• 대한토목학회논문집
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• 제34권5호
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• pp.1477-1488
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• 2014

도심지 불투수성 포장의 증가로 지하수위 저하, 생활용수 부족 등의 물과 관련된 다양한 환경문제가 점차 심화되고 있으며, 이를 해결하기 위해 빗물 저류조가 설치되어지고 있다. 빗물 저류조는 지반 저류층에 강우 유출수를 저장하여 향후 갈수기에 이용할 수 있어 도심지의 원활한 물순환에 도움이 된다. 그러나 도심지의 초기 강우는 다량의 비점오염물질을 포함하고 있으므로, 초기 강우를 빗물 저류조에 저류하기 전에 빗물에 포함된 오염물질을 정화하기 위한 시스템이 필요하다. 본 연구에서는 초기 강우의 오염물질 정화를 위해 경제성과 비점오염물질 제거효율 측면에서 우수한 토양여과기술을 적용한 빗물 저류조의 전처리시설인 모래 여과층에 대한 정화효율 및 적용성을 실내 시험과 현장 시험을 통해 평가하였다. 실내 시험은 $20cm{\times}30cm{\times}60cm$의 규격으로 제작된 챔버에 3종류의 각기 다른 모래 여과층을 조성한 후 인공 강우를 유입하는 과정으로 진행되었으며, 유출된 오염수의 TSS (총 부유물질)와 COD (화학적 산소요구량)를 측정하여 모래 여과층의 정화효율을 평가하였다. 또한 폐색 현상으로 인한 모래 여과층의 투수계수 변화를 간접적으로 평가하였다. 실내 시험을 통하여 비점오염물질 정화에 적합한 여과층을 제시하였으며, 이를 현장 빗물 저류조에 시험 시공하여 선정된 여과층의 적용성을 검증하였다.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.54-55
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• 2015

Increase of impervious areas due to expansion of housing area, commercial and business building of urban is resulting in property change of stormwater runoff. Also, rapid urbanization and heavy rain due to climate change lead to urban flood and debris flow damage. In 2010 and 2011, Seoul had experienced shocking flooding damages by heavy rain. All these have led to increased interest in applying LID and decentralized rainwater management as a means of urban hydrologic cycle restoration and Natural Disaster Prevention such as flooding and so on. Urban development is a cause of expansion of impervious area. It reduces infiltration of rain water and may increase runoff volume from storms. Low Impact Development (LID) methods is to mimic the predevelopment site hydrology by using site design techniques that store, infiltrate, evaporate, detain runoff, and reduction flooding. Use of these techniques helps to reduce off-site runoff and ensure adequate groundwater recharge. The contents of this paper include a hydrologic analysis on a site and an evaluation of flooding reduction effect of LID practice facilities planned on the site. The region of this Case study is LID Rainwater Management Demonstration District in A-new town and P-new town, Korea. LID Practice facilities were designed on the area of rainwater management demonstration district in new town. We performed analysis of reduction effect about flood discharge. SWMM5 has been developed as a model to analyze the hydrologic impacts of LID facilities. For this study, we used weather data for around 38 years from January 1973 to August 2014 collected from the new town City Observatory near the district. Using the weather data, we performed continuous simulation of urban runoff in order to analyze impacts on the Stream from the development of the district and the installation of LID facilities. This is a new approach to stormwater management system which is different from existing end-of-pipe type management system. We suggest that LID should be discussed as a efficient method of urban disasters and climate change control in future land use, sewer and stormwater management planning.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.449-452
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• 2008

Originally developed in Scandinavia over 40 years ago, syphonic roof drainage systems have been in use in the UK since the early 1990's. Since then, many large projects have used the syphonic system to overcome installation problems which would have been difficult to solve using a traditional gravity rainwater system.

• 한국조경학회지
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• 제34권4호
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• pp.116-128
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• 2006

This study focuses on hydrological changes caused by developments in the 13th, 14th (Motjarigol) district in Eun Pyoung New Town, Seoul on the basis of the Land Use Planning of development plan. Through analyses from the hydrological experiments about rainfall outflow using universal equation and amounts of infiltration through soils, the changes in amounts of overflows were estimated and the results were discussed from a urban ecological point of view. As a result, it has been predicted that the amount of rainfall outflow at post-development was dramatically increased, compared to pre-development. Installing of Derbris Dams and infiltration facilities were suggested as alternative plan to meditigate these changes. If we apply these alternatives, the rainfall outflow would be reduced up to 30% compared to the development plan without BMPs (Best Management Practice). In conclusion, it is proposed that once the ecological principles were considered during development planning process, we can minimize the adverse effects of developments to our environments.

• 대한환경공학회지
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• 제36권4호
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• pp.271-276
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• 2014

본 연구는 물재이용 활성화 방안 및 물재이용 정책시행을 위한 기초적인 자료로 제시하기 위해 20세 이상의 수원시민을 대상으로 설문조사하였다. 설문지는 시민들의 물재이용 결정요인을 분석하기 위해 빗물 재이용과 하수처리수 재이용 2개 분야로 구성하였다. 물재이용 결정요인은 요인분석을 실시하여 요인의 신뢰도 Cronbach's Alpha 값이 0.4 이상으로 나타난 19 문항을 이용하였다. 빗물 이용에 영향을 미치는 요인은 환경보호, 수도요금, 단수위험 및 기후변화로 나타났다. 빗물 이용에 관한 모든 변수들의 총 설명력은 39.7%이며 환경보호는 28.1%의 설명력을 보였다. 하수처리수 재이용에 영향을 미치는 요인으로 가장 먼저 환경보호 요인이 투입되었으며 설명력은 24.2%였다. 하수처리수 재이용 결정요인에 수도요금, 물관리 정책, 기후 변화 및 단수위험이 추가적으로 투입된 결과, 각각의 설명력이 4.3%, 2.8%, 3.3%, 1.1% 증가되었다. 따라서 물 재이용을 활성화하기 위해서는 물재이용 정책 개발뿐만 아니라 환경보호에 관한 교육과 재이용수의 수질에 대한 신뢰도 향상이 중요한 요인이라고 생각된다.

