. 이는 홍수와 가뭄을 동시에 예방할 수 있는 다목적 저류조 설치의 타당성을 제시하는 기초자료로 활용할 수 있으며, 세부 연구결과로 자연재해의 피해금액 예측 등 다방면으로 활용할 수 있을 것으로 기대된다.