• Journal of Korean Society of Water and Wastewater
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• v.23 no.2
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• pp.223-230
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• 2009

Most urban water management systems are becoming vulnerable to flooding and drought due to the climate change (CC), urbanization and energy shortage. Despite of poor water management circumstances caused by extremely uneven annual rainfall and hilly terrain, traditionally we have made a sound and sustainable life based on our own philosophy and technologies which copes with our rigid environment. In this study a new paradigm of rainwater management is suggested and multipurpose and creative rainwater harvesting and management (RWHM) systems are introduced providing several case studies such as rainfall storage drainage (RSD) system, rainwater infiltration facilities and star city RWHM system. This new RWHM paradigm leads Seoul Metropolitan Government (SMG) in the Republic of Korea to change regulations and politics for the integrated RWHM. Finally, RWHM is expected to improve the safety, efficiency, energy consumption of urban water infrastructure, to reduce urban heat island phenomenon and, furthermore, to contribute in finding solutions for worldwide water issues and to adapt CC.

• Journal of Korean Society of Water and Wastewater
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• v.33 no.2
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• pp.103-110
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• 2019

Management of stormwater runoff is considered a nationwide challenge. To deal with this challenge, many researches have been conducted to study initial stage of stormwater fee imposition. The objective of this study was to recommend a framework for stormwater fee imposition not only for funding the stormwater management programs but also for encouraging people to decrease impervious area. This study focused on, regulations, financial resources and international cases related to stormwater runoff management. Polluter pays principle, which is generally recognized environmental policy principle is regarded the basis of stormwater fee imposition. Three components suggested for the stormwater rate structure are 1) stormwater utility revenue requirement, 2) billable equivalent stormwater unit, 3) system unit cost. The key point of stormwater rate structure is the "Equivalent Residential Unit(ERU)". The concept of an ERU is one residential area with a runoff coefficient. The runoff coefficient is that portion of rainfall that becomes runoff rather than infiltrating into the ground. In addition to this, this study took into account the observed data simulation for the separation of stormwater treatment expenditure from the comprehensive wastewater treatment cost.

• Journal of Korean Society of Environmental Engineers
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• v.34 no.6
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• pp.373-381
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• 2012

An automatic flow and water quality monitoring system was applied to estimate pollutant loads to an urban stream during storm events in DTV (Daeduk Techno Valley), Daejeon, Korea. The monitoring system consists of rainfall gage, ultrasonic water level meter, water quality sensors for DO, temperature, pH, conductivity, turbidity and automatic water sampler for further laboratory analysis. All data are transmitted through on-line system and the monitoring system is designed to be controlled manually in the field and remotely from laboratory computer. Flow rates were verified with field measurements during storm events and showed good agreements. Automatic sampler was used to collect real time samples and analyzed for BOD, COD, TN, TP, SS and other pollutant concentrations in the laboratory. SWMM (Storm Water Management Model) urban watershed model was applied and calibrated using the observed flow and water quality data for the study area. While flow modeling results showed good agreement for all events, water quality modeling results showed variable levels of agreement. These results indicate that current options in the SWMM model to predict pollutant build up and wash-off effects are not sufficient to satisfy modeling of all the rainfall events under study and thus need further modification. This study showed the automatic monitoring system can be used to provide data to assist further refinement of modeling accuracy. This automatic stormwater monitoring and modeling system can be used to develop basin scale water quality management strategies of urban streams in storm events.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.176-176
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• 2020