• 한국환경복원기술학회지
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• 제26권4호
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• pp.51-59
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• 2023

Despite countries' efforts to reduce carbon emissions, carbon emissions have increased in recent decades along with energy use, of which building energy uses account for a large proportion. Energy savings are essential as a strategy to reduce carbon emissions in existing buildings. The field experiment on the roof of a building located in Seoul was designed to measure the temperature reduction effect of green roof with rainwater storage tank to reduce cooling energy consumption in summer. The results showed that the mean mean surface temperature under the green roof was 14.77 degrees lower than that of the non-green roof from 13:00 P.M. to 15:00 P.M., which would have a great effect on reducing cooling energy. From 01:00 A.M. to 03:00 A.M., the effect was 3.36 degrees, showing that tropical nights could be improved. The temperature reduction effect due to the rainwater storage system increased by 1.45 degrees during the day and decreased by 0.63 degrees at night. The storage system can be strategically utilized to reduce carbon emissions during the week when cooling energy increases significantly.

• 상하수도학회지
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• 제29권1호
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• pp.1-9
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• 2015

A combined treatment system using multiple source water is becoming important as an alternative to conventional water supply for small-scale water systems. In this research, combined water treatment systems were investigated for simultaneous use of multi-source water including rainwater, ground water, river water, and reclaimed wastewater. A laboratory-scale system was developed to systematically compare various combinations of water treatment processes, including sand filtration, microfiltration (MF), granular activated carbon (GAC), and nanofiltration (NF). Results showed that the efficiency of combined water treatment systems was affected by the quality of feed waters. In addition, a simply approach based on the concept of linear combination was suggested to support a decision-making for the optimum water treatment systems with the consideration of final water quality.

• 상하수도학회지
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• 제28권1호
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• pp.111-124
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• 2014

Decentralized water supply systems, treating the water in users'vicinity, cutting down the distribution system, utilizing the alternative water resources(rainwater harvesting, water reclamation and reuse and so on.) and saving energy and other resources, could be categorized into POU(Point-Of-Use), POE(Point-Of-Entry) and community small scale system. From the literature review, we could thought that decentralized water supply system and hybrid system(integrating centralized and decentralized water supply system within urban water management) might have strengthening comparative advantages to centralized system with respect to: (1) water security, (2) sustainability, (3) economical affordability. Even though it is difficult to derive and quantify direct benefit advantages from decentralized and hybrid system in comparison with centralized system, (1) operational cost reduction, (2) assurance for safe and stability water supply and (3) greenhouse gas reduction can be expected from successful establishment of the former.

• 융합보안논문지
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• 제20권1호
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• pp.33-40
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• 2020

하천 인근에 위치한 빗물펌프장은 유수지를 대상으로 적절한 규칙에 따라 펌프를 가동함으로써 도심지 및 농경지 침수 피해를 예방하는 기능을 수행한다. 현재 대부분의 빗물펌프장은 유수지의 수위를 기준으로 단순한 규칙 기반의 펌프운영 정책을 사용하고 있다. 최근 지구온난화로 인한 기후 변화가 예측하기 어려운 강우량의 변화를 발생시키고 있다. 따라서 단순한 펌프정책으로는 지구온난화로 인한 갑작스러운 유수지 변화에 적절하게 대처하기 어렵다. 본 논문은 강우량과 저수량, 유수지 수위 등의 정보를 이용해 시스템이 적정 유수지 수위을 유지할 수 있도록 펌프 가동을 선택할 수 있는 심층 강화학습 기반의 자동 빗물펌프 운용 방법을 제시한다. 제안한 방법의 타당성을 검증하기 위해 강우-유출 모의 모델인 Storm Water Management Model(SWMM)을 이용해 모의실험을 수행하고 현장에서 사용되고 있는 기존 펌프 정책과 성능을 비교하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 추계학술대회 논문집 전력기술부문
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• pp.377-379
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• 2001

Contamination flashover is responsible for insulator electrical failures. Particularly, in Korea, with its perennially dry spring, the first spring rain often cause serious line outages by forming a conductive liquid film on the insulator surface. Rainwater and fog are not normally conductive but unfortunately atmospheric dust deposited on the insulator surface contains soluble salts which may lead to bad condition of insulation by combining watery and salts. Transmission design engineers have used a contamination map drawn on the traditional paper map. But it is not convenient because it does not include the information of Geographic Information accurately. This paper explains the newly developed salt contamination map program using Geographic Information System, which provide accurate geographic information. The program is designed to use four parts of datum, salt contamination levels, 345kV & 154 kV transmission lines, power plants & substations and background map. The digital background map is composed of raster files, the others are done by vector map.