본 연구는 북한의 식량난과 산림복구의 일환으로 추진되고 있는 임농복합경영의 현주소를 파악하고 북한의 임농복합경영이 가지는 대표적인 문제점이자 한국농어촌공사에서 접근할 수 있는 기술분야인 관개시설의 구축방안에 초점을 두어 해결방안을 모색하고자 하였다. 특히 임농복합경영 대상지의 경우, 산지를 개간하여 경사도 30° 이하의 경사지를 이용하고 있기 때문에 이 경우 토성이 사질 혹은 식질이 많아 보수력이 평지에 비해 크게 떨어지고 유효수분이 있는 토심도 낮기 때문에 가뭄 및 한발피해에 취약하다. 한발 시 관개를 위해 필요한 저수규모를 설정하기 위해서 강릉 안반데기와 영월 조전지구에서 산정한 단위용수량을 근거로 저수규모를 결정하였다. 계곡물이나 빗물은 자연흐름식 등의 방법으로 동력을 사용하지 않고도 집수할 수 있지만 하천이나 지하수를 퍼올려야 할 경우는 동력이 필수적으로 요구되기 때문에 대체에너지 활용을 고려하는 것이 필요하다. 따라서 임농복합경영을 위한 관개분야에 대한 대책으로 복합 취수원에 따라 하천, 지하수, 계곡, 빗물 등으로 구분하고 그에 따른 주요시설과 사업비를 산출하였다. 북한에서는 임농복합경영을 위한 경제성이 있는 규모로 50ha를 제안하고 있어 50ha규모의 임농복합경영 관수시설 부분에 대한 제안과 북한이 추진하고 있는 임농복합경영은 대부분 외부 지원에 의존하고 있기 때문에 지원의 용이성 및 가능성을 고려하여 10ha의 규모 역시 제안하였다. 50ha의 규모일 때 주요시설은 취수보, 양수장, 암반관정, 저수조, 물탱크, 송수관로, 급수관로, 급수대, 팜폰드, 둠벙, 배수로, 농로 등이며 수원공은 하천, 계곡, 지하수, 빗물이다. 동력은 태양광, 풍력으로 저수규모는 저수조에 2,000톤(40%여유수량), 팜폰드 및 둠벙에 800톤(60%여유수량)을 확보하였다. 10ha의 규모일 때 주요시설은 저수조, 물탱크, 급수관로, 팜폰드, 둠벙, 배수로, 농도 등이며 수원공은 빗물이다. 동력은 경사차를 이용한 자연흐름식 집수 방식으로 무동력이다. 본 연구는 향후 남북관계 개선시 우선 지원사업의 하나로 활용이 가능하다는데 의의가 있다. 50ha의 규모에 제시된 동인 태양광 및 풍력의 경우도 지속적인 유지관리 비용이 들지 않지만 초기 설치비가 높기 때문에 경제성이 있는 관개시스템을 개발할 필요가 있다.

• Proceedings of the Korea Water Resources Association Conference
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• 2023.05a
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• pp.364-364
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• 2023

최근 환경부에서 발표한 「제3차(2021~2025) 강우유출 비점오염관리 종합대책(2020)」에 의하면, 우리나라는 지난 50년간 급격한 도시화, 산업화 과정을 거치면서 불투수면적이 전 국토의 약 22.4%에 달한다고 보고되고 있다. 특히 전체 소권역의 6%에 해당하는 51개 소권역의 경우 불투수 면적률 25%를 넘어서고 있는 것으로 조사되었다. 이러한 불투수면의 증가는 기후변화에 의한 영향으로 토양 침투량과 기저유출량을 감소, 갈수기 하천건천화 심화, 우기 표면유출수 증가를 가중시키며 이로인한 비점오염물질 유입 증가, 수질 악화의 원인으로 작용 될 수 있다. 이에 정부에서는 저영향개발(Low Impact Development, LID) 사업 및 친환경그린인프라(Green Infrastructure, GI) 기술요소를 적용하여 도시지역 기후위기 대응 수단의 일원으로 우수유출 저감, 물순환 구조 개선, 비점오염원을 관리하고자 '그린빗물인프라(Green Stormwater Infrastructure, GSI) 조성 사업'을 추진하여 공공청사를 중심으로 학교, 도서관, 체육시설, 공원 등 적용 범위를 확대하고 있다. 이에 본 연구에서는 기후변화에 가장 취약한 해안도시지역인 경상남도에 위치하고 있으며, 불투수면적이 높고 노후화된 소규모 청사 2곳을 시범 구역으로 선정하였다. 각 시범 구역별 GSI 시설 적용이 가능한 주차장, 화단, 옥상 등의 개선방안을 제시하였으며, 적용 규모를 달리하여 물순환·물 환경 개선 효과를 검증하였다. 검증에는 국내에서 개발된 K-LIDM 모형을 활용한 우수유출저감 및 직접유출체적 산정결과를 통해 물순환 효과를, 국립환경과학원에서 제시되고 있는 '토지계 지목별 발생부하원단위', 수질환경개선 보고서에서 제시된 침투형, 식생형 비점오염저감시설의 저감효율을 활용하여 물순환 저감효과를 분석하여 비교하였다.

• Proceedings of the Korean Institute of Landscape Architecture Conference
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• 2020.06a
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• pp.77-78
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• 2020

• KIEAE Journal
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• v.7 no.2
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• pp.25-30
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• 2007

The purpose of this research is to analyze the water quantity of the rainwater detention system based on the Planning Simulation in Residential Areas. The contents of this research consists of two main parts. The first part is to calculate the supply water quantity of the rainwater detention system and the demand water quantity of the Wonheungs' ecological park. The second part is to analyze the difference between demand and supply of water quantity, based on the Planning Simulation, in the rainwater detention system. This research will contribute to the establishment of the environment-friendly site planning methods which increase the quality of residential environment in apartment housing.

• Journal of Korean Society of Water and Wastewater
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• v.28 no.5
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• pp.517-527
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• 2014

As sewer flooding frequents due to localized and concentrated stormwater and increased non-permeable surface area after urbanization, building cities with sound water recycle and accordingly efficient management of rainwater is demanded. To do this, the existing sewage (including rainwater) fee imposition system should be philosophically evaluated. This study presents problematic issues of the existing domestic sewage fee imposition system considering the principle of sharing costs on the service of sewage and rainwater collection and treatment. Four methods to improve the existing sewage fee imposition system are suggested: 1) imposing stormwater fee according to Polluter Pays Principle, 2) clarification of the share of public sector, 3) reducing or exempting the sewerage fee for inhabitants reducing urban runoff by constructing their own rainwater management facilities, 4) imposing charge for discharging rainwater to sewers due to new development action. Short, mid, or long term planning for rainwater management is recommended considering the situation of each municipality.

• KIEAE Journal
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• v.5 no.3
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• pp.17-24
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• 2005

Until today, rainwater management was processed without disposing the peak discharge, which was due to rainfall, to provide stability against flood damage. In this process, the natural hydrologic cycle changed quickly, and because of this, some problems that could harm human beings and the environment arose. These problems need to be addressed accordingly. One of the proposals was to carry out decentralized rainwater management through a natural hydrologic cycle on site, including utilization, infiltration, detention, and retention of rainwater. This study aims to set the direction of applicable decentralized rainwater management to housing complex in Korea. Therefore, spacial properties in urban housing complexes were analysed such as the impervious area-to-land ratio, the green area-to-land ratio, artificial land-to-land ratio etc. As the result of this study, when a housing complex was small and developed by reconstruction, the impervious area, artificial land, the green area in the artificial land-to-land ratio were high. So, direction of decentralized rainwater management of these housing complexes is available to utilize and detain rainwater. On the other hand, those of big housing complexes in land development district were low relatively. So, direction of decentralized rainwater management of these housing complexes is available to infiltrate and evaporate rainwater.

• KIEAE Journal
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• v.6 no.3
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• pp.3-10
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• 2006

As environmental problems and water-shortage phenomenon become a global issue, many states look for the effective method to use water resources. So, decentralized rainwater management is recognized as a new water management system that rainwater can be infiltrated and used on-site. But it is little difficult to build a park, lake, and forest for evaporating rainwater in city because the land price of city is very high. In order to build an excellent infiltration system for a dwelling and a park in Korea, KICT has developed Linear infiltration system. This infiltration system is consist of first flush treatment, storage and infiltration, overflow control system. These elements are connected closely and working as a combined system. A storm sewer can be changed by the linear infiltration system. This study is to make design guideline using Linear infiltration system in apartment house. So ATV-DVWK-M13, FLL and present condition of Korean rainwater system were analyzed and the guidelines direction were set up. Through this study, a foundation is prepared to build the decentralized rainwater management of apartment house.